/*
 * Copyright (C) 2001 - 2002 Carlos Perelló Marín <carlos@gnome-db.org>
 * Copyright (C) 2001 - 2003 Rodrigo Moya <rodrigo@gnome-db.org>
 * Copyright (C) 2002 - 2003 Gonzalo Paniagua Javier <gonzalo@src.gnome.org>
 * Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
 * Copyright (C) 2004 J.H.M. Dassen (Ray) <jdassen@debian.org>
 * Copyright (C) 2004 Julio M. Merino Vidal <jmmv@menta.net>
 * Copyright (C) 2004 Jürg Billeter <j@bitron.ch>
 * Copyright (C) 2004 Nikolai Weibull <ruby-gnome2-devel-en-list@pcppopper.org>
 * Copyright (C) 2005 Denis Fortin <denis.fortin@free.fr>
 * Copyright (C) 2005 - 2013 Vivien Malerba <malerba@gnome-db.org>
 * Copyright (C) 2005 Álvaro Peña <alvaropg@telefonica.net>
 * Copyright (C) 2008 - 2009 Bas Driessen <bas.driessen@xobas.com>
 * Copyright (C) 2008 - 2011 Murray Cumming <murrayc@murrayc.com>
 * Copyright (C) 2009 Armin Burgmeier <armin@openismus.com>
 * Copyright (C) 2010 David King <davidk@openismus.com>
 * Copyright (C) 2011 Daniel Espinosa <despinosa@src.gnome.org>
 * Copyright (C) 2011 Marek ÄŒernockÃ½ <marek@manet.cz>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#undef GDA_DISABLE_DEPRECATED
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <glib/gi18n-lib.h>
#include <glib/gstdio.h>
#include <libgda/gda-data-model-array.h>
#include <libgda/gda-data-model-private.h>
#include <libgda/gda-util.h>
#include <libgda/gda-server-provider-extra.h>
#include <libgda/gda-server-operation-private.h>
#include "gda-sqlite.h"
#include "gda-sqlite-provider.h"
#include "gda-sqlite-recordset.h"
#include "gda-sqlite-ddl.h"
#include "gda-sqlite-util.h"
#include "gda-sqlite-meta.h"
#include "gda-sqlite-handler-bin.h"
#include "gda-sqlite-handler-boolean.h"
#include "gda-sqlite-blob-op.h"
#include <libgda/gda-connection-private.h>
#include <libgda/binreloc/gda-binreloc.h>
#include <libgda/gda-set.h>
#include <libgda/gda-statement-extra.h>
#include <sql-parser/gda-sql-parser.h>
#include <stdio.h>
#include "xml_embedded.h" /* this one is dynamically generated */
#define _GDA_PSTMT(x) ((GdaPStmt*)(x))
#include <libgda/gda-debug-macros.h>

#define FILE_EXTENSION ".db"
static gchar *get_table_nth_column_name (GdaConnection *cnc, const gchar *table_name, gint pos);

/* TMP */
typedef struct {
	GdaSqlStatement *stmt;
	gchar   *db;
	gchar   *table;
	gchar   *column;
	gboolean free_column; /* set to %TRUE if @column has been dynamically allocated */
	GdaBlob *blob;
} PendingBlob;

static PendingBlob*
make_pending_blob (GdaConnection *cnc, GdaStatement *stmt, GdaHolder *holder, GError **error)
{
	PendingBlob *pb = NULL;
	GdaSqlStatement *sqlst;
	const gchar *hname;

	g_return_val_if_fail (GDA_IS_STATEMENT (stmt), NULL);
	g_return_val_if_fail (GDA_IS_HOLDER (holder), NULL);
	hname = gda_holder_get_id (holder);
	g_return_val_if_fail (hname && *hname, NULL);

	g_object_get (G_OBJECT (stmt), "structure", &sqlst, NULL);
	g_return_val_if_fail (sqlst, NULL);

	switch (sqlst->stmt_type) {
	case GDA_SQL_STATEMENT_INSERT: {
		GdaSqlStatementInsert *istmt = (GdaSqlStatementInsert*) sqlst->contents;
		gint pos = -1;
		GSList *vll;
		for (vll = istmt->values_list; vll && (pos == -1); vll = vll->next) {
			GSList *vlist;
			gint p;
			for (p = 0, vlist = (GSList *) vll->data;
			     vlist;
			     p++, vlist = vlist->next) {
				GdaSqlExpr *expr = (GdaSqlExpr *) vlist->data;
				if (!expr->param_spec)
					continue;
				if (expr->param_spec->name &&
				    !strcmp (expr->param_spec->name, hname)) {
					pos = p;
					break;
				}
			}
		}
		if (pos == -1) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
				     _("Parameter '%s' not found is statement"), hname);
			goto out;
		}
		GdaSqlField *field;
		field = g_slist_nth_data (istmt->fields_list, pos);
		if (field) {
			pb = g_new0 (PendingBlob, 1);
			pb->table = istmt->table->table_name;
			pb->column = field->field_name;
			pb->free_column = FALSE;
		}
		else if (istmt->fields_list) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
				     _("No column name to associate to parameter '%s'"),
				     hname);
			goto out;
		}
		else {
			gchar *fname;
			fname = get_table_nth_column_name (cnc, istmt->table->table_name, pos);
			if (fname) {
				pb = g_new0 (PendingBlob, 1);
				pb->table = istmt->table->table_name;
				pb->column = fname;
				pb->free_column = TRUE;
			}
			else {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
					     _("No column name to associate to parameter '%s'"),
					     hname);
				goto out;
			}
		}

		break;
	}
	case GDA_SQL_STATEMENT_UPDATE: {
		GdaSqlStatementUpdate *ustmt = (GdaSqlStatementUpdate*) sqlst->contents;
		gint pos = -1;
		GSList *vlist;
		gint p;
		for (p = 0, vlist = ustmt->expr_list;
		     vlist;
		     p++, vlist = vlist->next) {
			GdaSqlExpr *expr = (GdaSqlExpr *) vlist->data;
			if (!expr->param_spec)
				continue;
			if (expr->param_spec->name &&
			    !strcmp (expr->param_spec->name, hname)) {
				pos = p;
				break;
			}
		}
		if (pos == -1) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
				     _("Parameter '%s' not found is statement"), hname);
			goto out;
		}
		GdaSqlField *field;
		field = g_slist_nth_data (ustmt->fields_list, pos);
		if (field) {
			pb = g_new0 (PendingBlob, 1);
			pb->table = ustmt->table->table_name;
			pb->column = field->field_name;
			pb->free_column = FALSE;
		}
		if (ustmt->fields_list) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
				     _("No column name to associate to parameter '%s'"),
				     hname);
			goto out;
		}
		else {
			gchar *fname;
			fname = get_table_nth_column_name (cnc, ustmt->table->table_name, pos);
			if (fname) {
				pb = g_new0 (PendingBlob, 1);
				pb->table = ustmt->table->table_name;
				pb->column = fname;
				pb->free_column = TRUE;
			}
			else {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
					     _("No column name to associate to parameter '%s'"),
					     hname);
				goto out;
			}
		}
		break;
	}
	default:
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
			     GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
			     "%s",_("Binding a BLOB for this type of statement is not supported"));
		goto out;
	}

 out:
	if (pb)
		pb->stmt = sqlst;
	else
		gda_sql_statement_free (sqlst);
	return pb;
}

static void
pending_blobs_free_list (GSList *blist)
{
	if (!blist)
		return;
	GSList *l;
	for (l = blist; l; l = l->next) {
		PendingBlob *pb = (PendingBlob*) l->data;
		if (pb->stmt)
			gda_sql_statement_free (pb->stmt);
		if (pb->free_column)
			g_free (pb->column);
		g_free (pb);
	}

	g_slist_free (blist);
}

/* TMP */

/*
 * GObject methods
 */
static void gda_sqlite_provider_class_init (GdaSqliteProviderClass *klass);
static void gda_sqlite_provider_init       (GdaSqliteProvider *provider,
					    GdaSqliteProviderClass *klass);
static GObjectClass *parent_class = NULL;

/*
 * GdaServerProvider's virtual methods
 */
/* connection management */
static gboolean            gda_sqlite_provider_open_connection (GdaServerProvider *provider, GdaConnection *cnc,
								GdaQuarkList *params, GdaQuarkList *auth,
								guint *task_id,
								GdaServerProviderAsyncCallback async_cb, gpointer cb_data);
static gboolean            gda_sqlite_provider_close_connection (GdaServerProvider *provider, GdaConnection *cnc);
static const gchar        *gda_sqlite_provider_get_server_version (GdaServerProvider *provider, GdaConnection *cnc);
static const gchar        *gda_sqlite_provider_get_database (GdaServerProvider *provider, GdaConnection *cnc);

/* DDL operations */
static gboolean            gda_sqlite_provider_supports_operation (GdaServerProvider *provider, GdaConnection *cnc,
								   GdaServerOperationType type, GdaSet *options);
static GdaServerOperation *gda_sqlite_provider_create_operation (GdaServerProvider *provider, GdaConnection *cnc,
								 GdaServerOperationType type,
								 GdaSet *options, GError **error);
static gchar              *gda_sqlite_provider_render_operation (GdaServerProvider *provider, GdaConnection *cnc,
								 GdaServerOperation *op, GError **error);

static gboolean            gda_sqlite_provider_perform_operation (GdaServerProvider *provider, GdaConnection *cnc,
								  GdaServerOperation *op, guint *task_id,
								  GdaServerProviderAsyncCallback async_cb,
								  gpointer cb_data, GError **error);
/* transactions */
static gboolean            gda_sqlite_provider_begin_transaction (GdaServerProvider *provider, GdaConnection *cnc,
								  const gchar *name, GdaTransactionIsolation level,
								  GError **error);
static gboolean            gda_sqlite_provider_commit_transaction (GdaServerProvider *provider, GdaConnection *cnc,
								   const gchar *name, GError **error);
static gboolean            gda_sqlite_provider_rollback_transaction (GdaServerProvider *provider, GdaConnection * cnc,
								     const gchar *name, GError **error);
static gboolean            gda_sqlite_provider_add_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
							      const gchar *name, GError **error);
static gboolean            gda_sqlite_provider_rollback_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
								   const gchar *name, GError **error);
static gboolean            gda_sqlite_provider_delete_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
								 const gchar *name, GError **error);

/* information retrieval */
static const gchar        *gda_sqlite_provider_get_version (GdaServerProvider *provider);
static gboolean            gda_sqlite_provider_supports (GdaServerProvider *provider, GdaConnection *cnc,
							 GdaConnectionFeature feature);

static const gchar        *gda_sqlite_provider_get_name (GdaServerProvider *provider);

static GdaDataHandler     *gda_sqlite_provider_get_data_handler (GdaServerProvider *provider, GdaConnection *cnc,
								 GType g_type, const gchar *dbms_type);

static const gchar*        gda_sqlite_provider_get_default_dbms_type (GdaServerProvider *provider, GdaConnection *cnc,
								      GType type);
/* statements */
static GdaSqlParser        *gda_sqlite_provider_create_parser (GdaServerProvider *provider, GdaConnection *cnc);
static gchar               *gda_sqlite_provider_statement_to_sql  (GdaServerProvider *provider, GdaConnection *cnc,
								   GdaStatement *stmt, GdaSet *params,
								   GdaStatementSqlFlag flags,
								   GSList **params_used, GError **error);
static gboolean             gda_sqlite_provider_statement_prepare (GdaServerProvider *provider, GdaConnection *cnc,
								   GdaStatement *stmt, GError **error);
static GObject             *gda_sqlite_provider_statement_execute (GdaServerProvider *provider, GdaConnection *cnc,
								   GdaStatement *stmt, GdaSet *params,
								   GdaStatementModelUsage model_usage,
								   GType *col_types, GdaSet **last_inserted_row,
								   guint *task_id, GdaServerProviderExecCallback async_cb,
								   gpointer cb_data, GError **error);
static GdaSqlStatement     *gda_sqlite_statement_rewrite          (GdaServerProvider *provider, GdaConnection *cnc,
								   GdaStatement *stmt, GdaSet *params, GError **error);

/* string escaping */
static gchar               *gda_sqlite_provider_escape_string (GdaServerProvider *provider, GdaConnection *cnc,
							       const gchar *string);
static gchar               *gda_sqlite_provider_unescape_string (GdaServerProvider *provider, GdaConnection *cnc,
								 const gchar *string);

/*
 * private connection data destroy
 */
static void gda_sqlite_free_cnc_data (SqliteConnectionData *cdata);

/*
 * extending SQLite with our own functions  and collations
 */
static void scalar_gda_file_exists_func (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_gda_hex_print_func (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_gda_hex_print_func2 (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_gda_hex_func (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_gda_hex_func2 (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_rmdiacr (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_lower (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_upper (sqlite3_context *context, int argc, sqlite3_value **argv);
typedef struct {
	char     *name;
	int       nargs;
	gpointer  user_data; /* retrieve it in func. implementations using sqlite3_user_data() */
	void    (*xFunc)(sqlite3_context*,int,sqlite3_value**);
} ScalarFunction;
static ScalarFunction scalars[] = {
	{"gda_file_exists", 1, NULL, scalar_gda_file_exists_func},
	{"gda_hex_print", 1, NULL, scalar_gda_hex_print_func},
	{"gda_hex_print", 2, NULL, scalar_gda_hex_print_func2},
	{"gda_hex", 1, NULL, scalar_gda_hex_func},
	{"gda_hex", 2, NULL, scalar_gda_hex_func2},
	{"gda_rmdiacr", 1, NULL, scalar_rmdiacr},
	{"gda_rmdiacr", 2, NULL, scalar_rmdiacr},
	{"gda_lower", 1, NULL, scalar_lower},
	{"gda_upper", 1, NULL, scalar_upper},
};

/* Regexp handling */
static void scalar_regexp_func (sqlite3_context *context, int argc, sqlite3_value **argv);
static void scalar_regexp_match_func (sqlite3_context *context, int argc, sqlite3_value **argv);

static ScalarFunction regexp_functions[] = {
	{"regexp", 2, NULL, scalar_regexp_func},
	{"regexp", 3, NULL, scalar_regexp_func},
	{"regexp_match", 2, NULL, scalar_regexp_match_func},
	{"regexp_match", 3, NULL, scalar_regexp_match_func}
};

/* Collations */
static int locale_collate_func (G_GNUC_UNUSED void *pArg, int nKey1, const void *pKey1,
				int nKey2, const void *pKey2);
static int dcase_collate_func (G_GNUC_UNUSED void *pArg, int nKey1, const void *pKey1,
			       int nKey2, const void *pKey2);
typedef struct {
	char     *name;
	int     (*xFunc)(void *, int, const void *, int, const void *);
} CollationFunction;
static CollationFunction collation_functions[] = {
	{"LOCALE", locale_collate_func},
	{"DCASE", dcase_collate_func}
};

/*
 * Prepared internal statements
 */
static GMutex init_mutex;
static GdaStatement **internal_stmt = NULL;

typedef enum {
	INTERNAL_PRAGMA_INDEX_LIST,
	INTERNAL_PRAGMA_INDEX_INFO,
	INTERNAL_PRAGMA_FK_LIST,
	INTERNAL_PRAGMA_TABLE_INFO,
	INTERNAL_SELECT_A_TABLE_ROW,
	INTERNAL_SELECT_ALL_TABLES,
	INTERNAL_SELECT_A_TABLE,
	INTERNAL_PRAGMA_PROC_LIST,
	INTERNAL_PRAGMA_EMPTY_RESULT,

	INTERNAL_BEGIN,
	INTERNAL_BEGIN_NAMED,
	INTERNAL_COMMIT,
	INTERNAL_COMMIT_NAMED,
	INTERNAL_ROLLBACK,
	INTERNAL_ROLLBACK_NAMED,

	INTERNAL_ADD_SAVEPOINT,
	INTERNAL_ROLLBACK_SAVEPOINT,
	INTERNAL_RELEASE_SAVEPOINT
} InternalStatementItem;

static gchar *internal_sql[] = {
	"PRAGMA index_list(##tblname::string)",
	"PRAGMA index_info(##idxname::string)",
	"PRAGMA foreign_key_list (##tblname::string)",
	"PRAGMA table_info (##tblname::string)",
	"SELECT * FROM ##tblname::string LIMIT 1",
	"SELECT name as 'Table', 'system' as 'Owner', ' ' as 'Description', sql as 'Definition' FROM (SELECT * FROM sqlite_master UNION ALL SELECT * FROM sqlite_temp_master) WHERE type = ##type::string AND name not like 'sqlite_%%' ORDER BY name",
	"SELECT name as 'Table', 'system' as 'Owner', ' ' as 'Description', sql as 'Definition' FROM (SELECT * FROM sqlite_master UNION ALL SELECT * FROM sqlite_temp_master) WHERE type = ##type::string AND name = ##tblname::string AND name not like 'sqlite_%%' ORDER BY name",
	"PRAGMA proc_list",
	"PRAGMA empty_result_callbacks = ON",

	"BEGIN TRANSACTION",
	"BEGIN TRANSACTION ##name::string",
	"COMMIT TRANSACTION",
	"COMMIT TRANSACTION ##name::string",
	"ROLLBACK TRANSACTION",
	"ROLLBACK TRANSACTION ##name::string",

	"SAVEPOINT ##name::string",
	"ROLLBACK TO ##name::string",
	"RELEASE ##name::string"
};

static gchar *
get_table_nth_column_name (GdaConnection *cnc, const gchar *table_name, gint pos)
{
	static GdaSet *params_set = NULL;
	GdaDataModel *model;
	gchar *fname = NULL;

	g_assert (table_name);
	params_set = gda_set_new_inline (1, "tblname", G_TYPE_STRING, table_name);
	model = gda_connection_statement_execute_select (cnc,
							 internal_stmt[INTERNAL_PRAGMA_TABLE_INFO],
							 params_set, NULL);
	g_object_unref (params_set);
	if (model) {
		const GValue *cvalue;
		cvalue = gda_data_model_get_value_at (model, 1, pos, NULL);
		if (cvalue)
			fname = g_value_dup_string (cvalue);
		g_object_unref (model);
	}
	return fname;
}

/*
 * GdaSqliteProvider class implementation
 */

static void
gda_sqlite_provider_class_init (GdaSqliteProviderClass *klass)
{
	GdaServerProviderClass *provider_class = GDA_SERVER_PROVIDER_CLASS (klass);

	parent_class = g_type_class_peek_parent (klass);

	provider_class->get_version = gda_sqlite_provider_get_version;
	provider_class->get_server_version = gda_sqlite_provider_get_server_version;
	provider_class->get_name = gda_sqlite_provider_get_name;
	provider_class->supports_feature = gda_sqlite_provider_supports;

	provider_class->get_data_handler = gda_sqlite_provider_get_data_handler;
	provider_class->get_def_dbms_type = gda_sqlite_provider_get_default_dbms_type;

	provider_class->create_connection = NULL;
	provider_class->identifier_quote = _gda_sqlite_identifier_quote;
	provider_class->open_connection = gda_sqlite_provider_open_connection;
	provider_class->close_connection = gda_sqlite_provider_close_connection;
	provider_class->get_database = gda_sqlite_provider_get_database;

	provider_class->supports_operation = gda_sqlite_provider_supports_operation;
        provider_class->create_operation = gda_sqlite_provider_create_operation;
        provider_class->render_operation = gda_sqlite_provider_render_operation;
        provider_class->perform_operation = gda_sqlite_provider_perform_operation;

	provider_class->begin_transaction = gda_sqlite_provider_begin_transaction;
	provider_class->commit_transaction = gda_sqlite_provider_commit_transaction;
	provider_class->rollback_transaction = gda_sqlite_provider_rollback_transaction;
	provider_class->add_savepoint = gda_sqlite_provider_add_savepoint;
	provider_class->rollback_savepoint = gda_sqlite_provider_rollback_savepoint;
	provider_class->delete_savepoint = gda_sqlite_provider_delete_savepoint;

	provider_class->create_parser = gda_sqlite_provider_create_parser;
	provider_class->statement_to_sql = gda_sqlite_provider_statement_to_sql;
	provider_class->statement_prepare = gda_sqlite_provider_statement_prepare;
	provider_class->statement_execute = gda_sqlite_provider_statement_execute;
	provider_class->statement_rewrite = gda_sqlite_statement_rewrite;

	provider_class->escape_string = gda_sqlite_provider_escape_string;
	provider_class->unescape_string = gda_sqlite_provider_unescape_string;

	memset (&(provider_class->meta_funcs), 0, sizeof (GdaServerProviderMeta));
	provider_class->meta_funcs._info = _gda_sqlite_meta__info;
	provider_class->meta_funcs._btypes = _gda_sqlite_meta__btypes;
	provider_class->meta_funcs._udt = _gda_sqlite_meta__udt;
	provider_class->meta_funcs.udt = _gda_sqlite_meta_udt;
	provider_class->meta_funcs._udt_cols = _gda_sqlite_meta__udt_cols;
	provider_class->meta_funcs.udt_cols = _gda_sqlite_meta_udt_cols;
	provider_class->meta_funcs._enums = _gda_sqlite_meta__enums;
	provider_class->meta_funcs.enums = _gda_sqlite_meta_enums;
	provider_class->meta_funcs._domains = _gda_sqlite_meta__domains;
	provider_class->meta_funcs.domains = _gda_sqlite_meta_domains;
	provider_class->meta_funcs._constraints_dom = _gda_sqlite_meta__constraints_dom;
	provider_class->meta_funcs.constraints_dom = _gda_sqlite_meta_constraints_dom;
	provider_class->meta_funcs._el_types = _gda_sqlite_meta__el_types;
	provider_class->meta_funcs.el_types = _gda_sqlite_meta_el_types;
	provider_class->meta_funcs._collations = _gda_sqlite_meta__collations;
	provider_class->meta_funcs.collations = _gda_sqlite_meta_collations;
	provider_class->meta_funcs._character_sets = _gda_sqlite_meta__character_sets;
	provider_class->meta_funcs.character_sets = _gda_sqlite_meta_character_sets;
	provider_class->meta_funcs._schemata = _gda_sqlite_meta__schemata;
	provider_class->meta_funcs.schemata = _gda_sqlite_meta_schemata;
	provider_class->meta_funcs._tables_views = _gda_sqlite_meta__tables_views;
	provider_class->meta_funcs.tables_views = _gda_sqlite_meta_tables_views;
	provider_class->meta_funcs._columns = _gda_sqlite_meta__columns;
	provider_class->meta_funcs.columns = _gda_sqlite_meta_columns;
	provider_class->meta_funcs._view_cols = _gda_sqlite_meta__view_cols;
	provider_class->meta_funcs.view_cols = _gda_sqlite_meta_view_cols;
	provider_class->meta_funcs._constraints_tab = _gda_sqlite_meta__constraints_tab;
	provider_class->meta_funcs.constraints_tab = _gda_sqlite_meta_constraints_tab;
	provider_class->meta_funcs._constraints_ref = _gda_sqlite_meta__constraints_ref;
	provider_class->meta_funcs.constraints_ref = _gda_sqlite_meta_constraints_ref;
	provider_class->meta_funcs._key_columns = _gda_sqlite_meta__key_columns;
	provider_class->meta_funcs.key_columns = _gda_sqlite_meta_key_columns;
	provider_class->meta_funcs._check_columns = _gda_sqlite_meta__check_columns;
	provider_class->meta_funcs.check_columns = _gda_sqlite_meta_check_columns;
	provider_class->meta_funcs._triggers = _gda_sqlite_meta__triggers;
	provider_class->meta_funcs.triggers = _gda_sqlite_meta_triggers;
	provider_class->meta_funcs._routines = _gda_sqlite_meta__routines;
	provider_class->meta_funcs.routines = _gda_sqlite_meta_routines;
	provider_class->meta_funcs._routine_col = _gda_sqlite_meta__routine_col;
	provider_class->meta_funcs.routine_col = _gda_sqlite_meta_routine_col;
	provider_class->meta_funcs._routine_par = _gda_sqlite_meta__routine_par;
	provider_class->meta_funcs.routine_par = _gda_sqlite_meta_routine_par;
	provider_class->meta_funcs._indexes_tab = _gda_sqlite_meta__indexes_tab;
        provider_class->meta_funcs.indexes_tab = _gda_sqlite_meta_indexes_tab;
        provider_class->meta_funcs._index_cols = _gda_sqlite_meta__index_cols;
        provider_class->meta_funcs.index_cols = _gda_sqlite_meta_index_cols;

	/* SQLite doe not support distributed transactions */
	provider_class->xa_funcs = NULL;

	/* If SQLite was not compiled with the SQLITE_THREADSAFE flag, then it is not
	 * considered thread safe, and we limit the usage of the provider from the current thread */
	if (! SQLITE3_CALL (sqlite3_threadsafe) ()) {
		gda_log_message ("SQLite was not compiled with the SQLITE_THREADSAFE flag, "
				 "only one thread can access the provider");
		provider_class->limiting_thread = GDA_SERVER_PROVIDER_UNDEFINED_LIMITING_THREAD;
	}
	else
		provider_class->limiting_thread = NULL;
}

static void
gda_sqlite_provider_init (GdaSqliteProvider *sqlite_prv, G_GNUC_UNUSED GdaSqliteProviderClass *klass)
{
	g_mutex_lock (&init_mutex);

	if (!internal_stmt) {
		/* configure multi threading environment */
		SQLITE3_CALL (sqlite3_config) (SQLITE_CONFIG_SERIALIZED);

		InternalStatementItem i;
		GdaSqlParser *parser;
		parser = gda_server_provider_internal_get_parser ((GdaServerProvider*) sqlite_prv);

		internal_stmt = g_new0 (GdaStatement *, sizeof (internal_sql) / sizeof (gchar*));
		for (i = INTERNAL_PRAGMA_INDEX_LIST; i < sizeof (internal_sql) / sizeof (gchar*); i++) {
			internal_stmt[i] = gda_sql_parser_parse_string (parser, internal_sql[i], NULL, NULL);
			if (!internal_stmt[i])
				g_error ("Could not parse internal statement: %s\n", internal_sql[i]);
		}
	}

	/* meta data init */
	_gda_sqlite_provider_meta_init ((GdaServerProvider*) sqlite_prv);

	g_mutex_unlock (&init_mutex);
}

GType
gda_sqlite_provider_get_type (void)
{
	static GType type = 0;

	if (G_UNLIKELY (type == 0)) {
		static GMutex registering;
		static GTypeInfo info = {
			sizeof (GdaSqliteProviderClass),
			(GBaseInitFunc) NULL,
			(GBaseFinalizeFunc) NULL,
			(GClassInitFunc) gda_sqlite_provider_class_init,
			NULL, NULL,
			sizeof (GdaSqliteProvider),
			0,
			(GInstanceInitFunc) gda_sqlite_provider_init,
			0
		};
		g_mutex_lock (&registering);
		if (type == 0) {
#ifdef WITH_BDBSQLITE
			type = g_type_register_static (GDA_TYPE_SERVER_PROVIDER, CLASS_PREFIX "Provider", &info, 0);
#else
  #ifdef STATIC_SQLITE
			type = g_type_register_static (GDA_TYPE_SERVER_PROVIDER, CLASS_PREFIX "Provider", &info, 0);
  #else
    #ifdef HAVE_SQLITE
			GModule *module2;

			module2 = find_sqlite_library ("libsqlite3");
			if (module2)
				load_symbols (module2);
			if (s3r)
				type = g_type_register_static (GDA_TYPE_SERVER_PROVIDER, CLASS_PREFIX "Provider", &info, 0);
			else
				g_warning (_("Can't find libsqlite3." G_MODULE_SUFFIX " file."));
    #else
			type = g_type_register_static (GDA_TYPE_SERVER_PROVIDER, CLASS_PREFIX "Provider", &info, 0);
    #endif
  #endif
#endif
		}
		g_mutex_unlock (&registering);
	}

	return type;
}

/*
 * Get provider name request
 */
static const gchar *
gda_sqlite_provider_get_name (G_GNUC_UNUSED GdaServerProvider *provider)
{
	return PNAME;
}

/*
 * Get provider's version
 */
static const gchar *
gda_sqlite_provider_get_version (G_GNUC_UNUSED GdaServerProvider *provider)
{
	return PACKAGE_VERSION;
}

typedef enum {
	CASE_UP,
	CASE_DOWN,
	CASE_UNCHANGED
} CaseModif;

gchar *
remove_diacritics_and_change_case (const gchar *str, gssize len, CaseModif cmod)
{
	gchar *retval = NULL;

	if (str) {
		GString* string;
		gchar *normstr, *ptr;

		normstr = g_utf8_normalize (str, len, G_NORMALIZE_NFD);
		string = g_string_new ("");
		ptr = normstr;
		while (ptr) {
			gunichar c;
			c = g_utf8_get_char (ptr);
			if (c != '\0') {
				if (!g_unichar_ismark(c)) {
					switch (cmod) {
					case CASE_UP:
						c = g_unichar_toupper (c);
						break;
					case CASE_DOWN:
						c = g_unichar_tolower (c);
						break;
					case CASE_UNCHANGED:
						break;
					}
					g_string_append_unichar (string, c);
				}
				ptr = g_utf8_next_char (ptr);
			}
			else
				break;
		}

		retval = g_string_free (string, FALSE);
		g_free (normstr);
	}

	return retval;
}


/*
 * Open connection request
 */
static gboolean
gda_sqlite_provider_open_connection (GdaServerProvider *provider, GdaConnection *cnc,
				     GdaQuarkList *params, G_GNUC_UNUSED GdaQuarkList *auth,
				     G_GNUC_UNUSED guint *task_id, GdaServerProviderAsyncCallback async_cb, G_GNUC_UNUSED gpointer cb_data)
{
	gchar *filename = NULL;
	const gchar *dirname = NULL, *dbname = NULL;
	const gchar *is_virtual = NULL;
	const gchar *append_extension = NULL;
	const gchar *use_extra_functions = NULL, *with_fk = NULL, *regexp, *locale_collate, *extensions;
	gint errmsg;
	SqliteConnectionData *cdata;
	gchar *dup = NULL;
	static GMutex cnc_mutex;
#ifdef SQLITE_HAS_CODEC
	const gchar *passphrase = NULL;
#endif

	g_return_val_if_fail (GDA_IS_SQLITE_PROVIDER (provider), FALSE);
	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);

	if (async_cb) {
		gda_connection_add_event_string (cnc, _("Provider does not support asynchronous connection open"));
                return FALSE;
	}

	g_mutex_lock (&cnc_mutex);

	/* get all parameters received */
	dirname = gda_quark_list_find (params, "DB_DIR");
	if (!dirname)
		dirname="."; /* default to current directory */
	dbname = gda_quark_list_find (params, "DB_NAME");
	append_extension = gda_quark_list_find (params, "APPEND_DB_EXTENSION");
	is_virtual = gda_quark_list_find (params, "_IS_VIRTUAL");
	with_fk = gda_quark_list_find (params, "FK");
	use_extra_functions = gda_quark_list_find (params, "EXTRA_FUNCTIONS");
	if (!use_extra_functions)
		use_extra_functions = gda_quark_list_find (params, "LOAD_GDA_FUNCTIONS");

	regexp = gda_quark_list_find (params, "REGEXP");
	locale_collate = gda_quark_list_find (params, "EXTRA_COLLATIONS");
	extensions = gda_quark_list_find (params, "EXTENSIONS");

	if (! is_virtual) {
		if (!dbname) {
			const gchar *str;

			str = gda_quark_list_find (params, "URI");
			if (!str) {
				gda_connection_add_event_string (cnc,
								 _("The connection string must contain DB_DIR and DB_NAME values"));
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}
			else {
				gint len = strlen (str);
				gint elen = strlen (FILE_EXTENSION);

				if (g_str_has_suffix (str, FILE_EXTENSION)) {
					gchar *ptr;

					dup = g_strdup (str);
					dup [len-elen] = 0;
					for (ptr = dup + (len - elen - 1); (ptr >= dup) && (*ptr != G_DIR_SEPARATOR); ptr--);
					dbname = ptr;
					if (*ptr == G_DIR_SEPARATOR)
						dbname ++;

					if ((*ptr == G_DIR_SEPARATOR) && (ptr > dup)) {
						dirname = dup;
						while ((ptr >= dup) && (*ptr != G_DIR_SEPARATOR))
							ptr--;
						*ptr = 0;
					}
				}
				if (!dbname) {
					gda_connection_add_event_string (cnc,
									 _("The connection string format has changed: replace URI with "
									   "DB_DIR (the path to the database file) and DB_NAME "
									   "(the database file without the '%s' at the end)."), FILE_EXTENSION);
					g_free (dup);
					g_mutex_unlock (&cnc_mutex);
					return FALSE;
				}
				else
					g_warning (_("The connection string format has changed: replace URI with "
						     "DB_DIR (the path to the database file) and DB_NAME "
						     "(the database file without the '%s' at the end)."), FILE_EXTENSION);
			}
		}

		if (! g_ascii_strcasecmp (dbname,":memory:"))
			/* we have an in memory database */
			filename = g_strdup (":memory:");
		else if (! g_ascii_strcasecmp (dbname,"__gda_tmp"))
			/* we have an in memory database */
			filename = NULL/*g_strdup ("")*/;
		else {
			if (!g_file_test (dirname, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR)) {
				gda_connection_add_event_string (cnc,
								 _("The DB_DIR part of the connection string must point "
								   "to a valid directory"));
				g_free (dup);
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}

			/* try first with the file extension */
			gchar *tmp, *f1, *f2;
			if (!append_extension ||
			    (append_extension && ((*append_extension == 't') || (*append_extension == 'T'))))
				tmp = g_strdup_printf ("%s%s", dbname, FILE_EXTENSION);
			else
				tmp = g_strdup (dbname);
			f1 = g_build_filename (dirname, tmp, NULL);
			g_free (tmp);
			f2 = g_build_filename (dirname, dbname, NULL);
			if (g_file_test (f1, G_FILE_TEST_EXISTS)) {
				filename = f1;
				f1 = NULL;
			}
			else if (g_file_test (f2, G_FILE_TEST_EXISTS)) {
				filename = f2;
				f2 = NULL;
			}
			else {
				filename = f1;
				f1 = NULL;
			}
			g_free (f1);
			g_free (f2);
			g_free (dup);
		}
	}

	cdata = g_new0 (SqliteConnectionData, 1);
	cdata->gdacnc = cnc;
	g_object_add_weak_pointer (G_OBJECT (cnc), (gpointer*) &(cdata->gdacnc));

	if (filename)
		cdata->file = filename;

	errmsg = SQLITE3_CALL (sqlite3_open) (filename, &cdata->connection);

	if (errmsg != SQLITE_OK) {
		gda_connection_add_event_string (cnc, SQLITE3_CALL (sqlite3_errmsg) (cdata->connection));
		gda_sqlite_free_cnc_data (cdata);

		g_mutex_unlock (&cnc_mutex);
		return FALSE;
	}

#ifdef SQLITE_HAS_CODEC
  /* TODO Fix this compiler warning: the address of 'sqlite3_key' will always evaluate as 'true' */
  /* We disable this warning in the meantime with -Wno-address */

	if (auth)
		passphrase = gda_quark_list_find (auth, "PASSWORD");

	if (passphrase && *passphrase && SQLITE3_CALL (sqlite3_key)) {
		errmsg = SQLITE3_CALL (sqlite3_key) (cdata->connection, (void*) passphrase, strlen (passphrase));
		if (errmsg != SQLITE_OK) {
			gda_connection_add_event_string (cnc, _("Wrong encryption passphrase"));
			gda_sqlite_free_cnc_data (cdata);
			g_mutex_unlock (&cnc_mutex);
			return FALSE;
		}
	}
#endif

	gda_connection_internal_set_provider_data (cnc, cdata, (GDestroyNotify) gda_sqlite_free_cnc_data);

	/* use extended result codes */
	SQLITE3_CALL (sqlite3_extended_result_codes) (cdata->connection, 1);

	/* allow a busy timeout of 500 ms */
	SQLITE3_CALL (sqlite3_busy_timeout) (cdata->connection, 500);

	/* allow loading extensions using SELECT load_extension ()... */
	if (extensions && ((*extensions == 't') || (*extensions == 'T'))) {
		if (SQLITE3_CALL (sqlite3_enable_load_extension))
			SQLITE3_CALL (sqlite3_enable_load_extension) (cdata->connection, 1);
		else {
			gda_connection_add_event_string (cnc, _("Extension loading is not supported"));
			gda_sqlite_free_cnc_data (cdata);
			g_mutex_unlock (&cnc_mutex);
			return FALSE;
		}
	}

	/* try to prepare all the internal statements */
	InternalStatementItem i;
	for (i = INTERNAL_PRAGMA_INDEX_LIST; i < sizeof (internal_sql) / sizeof (gchar*); i++)
		gda_connection_statement_prepare (cnc, internal_stmt[i], NULL);

	/* set SQLite library options */
	GObject *obj;
	GError *lerror = NULL;
	obj = gda_connection_statement_execute (cnc, internal_stmt[INTERNAL_PRAGMA_EMPTY_RESULT],
						NULL, GDA_STATEMENT_MODEL_RANDOM_ACCESS, NULL, &lerror);
	if (!obj) {
		gda_connection_add_event_string (cnc,
						 _("Could not set empty_result_callbacks SQLite option: %s"),
						 lerror && lerror->message ? lerror->message : _("no detail"));
		g_clear_error (&lerror);
	}
	else
		g_object_unref (obj);

	/* make sure the internals are completely initialized now */
	{
		gchar **data = NULL;
		gint ncols;
		gint nrows;
		gint status;
		gchar *errmsg;

		status = SQLITE3_CALL (sqlite3_get_table) (cdata->connection, "SELECT name"
							   " FROM (SELECT * FROM sqlite_master UNION ALL "
							   "       SELECT * FROM sqlite_temp_master)",
							   &data,
							   &nrows,
							   &ncols,
							   &errmsg);
		if (status == SQLITE_OK)
			SQLITE3_CALL (sqlite3_free_table) (data);
		else {
			gda_connection_add_event_string (cnc, errmsg);
			SQLITE3_CALL (sqlite3_free) (errmsg);
			gda_sqlite_free_cnc_data (cdata);
			gda_connection_internal_set_provider_data (cnc, NULL, (GDestroyNotify) gda_sqlite_free_cnc_data);
			g_mutex_unlock (&cnc_mutex);
			return FALSE;
		}
	}

	/* set connection parameters */
	gboolean enforce_fk = TRUE;
	if (with_fk && ((*with_fk == 'f') || (*with_fk == 'F')))
		enforce_fk = FALSE;
	int res;
	sqlite3_stmt *pStmt;
	if (enforce_fk)
		res = SQLITE3_CALL (sqlite3_prepare) (cdata->connection,
						      "PRAGMA foreign_keys = ON", -1,
						      &pStmt, NULL);
	else
		res = SQLITE3_CALL (sqlite3_prepare) (cdata->connection,
						      "PRAGMA foreign_keys = OFF", -1,
						      &pStmt, NULL);

	if (res != SQLITE_OK) {
		if (with_fk) {
			gda_sqlite_free_cnc_data (cdata);
			gda_connection_internal_set_provider_data (cnc, NULL,
							(GDestroyNotify) gda_sqlite_free_cnc_data);
			g_mutex_unlock (&cnc_mutex);
			return FALSE;
		}
	}
	else {
		res = SQLITE3_CALL (sqlite3_step) (pStmt);
		SQLITE3_CALL (sqlite3_reset) (pStmt);
		SQLITE3_CALL (sqlite3_finalize) (pStmt);
		if (res != SQLITE_DONE) {
			if (with_fk) {
				gda_sqlite_free_cnc_data (cdata);
				gda_connection_internal_set_provider_data (cnc, NULL,
							(GDestroyNotify) gda_sqlite_free_cnc_data);
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}
		}
#ifdef GDA_DEBUG_NO
		else {
			if (enforce_fk)
				g_print ("SQLite provider enforces foreign keys.\n");
			else
				g_print ("SQLite provider does not enforce foreign keys.\n");
		}
#endif
	}

	if (!use_extra_functions || ((*use_extra_functions == 't') || (*use_extra_functions == 'T'))) {
		gsize i;

		for (i = 0; i < sizeof (scalars) / sizeof (ScalarFunction); i++) {
			ScalarFunction *func = (ScalarFunction *) &(scalars [i]);
			gint res = SQLITE3_CALL (sqlite3_create_function) (cdata->connection,
									   func->name, func->nargs,
									   SQLITE_UTF8, func->user_data,
									   func->xFunc, NULL, NULL);
			if (res != SQLITE_OK) {
				gda_connection_add_event_string (cnc, _("Could not register function '%s'"),
								 func->name);
				gda_sqlite_free_cnc_data (cdata);
				gda_connection_internal_set_provider_data (cnc, NULL, (GDestroyNotify) gda_sqlite_free_cnc_data);
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}
		}
	}

	if (!regexp || ((*regexp == 't') || (*regexp == 'T'))) {
		gsize i;

		for (i = 0; i < sizeof (regexp_functions) / sizeof (ScalarFunction); i++) {
			ScalarFunction *func = (ScalarFunction *) &(regexp_functions [i]);
			gint res = SQLITE3_CALL (sqlite3_create_function) (cdata->connection,
									   func->name, func->nargs,
									   SQLITE_UTF8, func->user_data,
									   func->xFunc, NULL, NULL);
			if (res != SQLITE_OK) {
				gda_connection_add_event_string (cnc, _("Could not register function '%s'"),
								 func->name);
				gda_sqlite_free_cnc_data (cdata);
				gda_connection_internal_set_provider_data (cnc, NULL, (GDestroyNotify) gda_sqlite_free_cnc_data);
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}
		}
	}

	if (! locale_collate || ((*locale_collate == 't') || (*locale_collate == 'T'))) {
		gsize i;
		for (i = 0; i < sizeof (collation_functions) / sizeof (CollationFunction); i++) {
			CollationFunction *func = (CollationFunction*) &(collation_functions [i]);
			gint res;
			res = SQLITE3_CALL (sqlite3_create_collation) (cdata->connection, func->name,
								       SQLITE_UTF8, NULL, func->xFunc);
			if (res != SQLITE_OK) {
				gda_connection_add_event_string (cnc,
								 _("Could not define the %s collation"),
								 func->name);
				gda_sqlite_free_cnc_data (cdata);
				gda_connection_internal_set_provider_data (cnc, NULL, (GDestroyNotify) gda_sqlite_free_cnc_data);
				g_mutex_unlock (&cnc_mutex);
				return FALSE;
			}
		}
	}

	if (SQLITE3_CALL (sqlite3_threadsafe) ())
		g_object_set (G_OBJECT (cnc), "thread-owner", NULL, NULL);
	else
		g_object_set (G_OBJECT (cnc), "thread-owner", g_thread_self (), NULL);

	g_mutex_unlock (&cnc_mutex);
	return TRUE;
}

static int
locale_collate_func (G_GNUC_UNUSED void *pArg,
		     int nKey1, const void *pKey1,
		     int nKey2, const void *pKey2)
{
	gchar *tmp1, *tmp2;
	int res;
	tmp1 = g_utf8_collate_key ((gchar*) pKey1, nKey1);
	tmp2 = g_utf8_collate_key ((gchar*) pKey2, nKey2);
	res = strcmp (tmp1, tmp2);
	g_free (tmp1);
	g_free (tmp2);
	return res;
}

static int
dcase_collate_func (G_GNUC_UNUSED void *pArg,
		    int nKey1, const void *pKey1,
		    int nKey2, const void *pKey2)
{
	gchar *tmp1, *tmp2;
	int res;
	tmp1 = remove_diacritics_and_change_case ((gchar*) pKey1, nKey1, CASE_DOWN);
	tmp2 = remove_diacritics_and_change_case ((gchar*) pKey2, nKey2, CASE_DOWN);
	res = strcmp (tmp1, tmp2);
	g_free (tmp1);
	g_free (tmp2);
	return res;
}

/*
 * Close connection request
 */
static gboolean
gda_sqlite_provider_close_connection (GdaServerProvider *provider, GdaConnection *cnc)
{
	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);

	/* nothing specific to do: sqlite3_close() is called when SqliteConnectionData is destroyed */
	return TRUE;
}

/*
 * Server version request
 */
static const gchar *
gda_sqlite_provider_get_server_version (GdaServerProvider *provider, GdaConnection *cnc)
{
	static GMutex mutex;
	static gchar *version_string = NULL;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);

	g_mutex_lock (&mutex);
	if (!version_string)
		version_string = g_strdup_printf ("SQLite version %s", SQLITE_VERSION);
	g_mutex_unlock (&mutex);

	return (const gchar *) version_string;
}

/*
 * Get database request
 */
static const gchar *
gda_sqlite_provider_get_database (GdaServerProvider *provider, GdaConnection *cnc)
{
	SqliteConnectionData *cdata;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);

	cdata = (SqliteConnectionData*) gda_connection_internal_get_provider_data (cnc);
	if (!cdata)
		return NULL;
	return cdata->file;
}

/*
 * Support operation request
 */
static gboolean
gda_sqlite_provider_supports_operation (G_GNUC_UNUSED GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc,
					GdaServerOperationType type, G_GNUC_UNUSED GdaSet *options)
{
        switch (type) {
        case GDA_SERVER_OPERATION_CREATE_DB:
        case GDA_SERVER_OPERATION_DROP_DB:

        case GDA_SERVER_OPERATION_CREATE_TABLE:
        case GDA_SERVER_OPERATION_DROP_TABLE:
        case GDA_SERVER_OPERATION_RENAME_TABLE:

        case GDA_SERVER_OPERATION_ADD_COLUMN:

        case GDA_SERVER_OPERATION_CREATE_INDEX:
        case GDA_SERVER_OPERATION_DROP_INDEX:

        case GDA_SERVER_OPERATION_CREATE_VIEW:
        case GDA_SERVER_OPERATION_DROP_VIEW:
		return TRUE;
        default:
                return FALSE;
        }
}

/*
 * Create operation request
 */
static GdaServerOperation *
gda_sqlite_provider_create_operation (GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc,
				      GdaServerOperationType type,
				      G_GNUC_UNUSED GdaSet *options, GError **error)
{
        gchar *file;
        GdaServerOperation *op;
        gchar *str;
	gchar *dir;

        file = g_strdup_printf (PNAME "_specs_%s.xml", gda_server_operation_op_type_to_string (type));
        str = g_utf8_strdown (file, -1);
        g_free (file);

	dir = gda_gbr_get_file_path (GDA_DATA_DIR, LIBGDA_ABI_NAME, NULL);
        file = gda_server_provider_find_file (provider, dir, str);
	g_free (dir);

        if (! file) {
		const gchar *contents;
		contents = emb_get_file (str);
		if (contents) {
			op = _gda_server_operation_new_from_string (type, contents);
			return op;
		}
		else {
			g_set_error (error, GDA_SERVER_OPERATION_ERROR,
				     GDA_SERVER_OPERATION_XML_ERROR,
				     _("Missing spec. file '%s'"), str);
			g_free (str);
			return NULL;
		}
        }

        g_free (str);

        op = gda_server_operation_new (type, file);
        g_free (file);

        return op;
}

/*
 * Render operation request
 */
static gchar *
gda_sqlite_provider_render_operation (GdaServerProvider *provider, GdaConnection *cnc,
				      GdaServerOperation *op, GError **error)
{
        gchar *sql = NULL;
        gchar *file;
        gchar *str;
	gchar *dir;

	/* test @op's validity */
	file = g_strdup_printf (PNAME "_specs_%s.xml",
				gda_server_operation_op_type_to_string (gda_server_operation_get_op_type (op)));
        str = g_utf8_strdown (file, -1);
        g_free (file);

	dir = gda_gbr_get_file_path (GDA_DATA_DIR, LIBGDA_ABI_NAME, NULL);
        file = gda_server_provider_find_file (provider, dir, str);
	g_free (dir);

        if (! file) {
		const gchar *contents;
		contents = emb_get_file (str);
		if (!contents) {
			g_set_error (error, GDA_SERVER_OPERATION_ERROR,
				     GDA_SERVER_OPERATION_XML_ERROR,
				     _("Missing spec. file '%s'"), str);
			g_free (str);
			return NULL;
		}
		/* else: TO_IMPLEMENT */
        }
	else {
		g_free (str);
		if (!gda_server_operation_is_valid (op, file, error)) {
			g_free (file);
			return NULL;
		}
		g_free (file);
	}

	/* actual rendering */
        switch (gda_server_operation_get_op_type (op)) {
        case GDA_SERVER_OPERATION_CREATE_DB:
        case GDA_SERVER_OPERATION_DROP_DB:
		sql = NULL;
                break;
        case GDA_SERVER_OPERATION_CREATE_TABLE:
                sql = _gda_sqlite_render_CREATE_TABLE (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_DROP_TABLE:
                sql = _gda_sqlite_render_DROP_TABLE (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_RENAME_TABLE:
                sql = _gda_sqlite_render_RENAME_TABLE (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_ADD_COLUMN:
                sql = _gda_sqlite_render_ADD_COLUMN (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_CREATE_INDEX:
                sql = _gda_sqlite_render_CREATE_INDEX (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_DROP_INDEX:
                sql = _gda_sqlite_render_DROP_INDEX (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_CREATE_VIEW:
                sql = _gda_sqlite_render_CREATE_VIEW (provider, cnc, op, error);
                break;
        case GDA_SERVER_OPERATION_DROP_VIEW:
                sql = _gda_sqlite_render_DROP_VIEW (provider, cnc, op, error);
                break;

        default:
                g_assert_not_reached ();
        }
        return sql;
}

/*
 * Perform operation request
 */
static gboolean
gda_sqlite_provider_perform_operation (GdaServerProvider *provider, GdaConnection *cnc,
                                      GdaServerOperation *op, G_GNUC_UNUSED guint *task_id, GdaServerProviderAsyncCallback async_cb,
				       G_GNUC_UNUSED gpointer cb_data, GError **error)
{
        GdaServerOperationType optype;

	if (async_cb) {
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
			      "%s", _("Provider does not support asynchronous server operation"));
                return FALSE;
	}

        optype = gda_server_operation_get_op_type (op);
	switch (optype) {
	case GDA_SERVER_OPERATION_CREATE_DB: {
		const GValue *value;
		const gchar *dbname = NULL, *append_extension = NULL;
		const gchar *dir = NULL;
		SqliteConnectionData *cdata;
		gint errmsg;
		gchar *filename, *tmp;
		gboolean retval = TRUE;

		value = gda_server_operation_get_value_at (op, "/DB_DEF_P/DB_NAME");
                if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) && g_value_get_string (value))
                        dbname = g_value_get_string (value);
		value = gda_server_operation_get_value_at (op, "/DB_DEF_P/APPEND_DB_EXTENSION");
                if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) && g_value_get_string (value))
                        append_extension = g_value_get_string (value);
		value = gda_server_operation_get_value_at (op, "/DB_DEF_P/DB_DIR");
                if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) && g_value_get_string (value))
                        dir = g_value_get_string (value);

		if (!append_extension ||
		    (append_extension && ((*append_extension == 't') || (*append_extension == 'T'))))
			tmp = g_strdup_printf ("%s%s", dbname, FILE_EXTENSION);
		else
			tmp = g_strdup (dbname);
		filename = g_build_filename (dir, tmp, NULL);
		g_free (tmp);

		cdata = g_new0 (SqliteConnectionData, 1);
		errmsg = SQLITE3_CALL (sqlite3_open) (filename, &cdata->connection);
		g_free (filename);

		if (errmsg != SQLITE_OK) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR,
				     "%s", SQLITE3_CALL (sqlite3_errmsg) (cdata->connection));
			retval = FALSE;
		}

#ifdef SQLITE_HAS_CODEC
		value = gda_server_operation_get_value_at (op, "/DB_DEF_P/PASSWORD");
		if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) &&
		    g_value_get_string (value) &&
		    *g_value_get_string (value) &&
		    SQLITE3_CALL (sqlite3_key)) {
			const gchar *passphrase = g_value_get_string (value);
			errmsg = SQLITE3_CALL (sqlite3_key) (cdata->connection, (void*) passphrase,
							     strlen (passphrase));
			if (errmsg != SQLITE_OK) {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
					     "%s", SQLITE3_CALL (sqlite3_errmsg) (cdata->connection));
				retval = FALSE;
			}
			else {
				/* create some contents */
				int res;
				sqlite3_stmt *pStmt;
				res = SQLITE3_CALL (sqlite3_prepare) (cdata->connection,
								      "CREATE TABLE data (id int)", -1,
								      &pStmt, NULL);

				if (res != SQLITE_OK) {
					g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
						     "%s",
						     _("Error initializing database with passphrase"));
					retval = FALSE;
					goto outcontents;
				}
				res = SQLITE3_CALL (sqlite3_step) (pStmt);
				SQLITE3_CALL (sqlite3_reset) (pStmt);
				SQLITE3_CALL (sqlite3_finalize) (pStmt);
				if (res != SQLITE_DONE) {
					g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
						     "%s",
						     _("Error initializing database with passphrase"));
					retval = FALSE;
					goto outcontents;
					/* end */
				}

				res = SQLITE3_CALL (sqlite3_prepare) (cdata->connection,
								      "DROP TABLE data", -1,
								      &pStmt, NULL);

				if (res != SQLITE_OK) {
					g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
						     "%s",
						     _("Error initializing database with passphrase"));
					retval = FALSE;
					goto outcontents;
				}
				res = SQLITE3_CALL (sqlite3_step) (pStmt);
				SQLITE3_CALL (sqlite3_reset) (pStmt);
				SQLITE3_CALL (sqlite3_finalize) (pStmt);
				if (res != SQLITE_DONE) {
					g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
						     "%s",
						     _("Error initializing database with passphrase"));
					retval = FALSE;
					goto outcontents;
					/* end */
				}
			outcontents:
				;
			}
		}
#endif
		gda_sqlite_free_cnc_data (cdata);

		return retval;
        }
	case GDA_SERVER_OPERATION_DROP_DB: {
		const GValue *value;
		const gchar *dbname = NULL;
		const gchar *dir = NULL;
		gboolean retval = TRUE;

		value = gda_server_operation_get_value_at (op, "/DB_DESC_P/DB_NAME");
                if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) && g_value_get_string (value))
                        dbname = g_value_get_string (value);
		value = gda_server_operation_get_value_at (op, "/DB_DESC_P/DB_DIR");
                if (value && G_VALUE_HOLDS (value, G_TYPE_STRING) && g_value_get_string (value))
                        dir = g_value_get_string (value);

		if (dbname && dir) {
			gchar *filename, *tmp;
			tmp = g_strdup_printf ("%s%s", dbname, FILE_EXTENSION);
			filename = (gchar *) g_build_filename (dir, tmp, NULL);
			g_free (tmp);

			if (g_unlink (filename)) {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_OPERATION_ERROR,
					      "%s", g_strerror (errno));
				retval = FALSE;
			}
			g_free (filename);
		}
		else {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_OPERATION_ERROR,
				      "%s", _("Missing database name or directory"));
			retval = FALSE;
		}

		return retval;
	}
        default:
                /* use the SQL from the provider to perform the action */
		return gda_server_provider_perform_operation_default (provider, cnc, op, error);
	}
}

/*
 * Begin transaction request
 */
static gboolean
gda_sqlite_provider_begin_transaction (GdaServerProvider *provider, GdaConnection *cnc,
				       const gchar *name, G_GNUC_UNUSED GdaTransactionIsolation level,
				       GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);

	if (gda_connection_get_options (cnc) & GDA_CONNECTION_OPTIONS_READ_ONLY) {
		gda_connection_add_event_string (cnc, _("Transactions are not supported in read-only mode"));
		return FALSE;
	}

	if (name) {
		static GMutex mutex;
		static GdaSet *params_set = NULL;
		g_mutex_lock (&mutex);
		if (!params_set)
			params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
		else if (! gda_set_set_holder_value (params_set, error, "name", name))
			status = FALSE;
		if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_BEGIN_NAMED],
									   params_set, NULL, error) == -1)
			status = FALSE;
		g_mutex_unlock (&mutex);
	}
	else {
		if (gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_BEGIN],
								 NULL, NULL, error) == -1)
			status = FALSE;
	}

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

/*
 * Commit transaction request
 */
static gboolean
gda_sqlite_provider_commit_transaction (GdaServerProvider *provider, GdaConnection *cnc,
					const gchar *name, GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);

	if (name) {
		static GMutex mutex;
		static GdaSet *params_set = NULL;
		g_mutex_lock (&mutex);
		if (!params_set)
			params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
		else if (!gda_set_set_holder_value (params_set, error, "name", name))
			status = FALSE;
		if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_COMMIT_NAMED],
									   params_set, NULL, error) == -1)
			status = FALSE;
		g_mutex_unlock (&mutex);
	}
	else {
		if (gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_COMMIT],
								 NULL, NULL, error) == -1)
			status = FALSE;
	}

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

/*
 * Rollback transaction request
 */
static gboolean
gda_sqlite_provider_rollback_transaction (GdaServerProvider *provider,
					  GdaConnection *cnc,
					  const gchar *name, GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);

	if (name) {
		static GMutex mutex;
		static GdaSet *params_set = NULL;
		g_mutex_lock (&mutex);
		if (!params_set)
			params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
		else if (! gda_set_set_holder_value (params_set, error, "name", name))
			status = FALSE;
		if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_ROLLBACK_NAMED],
									   params_set, NULL, error) == -1)
			status = FALSE;
		g_mutex_unlock (&mutex);
	}
	else {
		if (gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_ROLLBACK],
								 NULL, NULL, error) == -1)
			status = FALSE;
	}

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

static gboolean
gda_sqlite_provider_add_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
				   const gchar *name, GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	g_return_val_if_fail (name && *name, FALSE);

	static GMutex mutex;
	static GdaSet *params_set = NULL;
	g_mutex_lock (&mutex);
	if (!params_set)
		params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
	else if (! gda_set_set_holder_value (params_set, error, "name", name))
		status = FALSE;
	if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_ADD_SAVEPOINT],
								   params_set, NULL, error) == -1)
		status = FALSE;
	g_mutex_unlock (&mutex);

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

static gboolean
gda_sqlite_provider_rollback_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
					const gchar *name, GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	g_return_val_if_fail (name && *name, FALSE);

	static GMutex mutex;
	static GdaSet *params_set = NULL;
	g_mutex_lock (&mutex);
	if (!params_set)
		params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
	else if (! gda_set_set_holder_value (params_set, error, "name", name))
		status = FALSE;
	if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_ROLLBACK_SAVEPOINT],
								   params_set, NULL, error) == -1)
		status = FALSE;
	g_mutex_unlock (&mutex);

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

static gboolean
gda_sqlite_provider_delete_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
				      const gchar *name, GError **error)
{
	gboolean status = TRUE;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	g_return_val_if_fail (name && *name, FALSE);

	static GMutex mutex;
	static GdaSet *params_set = NULL;
	g_mutex_lock (&mutex);
	if (!params_set)
		params_set = gda_set_new_inline (1, "name", G_TYPE_STRING, name);
	else if (! gda_set_set_holder_value (params_set, error, "name", name))
		status = FALSE;
	if (status && gda_connection_statement_execute_non_select (cnc, internal_stmt[INTERNAL_RELEASE_SAVEPOINT],
								   params_set, NULL, error) == -1)
		status = FALSE;
	g_mutex_unlock (&mutex);

	/*g_print ("%s(%p) => %s\n", __FUNCTION__, cnc, status ? "TRUE" : "FALSE");*/
	return status;
}

/*
 * Feature support request
 */
static gboolean
gda_sqlite_provider_supports (GdaServerProvider *provider,
			      GdaConnection *cnc,
			      GdaConnectionFeature feature)
{
	if (cnc) {
		g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
		g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	}

	switch (feature) {
	case GDA_CONNECTION_FEATURE_SQL :
	case GDA_CONNECTION_FEATURE_TRANSACTIONS :
	case GDA_CONNECTION_FEATURE_AGGREGATES :
	case GDA_CONNECTION_FEATURE_INDEXES :
	case GDA_CONNECTION_FEATURE_TRIGGERS :
	case GDA_CONNECTION_FEATURE_VIEWS :
	case GDA_CONNECTION_FEATURE_PROCEDURES :
		return TRUE;
	case GDA_CONNECTION_FEATURE_MULTI_THREADING:
		return SQLITE3_CALL (sqlite3_threadsafe) () ? TRUE : FALSE;
	default:
		return FALSE;
	}
}

/*
 * Get data handler request
 */
static GdaDataHandler *
gda_sqlite_provider_get_data_handler (GdaServerProvider *provider, GdaConnection *cnc,
				      GType type, const gchar *dbms_type)
{
	GdaDataHandler *dh = NULL;

	if (cnc) {
		g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
		g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	}

	if (type == G_TYPE_INVALID) {
		TO_IMPLEMENT; /* use @dbms_type */
		dh = NULL;
	}
	else if (type == G_TYPE_STRING) {
		dh = gda_server_provider_handler_find (provider, cnc, type, NULL);
		if (!dh) {
			dh = gda_handler_string_new_with_provider (provider, cnc);
			if (dh) {
				gda_server_provider_handler_declare (provider, dh, cnc, G_TYPE_STRING, NULL);
				g_object_unref (dh);
			}
		}
	}
	else if (type == GDA_TYPE_BINARY) {
		dh = gda_server_provider_handler_find (provider, cnc, type, NULL);
		if (!dh) {
			dh = _gda_sqlite_handler_bin_new ();
			if (dh) {
				gda_server_provider_handler_declare (provider, dh, cnc, GDA_TYPE_BINARY, NULL);
				g_object_unref (dh);
			}
		}
	}
	else if ((type == GDA_TYPE_TIME) ||
		 (type == GDA_TYPE_TIMESTAMP) ||
		 (type == G_TYPE_DATE)) {
		dh = gda_server_provider_handler_find (provider, NULL, type, NULL);
		if (!dh) {
			dh = gda_handler_time_new ();
			/* SQLite format is 'YYYY-MM-DD HH:MM:SS.SSS' */
			gda_handler_time_set_sql_spec (GDA_HANDLER_TIME (dh), G_DATE_YEAR, G_DATE_MONTH,
						       G_DATE_DAY, '-', FALSE);
			gda_handler_time_set_str_spec (GDA_HANDLER_TIME (dh), G_DATE_YEAR, G_DATE_MONTH,
						       G_DATE_DAY, '-', FALSE);
			gda_server_provider_handler_declare (provider, dh, NULL, GDA_TYPE_TIME, NULL);
			gda_server_provider_handler_declare (provider, dh, NULL, GDA_TYPE_TIMESTAMP, NULL);
			gda_server_provider_handler_declare (provider, dh, NULL, G_TYPE_DATE, NULL);
			g_object_unref (dh);
		}
	}
	else if (type == G_TYPE_BOOLEAN) {
		dh = gda_server_provider_handler_find (provider, cnc, type, NULL);
		if (!dh) {
			dh = _gda_sqlite_handler_boolean_new ();
			if (dh) {
				gda_server_provider_handler_declare (provider, dh, cnc, G_TYPE_BOOLEAN, NULL);
				g_object_unref (dh);
			}
		}
	}
	else
		dh = gda_server_provider_handler_use_default (provider, type);

	return dh;
}

/*
 * Get default DBMS type request
 */
static const gchar*
gda_sqlite_provider_get_default_dbms_type (G_GNUC_UNUSED GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc, GType type)
{
	if ((type == G_TYPE_INT64) ||
	    (type == G_TYPE_INT) ||
	    (type == GDA_TYPE_SHORT) ||
	    (type == GDA_TYPE_USHORT) ||
	    (type == G_TYPE_CHAR) ||
	    (type == G_TYPE_UCHAR) ||
	    (type == G_TYPE_ULONG) ||
	    (type == G_TYPE_LONG) ||
	    (type == G_TYPE_UINT) ||
	    (type == G_TYPE_UINT64))
		return "integer";

	if (type == GDA_TYPE_BINARY)
		return "blob";

	if (type == G_TYPE_BOOLEAN)
		return "boolean";

	if ((type == GDA_TYPE_GEOMETRIC_POINT) ||
	    (type == G_TYPE_OBJECT) ||
	    (type == G_TYPE_STRING) ||
	    (type == G_TYPE_INVALID))
		return "string";

	if ((type == G_TYPE_DOUBLE) ||
	    (type == GDA_TYPE_NUMERIC) ||
	    (type == G_TYPE_FLOAT))
		return "real";

	if (type == GDA_TYPE_TIME)
		return "time";
	if (type == GDA_TYPE_TIMESTAMP)
		return "timestamp";
	if (type == G_TYPE_DATE)
		return "date";

	if ((type == GDA_TYPE_NULL) ||
	    (type == G_TYPE_GTYPE))
		return NULL;

	return "text";
}

/*
 * Create parser request
 */
static GdaSqlParser *
gda_sqlite_provider_create_parser (G_GNUC_UNUSED GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc)
{
	return (GdaSqlParser*) g_object_new (GDA_TYPE_SQL_PARSER, "tokenizer-flavour", GDA_SQL_PARSER_FLAVOUR_SQLITE, NULL);
}


/*
 * GdaStatement to SQL request
 */
static gchar *sqlite_render_compound (GdaSqlStatementCompound *stmt, GdaSqlRenderingContext *context, GError **error);

static gchar *sqlite_render_operation (GdaSqlOperation *op, GdaSqlRenderingContext *context, GError **error);
static gchar *sqlite_render_expr (GdaSqlExpr *expr, GdaSqlRenderingContext *context,
				  gboolean *is_default, gboolean *is_null,
				  GError **error);
static gchar *sqlite_render_distinct (GdaSqlStatementSelect *stmt,
				      GdaSqlRenderingContext *context, GError **error);

static gchar *
gda_sqlite_provider_statement_to_sql (GdaServerProvider *provider, GdaConnection *cnc,
				      GdaStatement *stmt, GdaSet *params, GdaStatementSqlFlag flags,
				      GSList **params_used, GError **error)
{
	gchar *str;
	GdaSqlRenderingContext context;

	g_return_val_if_fail (GDA_IS_STATEMENT (stmt), NULL);
	if (cnc) {
		g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
		g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
	}

	memset (&context, 0, sizeof (context));
	context.provider = provider;
	context.cnc = cnc;
	context.params = params;
	context.flags = flags;
	context.render_operation = (GdaSqlRenderingFunc) sqlite_render_operation; /* specific REGEXP rendering */
	context.render_compound = (GdaSqlRenderingFunc) sqlite_render_compound; /* don't surround each SELECT with parenthesis, EXCEPT ALL and INTERSECT ALL are not supported */
	context.render_expr = sqlite_render_expr; /* render "FALSE" as 0 and TRUE as 1 */
	context.render_distinct = (GdaSqlRenderingFunc) sqlite_render_distinct; /* DISTINCT ON (...) is not supported */

	str = gda_statement_to_sql_real (stmt, &context, error);

	if (str) {
		if (params_used)
			*params_used = context.params_used;
		else
			g_slist_free (context.params_used);
	}
	else {
		if (params_used)
			*params_used = NULL;
		g_slist_free (context.params_used);
	}
	return str;
}

/*
 * The difference with the default implementation is that DISTINCT ON (...) is not supported
 */
static gchar *
sqlite_render_distinct (GdaSqlStatementSelect *stmt, GdaSqlRenderingContext *context, GError **error)
{
	if (stmt->distinct) {
		if (stmt->distinct_expr) {
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
				     "%s", _("SQLite does not support specifying fields to apply DISTINCT clause on"));
			return NULL;
		}
		else {
			gchar *tmp;
			tmp = g_strdup ("DISTINCT\n");
			if (! (context->flags & GDA_STATEMENT_SQL_PRETTY))
				tmp [8] = 0;
			return tmp;
		}
	}
	else
		return NULL;
}

/*
 * The difference with the default implementation is to avoid surrounding each SELECT with parenthesis
 * and that EXCEPT ALL and INTERSECT ALL are not supported
 */
static gchar *
sqlite_render_compound (GdaSqlStatementCompound *stmt, GdaSqlRenderingContext *context, GError **error)
{
	GString *string;
	gchar *str;
	GSList *list;

	g_return_val_if_fail (stmt, NULL);
	g_return_val_if_fail (GDA_SQL_ANY_PART (stmt)->type == GDA_SQL_ANY_STMT_COMPOUND, NULL);

	string = g_string_new ("");

	for (list = stmt->stmt_list; list; list = list->next) {
		GdaSqlStatement *sqlstmt = (GdaSqlStatement*) list->data;
		if (list != stmt->stmt_list) {
			switch (stmt->compound_type) {
			case GDA_SQL_STATEMENT_COMPOUND_UNION:
				g_string_append (string, " UNION ");
				break;
			case GDA_SQL_STATEMENT_COMPOUND_UNION_ALL:
				g_string_append (string, " UNION ALL ");
				break;
			case GDA_SQL_STATEMENT_COMPOUND_INTERSECT:
				g_string_append (string, " INTERSECT ");
				break;
			case GDA_SQL_STATEMENT_COMPOUND_INTERSECT_ALL:
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
					     _("'%s' compound not supported by SQLite"),
					     "INTERSECT ALL");
				goto err;
				break;
			case GDA_SQL_STATEMENT_COMPOUND_EXCEPT:
				g_string_append (string, " EXCEPT ");
				break;
			case GDA_SQL_STATEMENT_COMPOUND_EXCEPT_ALL:
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
					     _("'%s' compound not supported by SQLite"),
					     "EXCEPT ALL");
				goto err;
				break;
			default:
				g_assert_not_reached ();
			}
		}
		switch (sqlstmt->stmt_type) {
		case GDA_SQL_ANY_STMT_SELECT:
			str = context->render_select (GDA_SQL_ANY_PART (sqlstmt->contents), context, error);
			if (!str) goto err;
			g_string_append (string, str);
			g_free (str);
			break;
		case GDA_SQL_ANY_STMT_COMPOUND:
			str = context->render_compound (GDA_SQL_ANY_PART (sqlstmt->contents), context, error);
			if (!str) goto err;
			g_string_append (string, str);
			g_free (str);
			break;
		default:
			g_assert_not_reached ();
		}
	}

	str = string->str;
	g_string_free (string, FALSE);
	return str;

 err:
	g_string_free (string, TRUE);
	return NULL;
}

/* The difference with the default implementation is specific REGEXP rendering */
static gchar *
sqlite_render_operation (GdaSqlOperation *op, GdaSqlRenderingContext *context, GError **error)
{
	gchar *str;
	GSList *list;
	GSList *sql_list; /* list of SqlOperand */
	GString *string;
	gchar *multi_op = NULL;

	typedef struct {
		gchar    *sql;
		gboolean  is_null;
		gboolean  is_default;
		gboolean  is_composed;
	} SqlOperand;
#define SQL_OPERAND(x) ((SqlOperand*)(x))

	g_return_val_if_fail (op, NULL);
	g_return_val_if_fail (GDA_SQL_ANY_PART (op)->type == GDA_SQL_ANY_SQL_OPERATION, NULL);

	/* can't have:
	 *  - op->operands == NULL
	 *  - incorrect number of operands
	 */
	if (!gda_sql_any_part_check_structure (GDA_SQL_ANY_PART (op), error)) return NULL;

	/* render operands */
	for (list = op->operands, sql_list = NULL; list; list = list->next) {
		SqlOperand *sqlop = g_new0 (SqlOperand, 1);
		GdaSqlExpr *expr = (GdaSqlExpr*) list->data;
		str = context->render_expr (expr, context, &(sqlop->is_default), &(sqlop->is_null), error);
		if (!str) {
			g_free (sqlop);
			goto out;
		}
		sqlop->sql = str;
		if (expr->cond || expr->case_s || expr->select)
			sqlop->is_composed = TRUE;
		sql_list = g_slist_prepend (sql_list, sqlop);
	}
	sql_list = g_slist_reverse (sql_list);

	str = NULL;
	switch (op->operator_type) {
	case GDA_SQL_OPERATOR_TYPE_EQ:
		if (SQL_OPERAND (sql_list->next->data)->is_null)
			str = g_strdup_printf ("%s IS NULL", SQL_OPERAND (sql_list->data)->sql);
		else
			str = g_strdup_printf ("%s = %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_IS:
		str = g_strdup_printf ("%s IS %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_LIKE:
		str = g_strdup_printf ("%s LIKE %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_NOTLIKE:
		str = g_strdup_printf ("%s NOT LIKE %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_ILIKE:
	case GDA_SQL_OPERATOR_TYPE_NOTILIKE:
		g_set_error (error, GDA_STATEMENT_ERROR, GDA_STATEMENT_SYNTAX_ERROR,
			     "%s", _("ILIKE operation not supported"));
		goto out;
		break;
	case GDA_SQL_OPERATOR_TYPE_GT:
		str = g_strdup_printf ("%s > %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_LT:
		str = g_strdup_printf ("%s < %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_GEQ:
		str = g_strdup_printf ("%s >= %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_LEQ:
		str = g_strdup_printf ("%s <= %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_DIFF:
		str = g_strdup_printf ("%s != %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_REGEXP:
		str = g_strdup_printf ("regexp (%s, %s)", SQL_OPERAND (sql_list->next->data)->sql, SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_REGEXP_CI:
		str = g_strdup_printf ("regexp (%s, %s, 'i')", SQL_OPERAND (sql_list->next->data)->sql,
				       SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_NOT_REGEXP_CI:
		str = g_strdup_printf ("NOT regexp (%s, %s, 'i')", SQL_OPERAND (sql_list->next->data)->sql,
				       SQL_OPERAND (sql_list->data)->sql);
	case GDA_SQL_OPERATOR_TYPE_SIMILAR:
		/* does not exist in SQLite => error */
		break;
	case GDA_SQL_OPERATOR_TYPE_NOT_REGEXP:
		str = g_strdup_printf ("NOT regexp (%s, %s)", SQL_OPERAND (sql_list->next->data)->sql,
				       SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_REM:
		str = g_strdup_printf ("%s %% %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_DIV:
		str = g_strdup_printf ("%s / %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_BITAND:
		str = g_strdup_printf ("%s & %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_BITOR:
		str = g_strdup_printf ("%s | %s", SQL_OPERAND (sql_list->data)->sql, SQL_OPERAND (sql_list->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_BETWEEN:
		str = g_strdup_printf ("%s BETWEEN %s AND %s", SQL_OPERAND (sql_list->data)->sql,
				       SQL_OPERAND (sql_list->next->data)->sql,
				       SQL_OPERAND (sql_list->next->next->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_ISNULL:
		str = g_strdup_printf ("%s IS NULL", SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_ISNOTNULL:
		str = g_strdup_printf ("%s IS NOT NULL", SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_BITNOT:
		str = g_strdup_printf ("~ %s", SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_NOT:
		str = g_strdup_printf ("NOT %s", SQL_OPERAND (sql_list->data)->sql);
		break;
	case GDA_SQL_OPERATOR_TYPE_IN:
	case GDA_SQL_OPERATOR_TYPE_NOTIN: {
		gboolean add_p = TRUE;
		if (sql_list->next && !(sql_list->next->next) &&
		    *(SQL_OPERAND (sql_list->next->data)->sql)=='(')
			add_p = FALSE;

		string = g_string_new (SQL_OPERAND (sql_list->data)->sql);
		if (op->operator_type == GDA_SQL_OPERATOR_TYPE_IN)
			g_string_append (string, " IN ");
		else
			g_string_append (string, " NOT IN ");
		if (add_p)
			g_string_append_c (string, '(');
		for (list = sql_list->next; list; list = list->next) {
			if (list != sql_list->next)
				g_string_append (string, ", ");
			g_string_append (string, SQL_OPERAND (list->data)->sql);
		}
		if (add_p)
			g_string_append_c (string, ')');
		str = string->str;
		g_string_free (string, FALSE);
		break;
	}
	case GDA_SQL_OPERATOR_TYPE_CONCAT:
		multi_op = "||";
		break;
	case GDA_SQL_OPERATOR_TYPE_PLUS:
		multi_op = "+";
		break;
	case GDA_SQL_OPERATOR_TYPE_MINUS:
		multi_op = "-";
		break;
	case GDA_SQL_OPERATOR_TYPE_STAR:
		multi_op = "*";
		break;
	case GDA_SQL_OPERATOR_TYPE_AND:
		multi_op = "AND";
		break;
	case GDA_SQL_OPERATOR_TYPE_OR:
		multi_op = "OR";
		break;
	default:
		g_assert_not_reached ();
		break;
	}

	if (multi_op) {
		if (!sql_list->next) {
			/* 1 operand only */
			string = g_string_new ("");
			g_string_append_printf (string, "%s %s", multi_op, SQL_OPERAND (sql_list->data)->sql);
		}
		else {
			/* 2 or more operands */
			if (SQL_OPERAND (sql_list->data)->is_composed) {
				string = g_string_new ("(");
				g_string_append (string, SQL_OPERAND (sql_list->data)->sql);
				g_string_append_c (string, ')');
			}
			else
				string = g_string_new (SQL_OPERAND (sql_list->data)->sql);
			for (list = sql_list->next; list; list = list->next) {
				g_string_append_printf (string, " %s ", multi_op);
				if (SQL_OPERAND (list->data)->is_composed) {
					g_string_append_c (string, '(');
					g_string_append (string, SQL_OPERAND (list->data)->sql);
					g_string_append_c (string, ')');
				}
				else
					g_string_append (string, SQL_OPERAND (list->data)->sql);
			}
		}
		str = string->str;
		g_string_free (string, FALSE);
	}

 out:
	for (list = sql_list; list; list = list->next) {
		g_free (((SqlOperand*)list->data)->sql);
		g_free (list->data);
	}
	g_slist_free (sql_list);

	return str;
}

/*
 * The difference with the default implementation is to render TRUE and FALSE as 0 and 1
 */
static gchar *
sqlite_render_expr (GdaSqlExpr *expr, GdaSqlRenderingContext *context, gboolean *is_default,
		    gboolean *is_null, GError **error)
{
	GString *string;
	gchar *str = NULL;

	g_return_val_if_fail (expr, NULL);
	g_return_val_if_fail (GDA_SQL_ANY_PART (expr)->type == GDA_SQL_ANY_EXPR, NULL);

	if (is_default)
		*is_default = FALSE;
	if (is_null)
		*is_null = FALSE;

	/* can't have:
	 *  - expr->cast_as && expr->param_spec
	 */
	if (!gda_sql_any_part_check_structure (GDA_SQL_ANY_PART (expr), error)) return NULL;

	string = g_string_new ("");
	if (expr->param_spec) {
		str = context->render_param_spec (expr->param_spec, expr, context, is_default, is_null, error);
		if (!str) goto err;
	}
	else if (expr->value) {
		if (G_VALUE_TYPE (expr->value) == G_TYPE_STRING) {
			/* specific treatment for strings, see documentation about GdaSqlExpr's value attribute */
			const gchar *vstr;
			vstr = g_value_get_string (expr->value);
			if (vstr) {
				if (expr->value_is_ident) {
					gchar **ids_array;
					gint i;
					GString *string = NULL;
					GdaConnectionOptions cncoptions = 0;
					if (context->cnc)
						g_object_get (G_OBJECT (context->cnc), "options", &cncoptions, NULL);
					ids_array = gda_sql_identifier_split (vstr);
					if (!ids_array)
						str = g_strdup (vstr);
					else if (!(ids_array[0])) goto err;
					else {
						for (i = 0; ids_array[i]; i++) {
							gchar *tmp;
							if (!string)
								string = g_string_new ("");
							else
								g_string_append_c (string, '.');
							tmp = gda_sql_identifier_quote (ids_array[i], context->cnc,
											context->provider, FALSE,
											cncoptions & GDA_CONNECTION_OPTIONS_SQL_IDENTIFIERS_CASE_SENSITIVE);
							g_string_append (string, tmp);
							g_free (tmp);
						}
						g_strfreev (ids_array);
						str = g_string_free (string, FALSE);
					}
				}
				else {
					/* we don't have an identifier */
					if (!g_ascii_strcasecmp (vstr, "default")) {
						if (is_default)
							*is_default = TRUE;
						str = g_strdup ("DEFAULT");
					}
					else if (!g_ascii_strcasecmp (vstr, "FALSE")) {
						g_free (str);
						str = g_strdup ("0");
					}
					else if (!g_ascii_strcasecmp (vstr, "TRUE")) {
						g_free (str);
						str = g_strdup ("1");
					}
					else
						str = g_strdup (vstr);
				}
			}
			else {
				str = g_strdup ("NULL");
				if (is_null)
					*is_null = TRUE;
			}
		}
		if (!str) {
			/* use a GdaDataHandler to render the value as valid SQL */
			GdaDataHandler *dh;
			if (context->cnc) {
				GdaServerProvider *prov;
				prov = gda_connection_get_provider (context->cnc);
				dh = gda_server_provider_get_data_handler_g_type (prov, context->cnc,
										  G_VALUE_TYPE (expr->value));
				if (!dh) goto err;
			}
			else
				dh = gda_data_handler_get_default (G_VALUE_TYPE (expr->value));

			if (dh)
				str = gda_data_handler_get_sql_from_value (dh, expr->value);
			else
				str = gda_value_stringify (expr->value);
			if (!str) goto err;
		}
	}
	else if (expr->func) {
		str = context->render_function (GDA_SQL_ANY_PART (expr->func), context, error);
		if (!str) goto err;
	}
	else if (expr->cond) {
		gchar *tmp;
		tmp = context->render_operation (GDA_SQL_ANY_PART (expr->cond), context, error);
		if (!tmp) goto err;
		str = NULL;
		if (GDA_SQL_ANY_PART (expr)->parent) {
			if (GDA_SQL_ANY_PART (expr)->parent->type == GDA_SQL_ANY_STMT_SELECT) {
				GdaSqlStatementSelect *selst;
				selst = (GdaSqlStatementSelect*) (GDA_SQL_ANY_PART (expr)->parent);
				if ((expr == selst->where_cond) ||
				    (expr == selst->having_cond))
					str = tmp;
			}
			else if (GDA_SQL_ANY_PART (expr)->parent->type == GDA_SQL_ANY_STMT_DELETE) {
				GdaSqlStatementDelete *delst;
				delst = (GdaSqlStatementDelete*) (GDA_SQL_ANY_PART (expr)->parent);
				if (expr == delst->cond)
					str = tmp;
			}
			else if (GDA_SQL_ANY_PART (expr)->parent->type == GDA_SQL_ANY_STMT_UPDATE) {
				GdaSqlStatementUpdate *updst;
				updst = (GdaSqlStatementUpdate*) (GDA_SQL_ANY_PART (expr)->parent);
				if (expr == updst->cond)
					str = tmp;
			}
		}

		if (!str) {
			str = g_strconcat ("(", tmp, ")", NULL);
			g_free (tmp);
		}
	}
	else if (expr->select) {
		gchar *str1;
		if (GDA_SQL_ANY_PART (expr->select)->type == GDA_SQL_ANY_STMT_SELECT)
			str1 = context->render_select (GDA_SQL_ANY_PART (expr->select), context, error);
		else if (GDA_SQL_ANY_PART (expr->select)->type == GDA_SQL_ANY_STMT_COMPOUND)
			str1 = context->render_compound (GDA_SQL_ANY_PART (expr->select), context, error);
		else
			g_assert_not_reached ();
		if (!str1) goto err;

		if (! GDA_SQL_ANY_PART (expr)->parent ||
		    (GDA_SQL_ANY_PART (expr)->parent->type != GDA_SQL_ANY_SQL_FUNCTION)) {
			str = g_strconcat ("(", str1, ")", NULL);
			g_free (str1);
		}
		else
			str = str1;
	}
	else if (expr->case_s) {
		str = context->render_case (GDA_SQL_ANY_PART (expr->case_s), context, error);
		if (!str) goto err;
	}
	else {
		if (is_null)
			*is_null = TRUE;
		str = g_strdup ("NULL");
	}

	if (!str) goto err;

	if (expr->cast_as)
		g_string_append_printf (string, "CAST (%s AS %s)", str, expr->cast_as);
	else
		g_string_append (string, str);
	g_free (str);

	str = string->str;
	g_string_free (string, FALSE);
	return str;

 err:
	g_string_free (string, TRUE);
	return NULL;
}

/*
 * Statement prepare request
 */
static GdaSqlitePStmt *real_prepare (GdaServerProvider *provider, GdaConnection *cnc, GdaStatement *stmt, GError **error);
static gboolean
gda_sqlite_provider_statement_prepare (GdaServerProvider *provider, GdaConnection *cnc,
				       GdaStatement *stmt, GError **error)
{
	GdaSqlitePStmt *ps;

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
	g_return_val_if_fail (GDA_IS_STATEMENT (stmt), FALSE);

	/* fetch prepares stmt if already done */
	ps = (GdaSqlitePStmt *) gda_connection_get_prepared_statement (cnc, stmt);
	if (ps)
		return TRUE;

	ps = real_prepare (provider, cnc, stmt, error);
	if (!ps)
		return FALSE;
	else {
		gda_connection_add_prepared_statement (cnc, stmt, (GdaPStmt *) ps);
		g_object_unref (ps);
		return TRUE;
	}
}

/*
 * Creates a new GdaStatement, as a copy of @stmt, and adds new OID columns, one for each table involved
 * in the SELECT
 * The GHashTable created (as @out_hash) contains:
 *  - key = table name
 *  - value = column number in the SELECT (use GPOINTER_TO_INT)
 *
 * This step is required for BLOBs which needs to table's ROWID to be opened. The extra columns
 * won't appear in the final result set.
 */
static GdaStatement *
add_oid_columns (GdaStatement *stmt, GHashTable **out_hash, gint *out_nb_cols_added)
{
	GHashTable *hash = NULL;
	GdaStatement *nstmt;
	GdaSqlStatement *sqlst;
	GdaSqlStatementSelect *sst;
	gint nb_cols_added = 0;
	gint add_index;
	GSList *list;

	*out_hash = NULL;
	*out_nb_cols_added = 0;

	GdaSqlStatementType type;
	type = gda_statement_get_statement_type (stmt);
	if (type == GDA_SQL_STATEMENT_COMPOUND) {
		return g_object_ref (stmt);
	}
	else if (type != GDA_SQL_STATEMENT_SELECT) {
		return g_object_ref (stmt);
	}

	g_object_get (G_OBJECT (stmt), "structure", &sqlst, NULL);
	g_assert (sqlst);
	hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
	sst = (GdaSqlStatementSelect*) sqlst->contents;

	if (!sst->from || sst->distinct) {
		gda_sql_statement_free (sqlst);
		return g_object_ref (stmt);
	}

	/* if there is an ORDER BY test if we can alter it */
	if (sst->order_by) {
		for (list = sst->order_by; list; list = list->next) {
			GdaSqlSelectOrder *order = (GdaSqlSelectOrder*) list->data;
			if (order->expr && order->expr->value &&
			    (G_VALUE_TYPE (order->expr->value) != G_TYPE_STRING)) {
				gda_sql_statement_free (sqlst);
				return g_object_ref (stmt);
			}
		}
	}

	add_index = 0;
	for (list = sst->from->targets; list; list = list->next) {
		GdaSqlSelectTarget *target = (GdaSqlSelectTarget*) list->data;
		GdaSqlSelectField *field;

		if (!target->table_name)
			continue;

		/* add a field */
		field = gda_sql_select_field_new (GDA_SQL_ANY_PART (sst));
		sst->expr_list = g_slist_insert (sst->expr_list, field, add_index);

		field->expr = gda_sql_expr_new (GDA_SQL_ANY_PART (field));

		gchar *str, *tmp;
		const gchar *name;
		if (target->as)
			name = target->as;
		else
			name = target->table_name;

		tmp = gda_sql_identifier_quote (name, NULL, NULL, FALSE, FALSE);
		str = g_strdup_printf ("%s.rowid", tmp);
		g_free (tmp);
		g_value_take_string ((field->expr->value = gda_value_new (G_TYPE_STRING)), str);

		/* add to hash table */
		add_index++;
		g_hash_table_insert (hash, gda_sql_identifier_prepare_for_compare (g_strdup (name)),
				     GINT_TO_POINTER (add_index)); /* ADDED 1 to column number,
								    * don't forget to remove 1 when using */
		if (target->as)
			g_hash_table_insert (hash, gda_sql_identifier_prepare_for_compare (g_strdup (target->table_name)),
					     GINT_TO_POINTER (add_index)); /* ADDED 1 to column number,
									    * don't forget to remove 1 when using */
		nb_cols_added ++;
	}

	/* if there is an ORDER BY which uses numbers, then also alter that */
	if (sst->order_by) {
		for (list = sst->order_by; list; list = list->next) {
			GdaSqlSelectOrder *order = (GdaSqlSelectOrder*) list->data;
			if (order->expr && order->expr->value) {
				long i;
				const gchar *cstr;
				gchar *endptr = NULL;
				cstr = g_value_get_string (order->expr->value);
				i = strtol (cstr, (char **) &endptr, 10);
				if (!endptr || !(*endptr)) {
					i += nb_cols_added;
					endptr = g_strdup_printf ("%ld", i);
					g_value_take_string (order->expr->value, endptr);
				}
			}
		}
	}

	/* prepare return */
	nstmt = (GdaStatement*) g_object_new (GDA_TYPE_STATEMENT, "structure", sqlst, NULL);
	gda_sql_statement_free (sqlst);
	/*g_print ("%s(): Added %d columns: %s\n", __FUNCTION__, nb_cols_added, gda_statement_to_sql (nstmt, NULL, NULL));*/

	*out_hash = hash;
	*out_nb_cols_added = nb_cols_added;

	return nstmt;
}

static GdaSqlitePStmt *
real_prepare (GdaServerProvider *provider, GdaConnection *cnc, GdaStatement *stmt, GError **error)
{
	int status;
	SqliteConnectionData *cdata;
	sqlite3_stmt *sqlite_stmt;
	gchar *sql;
	const char *left;
	GdaSqlitePStmt *ps;
	GdaSet *params = NULL;
	GSList *used_params = NULL;

	GdaStatement *real_stmt;
	GHashTable *hash;
	gint nb_rows_added;

	/* get SQLite's private data */
	cdata = (SqliteConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
	if (!cdata)
		return NULL;

	/* render as SQL understood by SQLite */
	if (! gda_statement_get_parameters (stmt, &params, error))
		return NULL;

	real_stmt = add_oid_columns (stmt, &hash, &nb_rows_added);
	sql = gda_sqlite_provider_statement_to_sql (provider, cnc, real_stmt, params, GDA_STATEMENT_SQL_PARAMS_AS_QMARK,
						    &used_params, error);
	if (!sql)
		goto out_err;

	/* prepare statement */
	status = SQLITE3_CALL (sqlite3_prepare_v2) (cdata->connection, sql, -1, &sqlite_stmt, &left);
	if (status != SQLITE_OK) {
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR,
			     "%s", SQLITE3_CALL (sqlite3_errmsg) (cdata->connection));
		goto out_err;
	}

	if (left && (*left != 0))
		g_warning ("SQlite SQL: %s (REMAIN:%s)\n", sql, left);

	/* make a list of the parameter names used in the statement */
	GSList *param_ids = NULL;
	if (used_params) {
		GSList *list;
		for (list = used_params; list; list = list->next) {
			const gchar *cid;
			cid = gda_holder_get_id (GDA_HOLDER (list->data));
			if (cid) {
				param_ids = g_slist_append (param_ids, g_strdup (cid));
				/*g_print ("PREPARATION: param ID: %s\n", cid);*/
			}
			else {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR,
					      "%s", _("Unnamed parameter is not allowed in prepared statements"));
				g_slist_foreach (param_ids, (GFunc) g_free, NULL);
				g_slist_free (param_ids);
				goto out_err;
			}
		}
		g_slist_free (used_params);
	}
	if (params)
		g_object_unref (params);

	/* create a prepared statement object */
	ps = _gda_sqlite_pstmt_new (sqlite_stmt);
	gda_pstmt_set_gda_statement (_GDA_PSTMT (ps), stmt);
	_GDA_PSTMT (ps)->param_ids = param_ids;
	_GDA_PSTMT (ps)->sql = sql;
	ps->rowid_hash = hash;
	ps->nb_rowid_columns = nb_rows_added;
	g_object_unref (real_stmt);
	/*g_print ("%s(%s) => GdaSqlitePStmt %p\n", __FUNCTION__, sql, ps);*/
	return ps;

 out_err:
	if (hash)
		g_hash_table_destroy (hash);
	g_object_unref (real_stmt);
	if (used_params)
		g_slist_free (used_params);
	if (params)
		g_object_unref (params);
	g_free (sql);
	return NULL;
}

#define MAKE_LAST_INSERTED_SET_ID "__gda"
static void
lir_stmt_reset_cb (GdaStatement *stmt, G_GNUC_UNUSED gpointer data)
{
	/* get rid of the SELECT statement used in make_last_inserted_set() */
	g_object_set_data ((GObject*) stmt, MAKE_LAST_INSERTED_SET_ID, NULL);
}

static GdaSet *
make_last_inserted_set (GdaConnection *cnc, GdaStatement *stmt, sqlite3_int64 last_id)
{
	GError *lerror = NULL;

	GdaStatement *statement;
	statement = g_object_get_data ((GObject*) stmt, MAKE_LAST_INSERTED_SET_ID);
	if (!statement) {
		/* analyze @stmt */
		GdaSqlStatement *sql_insert;
		GdaSqlStatementInsert *insert;
		if (gda_statement_get_statement_type (stmt) != GDA_SQL_STATEMENT_INSERT)
			/* unable to compute anything */
			return NULL;
		g_object_get (G_OBJECT (stmt), "structure", &sql_insert, NULL);
		g_assert (sql_insert);
		insert = (GdaSqlStatementInsert *) sql_insert->contents;

		/* build corresponding SELECT statement */
		GdaSqlStatementSelect *select;
		GdaSqlSelectTarget *target;
		GdaSqlStatement *sql_statement = gda_sql_statement_new (GDA_SQL_STATEMENT_SELECT);

		select = (GdaSqlStatementSelect*) sql_statement->contents;

		/* FROM */
		select->from = gda_sql_select_from_new (GDA_SQL_ANY_PART (select));
		target = gda_sql_select_target_new (GDA_SQL_ANY_PART (select->from));
		gda_sql_select_from_take_new_target (select->from, target);

		/* Filling in the target */
		GValue *value;
		g_value_set_string ((value = gda_value_new (G_TYPE_STRING)), insert->table->table_name);
		gda_sql_select_target_take_table_name (target, value);
		gda_sql_statement_free (sql_insert);

		/* selected fields */
		GdaSqlSelectField *field;
		GSList *fields_list = NULL;

		field = gda_sql_select_field_new (GDA_SQL_ANY_PART (select));
		g_value_set_string ((value = gda_value_new (G_TYPE_STRING)), "*");
		gda_sql_select_field_take_star_value (field, value);
		fields_list = g_slist_append (fields_list, field);

		gda_sql_statement_select_take_expr_list (sql_statement, fields_list);

		/* WHERE */
		GdaSqlExpr *where, *expr;
		GdaSqlOperation *cond;
		where = gda_sql_expr_new (GDA_SQL_ANY_PART (select));
		cond = gda_sql_operation_new (GDA_SQL_ANY_PART (where));
		where->cond = cond;
		cond->operator_type = GDA_SQL_OPERATOR_TYPE_EQ;
		expr = gda_sql_expr_new (GDA_SQL_ANY_PART (cond));
		g_value_set_string ((value = gda_value_new (G_TYPE_STRING)), "rowid");
		expr->value = value;
		cond->operands = g_slist_append (NULL, expr);

		GdaSqlParamSpec *pspec = g_new0 (GdaSqlParamSpec, 1);
		pspec->name = g_strdup ("lid");
		pspec->g_type = G_TYPE_INT64;
		pspec->nullok = TRUE;
		pspec->is_param = TRUE;
		expr = gda_sql_expr_new (GDA_SQL_ANY_PART (cond));
		expr->param_spec = pspec;
		cond->operands = g_slist_append (cond->operands, expr);

		gda_sql_statement_select_take_where_cond (sql_statement, where);

		if (gda_sql_statement_check_structure (sql_statement, &lerror) == FALSE) {
			g_warning (_("Can't build SELECT statement to get last inserted row: %s"),
				   lerror && lerror->message ? lerror->message : _("No detail"));
			if (lerror)
				g_error_free (lerror);
			gda_sql_statement_free (sql_statement);
			return NULL;
		}
		statement = g_object_new (GDA_TYPE_STATEMENT, "structure", sql_statement, NULL);
		gda_sql_statement_free (sql_statement);

		GdaSet *params;
		if (! gda_statement_get_parameters (statement, &params, &lerror)) {
			g_warning (_("Can't build SELECT statement to get last inserted row: %s"),
				   lerror && lerror->message ? lerror->message : _("No detail"));
			if (lerror)
				g_error_free (lerror);
			g_object_unref (statement);
			return NULL;
		}

		g_object_set_data_full ((GObject*) stmt, MAKE_LAST_INSERTED_SET_ID, statement, g_object_unref);
		g_object_set_data_full ((GObject*) stmt, MAKE_LAST_INSERTED_SET_ID "P", params, g_object_unref);
		g_signal_connect (stmt, "reset",
				  G_CALLBACK (lir_stmt_reset_cb), NULL);
	}

	/* execute SELECT statement */
	GdaDataModel *model;
	GdaSet *params;
	params = g_object_get_data ((GObject*) stmt, MAKE_LAST_INSERTED_SET_ID "P");
	g_assert (params);
	g_assert (gda_set_set_holder_value (params, NULL, "lid", last_id));
        model = gda_connection_statement_execute_select (cnc, statement, params, &lerror);
        if (!model) {
                g_warning (_("Can't execute SELECT statement to get last inserted row: %s"),
			   lerror && lerror->message ? lerror->message : _("No detail"));
		if (lerror)
			g_error_free (lerror);
		return NULL;
        }
	else {
		GdaSet *set = NULL;
		GSList *holders = NULL;
		gint nrows, ncols, i;

		nrows = gda_data_model_get_n_rows (model);
		if (nrows <= 0) {
			g_warning (_("SELECT statement to get last inserted row did not return any row"));
			return NULL;
		}
		else if (nrows > 1) {
			g_warning (_("SELECT statement to get last inserted row returned too many (%d) rows"),
				   nrows);
			return NULL;
		}
		ncols = gda_data_model_get_n_columns (model);
		for (i = 0; i < ncols; i++) {
			GdaHolder *h;
			GdaColumn *col;
			gchar *id;
			const GValue *cvalue;
			col = gda_data_model_describe_column (model, i);
			h = gda_holder_new (gda_column_get_g_type (col));
			id = g_strdup_printf ("+%d", i);
			g_object_set (G_OBJECT (h), "id", id,
				      "name", gda_column_get_name (col), NULL);
			g_free (id);
			cvalue = gda_data_model_get_value_at (model, i, 0, NULL);
			if (!cvalue || !gda_holder_set_value (h, cvalue, NULL)) {
				if (holders) {
					g_slist_foreach (holders, (GFunc) g_object_unref, NULL);
					g_slist_free (holders);
					holders = NULL;
				}
				break;
			}
			holders = g_slist_prepend (holders, h);
		}
		g_object_unref (model);

		if (holders) {
			holders = g_slist_reverse (holders);
			set = gda_set_new_read_only (holders);
			g_slist_foreach (holders, (GFunc) g_object_unref, NULL);
			g_slist_free (holders);
		}

		return set;
	}
}

/*
 * This function opens any blob which has been inserted or updated as a ZERO blob (the blob currently
 * only contains zeros) and fills its contents with the blob passed as parameter when executing the statement.
 *
 * @blobs_list is freed here
 */
static GdaConnectionEvent *
fill_blob_data (GdaConnection *cnc, GdaSet *params,
		SqliteConnectionData *cdata, GdaSqlitePStmt *pstmt, GSList *blobs_list, GError **error)
{
	if (!blobs_list)
		/* nothing to do */
		return NULL;

	const gchar *cstr = NULL;
	GdaStatement *stmt;
	sqlite3_int64 rowid = -1;
	GdaDataModel *model = NULL;
	GError *lerror = NULL;

	/* get single ROWID or a list of ROWID */
	stmt = gda_pstmt_get_gda_statement (GDA_PSTMT (pstmt));
	if (!stmt) {
		g_set_error (&lerror, GDA_SERVER_PROVIDER_ERROR,
			     GDA_SERVER_PROVIDER_INTERNAL_ERROR, "%s",
			     _("Prepared statement has no associated GdaStatement"));
		goto blobs_out;
	}
	if (gda_statement_get_statement_type (stmt) == GDA_SQL_STATEMENT_INSERT) {
		rowid = SQLITE3_CALL (sqlite3_last_insert_rowid) (cdata->connection);
	}
	else if (gda_statement_get_statement_type (stmt) == GDA_SQL_STATEMENT_UPDATE) {
		GdaSqlStatement *sel_stmt;
		GdaSqlStatementSelect *sst;
		sel_stmt = gda_compute_select_statement_from_update (stmt, &lerror);
		if (!sel_stmt)
			goto blobs_out;
		sst = (GdaSqlStatementSelect*) sel_stmt->contents;
		GdaSqlSelectField *oidfield;
		oidfield = gda_sql_select_field_new (GDA_SQL_ANY_PART (sst));
		sst->expr_list = g_slist_prepend (NULL, oidfield);
		oidfield->expr = gda_sql_expr_new (GDA_SQL_ANY_PART (oidfield));
		g_value_set_string ((oidfield->expr->value = gda_value_new (G_TYPE_STRING)), "rowid");

		GdaStatement *select;
		select = (GdaStatement *) g_object_new (GDA_TYPE_STATEMENT, "structure", sel_stmt, NULL);
		gda_sql_statement_free (sel_stmt);
		model = gda_connection_statement_execute_select (cnc, select, params, &lerror);
		if (!model) {
			g_object_unref (select);
			goto blobs_out;
		}
		g_object_unref (select);
	}

	/* actual blob filling */
	GSList *list;
	for (list = blobs_list; list; list = list->next) {
		PendingBlob *pb = (PendingBlob*) list->data;

		if (rowid >= 0) {
			/*g_print ("Filling BLOB @ %s.%s.%s, rowID %ld\n", pb->db, pb->table, pb->column, rowid);*/
			GdaSqliteBlobOp *bop;
			bop = (GdaSqliteBlobOp*) _gda_sqlite_blob_op_new (cdata, pb->db, pb->table, pb->column, rowid);
			if (!bop) {
				cstr =  _("Can't create SQLite BLOB handle");
				goto blobs_out;
			}
			if (gda_blob_op_write (GDA_BLOB_OP (bop), pb->blob, 0) < 0) {
				cstr =  _("Can't write to SQLite's BLOB");
				g_object_unref (bop);
				goto blobs_out;
			}
			g_object_unref (bop);
		}
		else if (model) {
			gint nrows, i;
			nrows = gda_data_model_get_n_rows (model);
			for (i = 0; i < nrows; i++) {
				const GValue *cvalue;
				cvalue = gda_data_model_get_value_at (model, 0, i, &lerror);
				if (!cvalue) {
					g_object_unref (model);
					goto blobs_out;
				}
				if (G_VALUE_TYPE (cvalue) == G_TYPE_INT64)
					rowid = g_value_get_int64 (cvalue);
				else if (G_VALUE_TYPE (cvalue) == G_TYPE_INT)
					rowid = g_value_get_int (cvalue);
				else {
					g_set_error (&lerror, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_INTERNAL_ERROR,
						     _("Can't obtain SQLite BLOB handle (reported type is '%s'), "
						       "please report this bug to "
						       "http://bugzilla.gnome.org/ for the \"libgda\" product."),
						       g_type_name (G_VALUE_TYPE (cvalue)));
					g_object_unref (model);
					goto blobs_out;
				}
				GdaSqliteBlobOp *bop;
				bop = (GdaSqliteBlobOp*) _gda_sqlite_blob_op_new (cdata, pb->db, pb->table, pb->column, rowid);
				if (!bop) {
					cstr =  _("Can't create SQLite BLOB handle");
					g_object_unref (model);
					goto blobs_out;
				}
				if (gda_blob_op_write (GDA_BLOB_OP (bop), pb->blob, 0) < 0) {
					cstr =  _("Can't write to SQLite's BLOB");
					g_object_unref (bop);
					g_object_unref (model);
					goto blobs_out;
				}
				g_object_unref (bop);
			}
			g_object_unref (model);
		}
		else
			cstr = _("Can't identify the ROWID of the blob to fill");
	}

 blobs_out:
	pending_blobs_free_list (blobs_list);

	if (cstr) {
		GdaConnectionEvent *event;
		event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
		gda_connection_event_set_description (event, cstr);
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
			     GDA_SERVER_PROVIDER_DATA_ERROR, "%s", cstr);
		return event;
	}
	if (lerror) {
		GdaConnectionEvent *event;
		event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
		gda_connection_event_set_description (event, lerror->message ? lerror->message : _("No detail"));
		g_propagate_error (error, lerror);
		return event;
	}
	return NULL;
}

/*
 * Execute statement request
 */
static GObject *
gda_sqlite_provider_statement_execute (GdaServerProvider *provider, GdaConnection *cnc,
				       GdaStatement *stmt, GdaSet *params,
				       GdaStatementModelUsage model_usage,
				       GType *col_types, GdaSet **last_inserted_row,
				       guint *task_id, GdaServerProviderExecCallback async_cb,
				       gpointer cb_data, GError **error)
{
	GdaSqlitePStmt *ps;
	SqliteConnectionData *cdata;
	gboolean new_ps = FALSE;
	gboolean allow_noparam;
	gboolean empty_rs = FALSE; /* TRUE when @allow_noparam is TRUE and there is a problem with @params
				      => resulting data model will be empty (0 row) */

	g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
	g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
	g_return_val_if_fail (GDA_IS_STATEMENT (stmt), NULL);

	if (async_cb) {
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
			      "%s", _("Provider does not support asynchronous statement execution"));
                return NULL;
	}

	allow_noparam = (model_usage & GDA_STATEMENT_MODEL_ALLOW_NOPARAM) &&
		(gda_statement_get_statement_type (stmt) == GDA_SQL_STATEMENT_SELECT);

	if (last_inserted_row)
		*last_inserted_row = NULL;

	/* get SQLite's private data */
	cdata = (SqliteConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
	if (!cdata)
		return NULL;

	/* get/create new prepared statement */
	ps = (GdaSqlitePStmt *) gda_connection_get_prepared_statement (cnc, stmt);
	if (!ps) {
		if (!gda_sqlite_provider_statement_prepare (provider, cnc, stmt, NULL)) {
			/* try to use the SQL when parameters are rendered with their values, using GMT for timezones  */
			gchar *sql;
			int status;
			sqlite3_stmt *sqlite_stmt;
			char *left;

			sql = gda_sqlite_provider_statement_to_sql (provider, cnc, stmt, params,
								    GDA_STATEMENT_SQL_TIMEZONE_TO_GMT, NULL, error);
			if (!sql)
				return NULL;

			status = SQLITE3_CALL (sqlite3_prepare_v2) (cdata->connection, sql, -1,
								    &sqlite_stmt, (const char**) &left);
			if (status != SQLITE_OK) {
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR,
					     "%s", SQLITE3_CALL (sqlite3_errmsg) (cdata->connection));
				g_free (sql);
				return NULL;
			}

			if (left && (*left != 0)) {
				g_warning ("SQlite SQL: %s (REMAIN:%s)\n", sql, left);
				*left = 0;
			}

			/* create a SQLitePreparedStatement */
			ps = _gda_sqlite_pstmt_new (sqlite_stmt);
			_GDA_PSTMT (ps)->sql = sql;

			new_ps = TRUE;
		}
		else
			ps = (GdaSqlitePStmt *) gda_connection_get_prepared_statement (cnc, stmt);
	}
	else if (ps->stmt_used) {
		/* Don't use @ps => prepare stmt again */
		GdaSqlitePStmt *nps;
		nps = real_prepare (provider, cnc, stmt, error);
		if (!nps)
			return NULL;
		gda_pstmt_copy_contents ((GdaPStmt *) ps, (GdaPStmt *) nps);
		ps = nps;
		new_ps = TRUE;
	}

	/* check that prepared stmt is not NULL, to avoid a crash */
	if (!ps->sqlite_stmt) {
		GdaConnectionEvent *event;
		const char *errmsg;

		errmsg = _("Empty statement");
		event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
		gda_connection_event_set_description (event, errmsg);
		gda_connection_add_event (cnc, event);
		gda_connection_del_prepared_statement (cnc, stmt);
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_EMPTY_STMT_ERROR,
			      "%s", errmsg);
		if (new_ps)
			g_object_unref (ps);
		return NULL;
	}

	/* reset prepared stmt */
	if ((SQLITE3_CALL (sqlite3_reset) (ps->sqlite_stmt) != SQLITE_OK) ||
	    (SQLITE3_CALL (sqlite3_clear_bindings) (ps->sqlite_stmt) != SQLITE_OK)) {
		GdaConnectionEvent *event;
		const char *errmsg;

		errmsg = SQLITE3_CALL (sqlite3_errmsg) (cdata->connection);
		event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
		gda_connection_event_set_description (event, errmsg);
		gda_connection_add_event (cnc, event);
		gda_connection_del_prepared_statement (cnc, stmt);
		g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR,
			      "%s", errmsg);
		if (new_ps)
			g_object_unref (ps);
		return NULL;
	}

	/* bind statement's parameters */
	GSList *list;
	GdaConnectionEvent *event = NULL;
	int i;
	GSList *blobs_list = NULL; /* list of PendingBlob structures */

	for (i = 1, list = _GDA_PSTMT (ps)->param_ids; list; list = list->next, i++) {
		const gchar *pname = (gchar *) list->data;
		GdaHolder *h = NULL;

		if (!params) {
			event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
			gda_connection_event_set_description (event, _("Missing parameter(s) to execute query"));
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_MISSING_PARAM_ERROR,
				      "%s", _("Missing parameter(s) to execute query"));
			break;
		}

		h = gda_set_get_holder (params, pname);
		if (!h) {
			gchar *tmp = gda_alphanum_to_text (g_strdup (pname + 1));
			if (tmp) {
				h = gda_set_get_holder (params, tmp);
				g_free (tmp);
			}
		}
		if (!h) {
			if (allow_noparam) {
				/* bind param to NULL */
				SQLITE3_CALL (sqlite3_bind_null) (ps->sqlite_stmt, i);
				empty_rs = TRUE;
				continue;
			}
			else {

				gchar *str;
				str = g_strdup_printf (_("Missing parameter '%s' to execute query"), pname);
				event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event, str);
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_MISSING_PARAM_ERROR, "%s", str);
				g_free (str);
				break;
			}
		}

		if (!gda_holder_is_valid (h)) {
			if (allow_noparam) {
				/* bind param to NULL */
				SQLITE3_CALL (sqlite3_bind_null) (ps->sqlite_stmt, i);
				empty_rs = TRUE;
				continue;
			}
			else {
				gchar *str;
				str = g_strdup_printf (_("Parameter '%s' is invalid"), pname);
				event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event, str);
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_MISSING_PARAM_ERROR, "%s", str);
				g_free (str);
				break;
			}
		}
		else if (gda_holder_value_is_default (h) && !gda_holder_get_value (h)) {
			/* create a new GdaStatement to handle all default values and execute it instead */
			GdaSqlStatement *sqlst;
			GError *lerror = NULL;
			sqlst = gda_statement_rewrite_for_default_values (stmt, params, TRUE, &lerror);
			if (!sqlst) {
				event = gda_connection_point_available_event (cnc,
									      GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event, lerror && lerror->message ?
								      lerror->message :
								      _("Can't rewrite statement handle default values"));
				g_propagate_error (error, lerror);
				break;
			}

			GdaStatement *rstmt;
			GObject *res;
			rstmt = g_object_new (GDA_TYPE_STATEMENT, "structure", sqlst, NULL);
			gda_sql_statement_free (sqlst);
			if (new_ps)
				g_object_unref (ps);
			pending_blobs_free_list (blobs_list);
			res = gda_sqlite_provider_statement_execute (provider, cnc,
								     rstmt, params,
								     model_usage,
								     col_types, last_inserted_row,
								     task_id,
								     async_cb, cb_data, error);
			g_object_unref (rstmt);
			return res;
		}

		const GValue *value = gda_holder_get_value (h);
		/*g_print ("BINDING param '%s' to GdaHolder %p, valued to [%s]\n", pname, h, gda_value_stringify (value));*/
		if (!value || gda_value_is_null (value)) {
			GdaStatement *rstmt;
			if (! gda_rewrite_statement_for_null_parameters (stmt, params, &rstmt, error))
				SQLITE3_CALL (sqlite3_bind_null) (ps->sqlite_stmt, i);
			else if (!rstmt)
				return NULL;
			else {
				/* The strategy here is to execute @rstmt using its prepared
				 * statement, but with common data from @ps. Beware that
				 * the @param_ids attribute needs to be retained (i.e. it must not
				 * be the one copied from @ps) */
				GObject *obj;
				GdaSqlitePStmt *tps;
				GdaPStmt *gtps;
				GSList *prep_param_ids, *copied_param_ids;
				if (!gda_sqlite_provider_statement_prepare (provider, cnc,
									    rstmt, error))
					return NULL;
				tps = (GdaSqlitePStmt *)
					gda_connection_get_prepared_statement (cnc, rstmt);
				gtps = (GdaPStmt *) tps;

				/* keep @param_ids to avoid being cleared by gda_pstmt_copy_contents() */
				prep_param_ids = gtps->param_ids;
				gtps->param_ids = NULL;
				
				/* actual copy */
				gda_pstmt_copy_contents ((GdaPStmt *) ps, (GdaPStmt *) tps);

				/* restore previous @param_ids */
				copied_param_ids = gtps->param_ids;
				gtps->param_ids = prep_param_ids;

				/* execute */
				obj = gda_sqlite_provider_statement_execute (provider, cnc,
									     rstmt, params,
									     model_usage,
									     col_types,
									     last_inserted_row,
									     task_id, async_cb,
									     cb_data, error);
				/* clear original @param_ids and restore copied one */
				g_slist_foreach (prep_param_ids, (GFunc) g_free, NULL);
				g_slist_free (prep_param_ids);

				gtps->param_ids = copied_param_ids;

				/*if (GDA_IS_DATA_MODEL (obj))
				  gda_data_model_dump ((GdaDataModel*) obj, NULL);*/

				g_object_unref (rstmt);

				if (new_ps)
					g_object_unref (ps);
				pending_blobs_free_list (blobs_list);
				return obj;
			}
		}
		else if (G_VALUE_TYPE (value) == G_TYPE_STRING)
			SQLITE3_CALL (sqlite3_bind_text) (ps->sqlite_stmt, i,
							  g_value_get_string (value), -1, SQLITE_TRANSIENT);
		else if (G_VALUE_TYPE (value) == G_TYPE_INT)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_int (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_LONG)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_long (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_DOUBLE)
			SQLITE3_CALL (sqlite3_bind_double) (ps->sqlite_stmt, i, g_value_get_double (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_FLOAT)
			SQLITE3_CALL (sqlite3_bind_double) (ps->sqlite_stmt, i, g_value_get_float (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_UINT)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_uint (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_BOOLEAN)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_boolean (value) ? 1 : 0);
		else if (G_VALUE_TYPE (value) == G_TYPE_INT64)
			SQLITE3_CALL (sqlite3_bind_int64) (ps->sqlite_stmt, i, g_value_get_int64 (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_UINT64)
			SQLITE3_CALL (sqlite3_bind_int64) (ps->sqlite_stmt, i, g_value_get_uint64 (value));
		else if (G_VALUE_TYPE (value) == GDA_TYPE_SHORT)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, gda_value_get_short (value));
		else if (G_VALUE_TYPE (value) == GDA_TYPE_USHORT)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, gda_value_get_ushort (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_CHAR)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_schar (value));
		else if (G_VALUE_TYPE (value) == G_TYPE_UCHAR)
			SQLITE3_CALL (sqlite3_bind_int) (ps->sqlite_stmt, i, g_value_get_uchar (value));
		else if (G_VALUE_TYPE (value) == GDA_TYPE_BLOB) {
			glong blob_len;
			GdaBlob *blob = (GdaBlob*) gda_value_get_blob (value);
			const gchar *str = NULL;

			/* force reading the complete BLOB into memory */
			if (blob->op)
				blob_len = gda_blob_op_get_length (blob->op);
			else
				blob_len = ((GdaBinary*) blob)->binary_length;
			if (blob_len < 0)
				str = _("Can't get BLOB's length");
			else if (blob_len >= G_MAXINT)
				str = _("BLOB is too big");

			if (str) {
				event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event, str);
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_DATA_ERROR, "%s", str);
				break;
			}

			PendingBlob *pb;
			GError *lerror = NULL;
			pb = make_pending_blob (cnc, stmt, h, &lerror);
			if (!pb) {
				event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event,
				   lerror && lerror->message ? lerror->message : _("No detail"));

				g_propagate_error (error, lerror);
				break;
			}
			pb->blob = blob;
			blobs_list = g_slist_prepend (blobs_list, pb);

			if (SQLITE3_CALL (sqlite3_bind_zeroblob) (ps->sqlite_stmt, i, (int) blob_len) !=
			    SQLITE_OK) {
				event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
				gda_connection_event_set_description (event,
				   lerror && lerror->message ? lerror->message : _("No detail"));

				g_propagate_error (error, lerror);
				break;
			}
		}
		else if (G_VALUE_TYPE (value) == GDA_TYPE_BINARY) {
			GdaBinary *bin = (GdaBinary *) gda_value_get_binary (value);
			SQLITE3_CALL (sqlite3_bind_blob) (ps->sqlite_stmt, i,
							  bin->data, bin->binary_length, SQLITE_TRANSIENT);
		}
		else if (G_VALUE_TYPE (value) == GDA_TYPE_TIME) {
			GString *string;
			GdaTime *gtime;
			gboolean tofree = FALSE;

			gtime = (GdaTime *) gda_value_get_time (value);

			string = g_string_new ("");
			if (gtime->timezone != GDA_TIMEZONE_INVALID) {
				/* SQLite cant' store timezone information, so if timezone information is
				 * provided, we do our best and convert it to GMT */
				gtime = gda_time_copy (gtime);
				tofree = TRUE;
				gda_time_change_timezone (gtime, 0);
			}

			g_string_append_printf (string, "%02u:%02u:%02u",
						gtime->hour,
						gtime->minute,
						gtime->second);
			if (gtime->fraction > 0)
				g_string_append_printf (string, ".%lu", gtime->fraction);

			if (tofree)
				gda_time_free (gtime);
			SQLITE3_CALL (sqlite3_bind_text) (ps->sqlite_stmt, i, g_string_free (string, FALSE), -1, g_free);
		}
		else if (G_VALUE_TYPE (value) == G_TYPE_DATE) {
			gchar *str;
			const GDate *ts;

			ts = g_value_get_boxed (value);
			str = g_strdup_printf ("%4d-%02d-%02d", g_date_get_year (ts),
					       g_date_get_month (ts), g_date_get_day (ts));
			SQLITE3_CALL (sqlite3_bind_text) (ps->sqlite_stmt, i, str, -1, g_free);
		}
		else if (G_VALUE_TYPE (value) == GDA_TYPE_TIMESTAMP) {
			GString *string;
			GdaTimestamp *timestamp;
			gboolean tofree = FALSE;

			timestamp = (GdaTimestamp *) gda_value_get_timestamp (value);

			string = g_string_new ("");
			if (timestamp->timezone != GDA_TIMEZONE_INVALID) {
				/* SQLite cant' store timezone information, so if timezone information is
				 * provided, we do our best and convert it to GMT */
				timestamp = gda_timestamp_copy (timestamp);
				tofree = TRUE;
				gda_timestamp_change_timezone (timestamp, 0);
			}

			g_string_append_printf (string, "%04u-%02u-%02u %02u:%02u:%02u",
						timestamp->year,
						timestamp->month,
						timestamp->day,
						timestamp->hour,
						timestamp->minute,
						timestamp->second);
			if (timestamp->fraction > 0)
				g_string_append_printf (string, ".%lu", timestamp->fraction);

			if (tofree)
				gda_timestamp_free (timestamp);

			SQLITE3_CALL (sqlite3_bind_text) (ps->sqlite_stmt, i, g_string_free (string, FALSE), -1, g_free);
		}
		else if (G_VALUE_TYPE (value) == GDA_TYPE_NUMERIC) {
			const GdaNumeric *gdan;

			gdan = gda_value_get_numeric (value);
			SQLITE3_CALL (sqlite3_bind_text) (ps->sqlite_stmt, i, gda_numeric_get_string((GdaNumeric*)gdan), -1, SQLITE_TRANSIENT);
		}
		else {
			gchar *str;
			str = g_strdup_printf (_("Non handled data type '%s'"),
					       g_type_name (G_VALUE_TYPE (value)));
			event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
			gda_connection_event_set_description (event, str);
			g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
				     GDA_SERVER_PROVIDER_MISSING_PARAM_ERROR, "%s", str);
			g_free (str);
			break;
		}
	}

	if (event) {
		gda_connection_add_event (cnc, event);
		if (new_ps)
			g_object_unref (ps);
		pending_blobs_free_list (blobs_list);
		return NULL;
	}

	/* add a connection event */
	event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_COMMAND);
        gda_connection_event_set_description (event, _GDA_PSTMT (ps)->sql);
        gda_connection_add_event (cnc, event);

	/* treat prepared and bound statement */
	if (! g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "SELECT", 6) ||
            ! g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "PRAGMA", 6) ||
            ! g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "EXPLAIN", 7)) {
		GObject *data_model;
		GdaDataModelAccessFlags flags;

		if (model_usage & GDA_STATEMENT_MODEL_RANDOM_ACCESS)
			flags = GDA_DATA_MODEL_ACCESS_RANDOM;
		else if (model_usage & GDA_DATA_MODEL_ACCESS_CURSOR_BACKWARD)
			flags = GDA_DATA_MODEL_ACCESS_RANDOM;
		else
			flags = GDA_DATA_MODEL_ACCESS_CURSOR_FORWARD;

                data_model = (GObject *) _gda_sqlite_recordset_new (cnc, ps, params, flags, col_types, empty_rs);
		GError **exceptions;
		exceptions = gda_data_model_get_exceptions (GDA_DATA_MODEL (data_model));
		if (exceptions && exceptions[0]) {
			GError *e;
			e = g_error_copy (exceptions[0]);
			event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
			gda_connection_event_set_description (event, e->message ? e->message : _("No detail"));
			g_propagate_error (error, e);
			g_object_unref (data_model);
			return NULL;
		}
		else {
			gda_connection_internal_statement_executed (cnc, stmt, params, NULL);
			if (new_ps)
				g_object_unref (ps);
			pending_blobs_free_list (blobs_list);
			return data_model;
		}
        }
	else {
                int status, changes;
                sqlite3 *handle;
		gboolean transaction_started = FALSE;

		if (blobs_list) {
			GError *lerror = NULL;
			if (! _gda_sqlite_check_transaction_started (cdata->gdacnc,
								     &transaction_started, &lerror)) {
				const gchar *errmsg = _("Could not start transaction to create BLOB");
				event = gda_connection_point_available_event (cnc,
									      GDA_CONNECTION_EVENT_ERROR);
				if (lerror) {
					gda_connection_event_set_description (event,
									      lerror && lerror->message ?
									      lerror->message : errmsg);
					g_propagate_error (error, lerror);
				}
				else {
					gda_connection_event_set_description (event, errmsg);
					g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
						     GDA_SERVER_PROVIDER_STATEMENT_EXEC_ERROR, "%s", errmsg);
				}
				if (new_ps)
					g_object_unref (ps);
				pending_blobs_free_list (blobs_list);
				return NULL;
			}
		}

                /* actually execute the command */
                handle = SQLITE3_CALL (sqlite3_db_handle) (ps->sqlite_stmt);
                status = SQLITE3_CALL (sqlite3_step) (ps->sqlite_stmt);
                changes = SQLITE3_CALL (sqlite3_changes) (handle);
                if (status != SQLITE_DONE) {
                        if (SQLITE3_CALL (sqlite3_errcode) (handle) != SQLITE_OK) {
				const char *errmsg;
                                SQLITE3_CALL (sqlite3_reset) (ps->sqlite_stmt);

				errmsg = SQLITE3_CALL (sqlite3_errmsg) (handle);
                                event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_ERROR);
                                gda_connection_event_set_description (event, errmsg);
				g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
					     GDA_SERVER_PROVIDER_STATEMENT_EXEC_ERROR, "%s", errmsg);

                                gda_connection_add_event (cnc, event);
				gda_connection_internal_statement_executed (cnc, stmt, params, event);
				if (new_ps)
					g_object_unref (ps);
				pending_blobs_free_list (blobs_list);
				if (transaction_started)
					gda_connection_rollback_transaction (cdata->gdacnc, NULL, NULL);
				return NULL;
                        }
			else {
				/* could be SQLITE_SCHEMA if database schema has changed and
				 * changes are incompatible with statement */
				TO_IMPLEMENT;
				if (new_ps)
					g_object_unref (ps);
				pending_blobs_free_list (blobs_list);
				if (transaction_started)
					gda_connection_rollback_transaction (cdata->gdacnc, NULL, NULL);
				return NULL;
			}
                }
                else {
			/* fill blobs's data */
			event = fill_blob_data (cnc, params, cdata, ps, blobs_list, error);
			if (event) {
				/* an error occurred */
				SQLITE3_CALL (sqlite3_reset) (ps->sqlite_stmt);
				if (new_ps)
					g_object_unref (ps);
				if (transaction_started)
					gda_connection_rollback_transaction (cdata->gdacnc, NULL, NULL);
				return NULL;
			}
			else if (transaction_started)
				gda_connection_commit_transaction (cdata->gdacnc, NULL, NULL);

			gchar *str = NULL;
			gboolean count_changes = FALSE;

                        if (! g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "DELETE", 6)) {
				count_changes = TRUE;
                                str = g_strdup_printf ("DELETE %d (see SQLite documentation for a \"DELETE * FROM table\" query)",
                                                       changes);
			}
                        else if (! g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "INSERT", 6)) {
				sqlite3_int64 last_id;
				count_changes = TRUE;
				last_id = SQLITE3_CALL (sqlite3_last_insert_rowid) (handle);
				str = g_strdup_printf ("INSERT %lld %d", last_id, changes);
				if (last_inserted_row)
					*last_inserted_row = make_last_inserted_set (cnc, stmt, last_id);
			}
			else if (!g_ascii_strncasecmp (_GDA_PSTMT (ps)->sql, "UPDATE", 6)) {
				count_changes = TRUE;
				str = g_strdup_printf ("UPDATE %d", changes);
			}
			else if (*(_GDA_PSTMT (ps)->sql)) {
				gchar *tmp = g_ascii_strup (_GDA_PSTMT (ps)->sql, -1);
				for (str = tmp; *str && (*str != ' ') && (*str != '\t') &&
					     (*str != '\n'); str++);
				*str = 0;
				if (changes > 0) {
					str = g_strdup_printf ("%s %d", tmp,
							       changes);
					g_free (tmp);
				}
				else
					str = tmp;
			}

			if (str) {
                                event = gda_connection_point_available_event (cnc, GDA_CONNECTION_EVENT_NOTICE);
                                gda_connection_event_set_description (event, str);
                                g_free (str);
                                gda_connection_add_event (cnc, event);
                        }
			gda_connection_internal_statement_executed (cnc, stmt, params, event);
			SQLITE3_CALL (sqlite3_reset) (ps->sqlite_stmt);
			if (new_ps)
				g_object_unref (ps);

			GObject *set;
			if (count_changes) {
				GdaHolder *holder;
				GValue *value;
				GSList *list;

				holder = gda_holder_new (G_TYPE_INT);
				g_object_set ((GObject*) holder, "id", "IMPACTED_ROWS", NULL);
				g_value_set_int ((value = gda_value_new (G_TYPE_INT)), changes);
				gda_holder_take_value (holder, value, NULL);
				list = g_slist_append (NULL, holder);
				set = (GObject*) gda_set_new_read_only (list);
				g_slist_free (list);
				g_object_unref (holder);
			}
			else
				set = (GObject*) gda_set_new_read_only (NULL);

			return set;
		}
	}
}

/*
 * Rewrites a statement in case some parameters in @params are set to DEFAULT, for INSERT or UPDATE statements
 *
 * Removes any default value inserted or updated
 */
static GdaSqlStatement *
gda_sqlite_statement_rewrite (GdaServerProvider *provider, GdaConnection *cnc,
			      GdaStatement *stmt, GdaSet *params, GError **error)
{
	if (cnc) {
		g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
		g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
	}
	return gda_statement_rewrite_for_default_values (stmt, params, TRUE, error);
}

/*
 * SQLite's extra functions' implementations
 */
static void
scalar_gda_file_exists_func (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	const gchar *path;

	if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one argument"), -1);
		return;
	}

	path = (gchar *) SQLITE3_CALL (sqlite3_value_text) (argv [0]);
	if (g_file_test (path, G_FILE_TEST_EXISTS))
		SQLITE3_CALL (sqlite3_result_int) (context, 1);
	else
		SQLITE3_CALL (sqlite3_result_int) (context, 0);
}


static void
scalar_gda_hex_print_func (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	GdaBinary *bin;
	GdaDataHandler *dh;
	GValue *value;
	gchar *str;

	if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one argument"), -1);
		return;
	}

	bin = g_new0 (GdaBinary, 1);
	bin->data = (guchar*) SQLITE3_CALL (sqlite3_value_blob) (argv [0]);
	if (!bin->data) {
		g_free (bin);
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}
	bin->binary_length = SQLITE3_CALL (sqlite3_value_bytes) (argv [0]);
	gda_value_take_binary ((value = gda_value_new (GDA_TYPE_BINARY)), bin);
	dh = gda_data_handler_get_default (GDA_TYPE_BINARY);
	str = gda_data_handler_get_str_from_value (dh, value);

	bin->data = NULL;
	bin->binary_length = 0;
	gda_value_free (value);
	SQLITE3_CALL (sqlite3_result_text) (context, str, -1, g_free);
}

static void
scalar_gda_hex_print_func2 (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	GdaBinary *bin;
	GdaDataHandler *dh;
	GValue *value;
	gchar *str;
	gint size;

	if (argc != 2) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires two arguments"), -1);
		return;
	}

	bin = g_new0 (GdaBinary, 1);
	bin->data = (guchar*) SQLITE3_CALL (sqlite3_value_blob) (argv [0]);
	if (!bin->data) {
		g_free (bin);
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}
	bin->binary_length = SQLITE3_CALL (sqlite3_value_bytes) (argv [0]);
	gda_value_take_binary ((value = gda_value_new (GDA_TYPE_BINARY)), bin);
	dh = gda_data_handler_get_default (GDA_TYPE_BINARY);
	str = gda_data_handler_get_str_from_value (dh, value);

	bin->data = NULL;
	bin->binary_length = 0;
	gda_value_free (value);

	size = SQLITE3_CALL (sqlite3_value_int) (argv [1]);

	SQLITE3_CALL (sqlite3_result_text) (context, str, size, g_free);
}

static void
scalar_rmdiacr (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	gchar *data, *tmp;
	CaseModif ncase = CASE_UNCHANGED;

	if (argc == 2) {
		data = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [1]);
		if ((*data == 'u') || (*data == 'U'))
			ncase = CASE_UP;
		else if ((*data == 'l') || (*data == 'l'))
			ncase = CASE_DOWN;
	}
	else if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one or two arguments"), -1);
		return;
	}

	data = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [0]);
	if (!data) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	tmp = remove_diacritics_and_change_case (data, -1, ncase);
	SQLITE3_CALL (sqlite3_result_text) (context, tmp, -1, g_free);
}

static void
scalar_lower (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	gchar *data, *tmp;

	if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one argument"), -1);
		return;
	}

	data = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [0]);
	if (!data) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	tmp = g_utf8_strdown (data, -1);
	SQLITE3_CALL (sqlite3_result_text) (context, tmp, -1, g_free);
}

static void
scalar_upper (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	gchar *data, *tmp;

	if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one argument"), -1);
		return;
	}

	data = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [0]);
	if (!data) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	tmp = g_utf8_strup (data, -1);
	SQLITE3_CALL (sqlite3_result_text) (context, tmp, -1, g_free);
}

static void
scalar_gda_hex_func (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	guchar *data;
	gint length;
	GString *string;
	gint i;

	if (argc != 1) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires one argument"), -1);
		return;
	}

	data = (guchar*) SQLITE3_CALL (sqlite3_value_blob) (argv [0]);
	if (!data) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	length = SQLITE3_CALL (sqlite3_value_bytes) (argv [0]);
	string = g_string_new ("");
	for (i = 0; i < length; i++) {
		if ((i > 0) && (i % 4 == 0))
			g_string_append_c (string, ' ');
		g_string_append_printf (string, "%02x", data [i]);
	}

	SQLITE3_CALL (sqlite3_result_text) (context, string->str, -1, g_free);
	g_string_free (string, FALSE);
}

static void
scalar_gda_hex_func2 (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	guchar *data;
	gint length;
	GString *string;
	gint i;
	guint size;

	if (argc != 2) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires two arguments"), -1);
		return;
	}

	data = (guchar*) SQLITE3_CALL (sqlite3_value_blob) (argv [0]);
	if (!data) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	length = SQLITE3_CALL (sqlite3_value_bytes) (argv [0]);
	size = SQLITE3_CALL (sqlite3_value_int) (argv [1]);

	string = g_string_new ("");
	for (i = 0; (i < length) && (string->len < (size / 2) * 2 + 2); i++) {
		if ((i > 0) && (i % 4 == 0))
			g_string_append_c (string, ' ');
		g_string_append_printf (string, "%02x", data [i]);
	}

	if (string->len > size)
		string->str[size] = 0;
	SQLITE3_CALL (sqlite3_result_text) (context, string->str, -1, g_free);
	g_string_free (string, FALSE);
}

static void
scalar_regexp_func (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	GRegex *regex = NULL;
	GError *error = NULL;
	const gchar *str, *pattern, *options = NULL;
	GRegexCompileFlags flags = G_REGEX_OPTIMIZE;
	gboolean as_boolean = TRUE;

#define MAX_DEFINED_REGEX 10
	static GArray *re_array = NULL; /* array of signatures (pattern+option) */
	static GHashTable *re_hash = NULL; /* hash of GRegex */

	if ((argc != 2) && (argc != 3)) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires two or three arguments"), -1);
		return;
	}

	str = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [1]);
	if (!str) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	pattern = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [0]);
	if (!pattern) {
		SQLITE3_CALL (sqlite3_result_null) (context);
		return;
	}

	if (argc == 3)
		options = (gchar*) SQLITE3_CALL (sqlite3_value_text) (argv [2]);

	if (options) {
		const gchar *ptr;
		for (ptr = options; *ptr; ptr++) {
			switch (*ptr) {
			case 'i':
			case 'I':
				flags |= G_REGEX_CASELESS;
				break;
			case 'm':
			case 'M':
				flags |= G_REGEX_MULTILINE;
				break;
			case 'v':
			case 'V':
				as_boolean = FALSE;
				break;
			}
		}
	}

	GString *sig;
	sig = g_string_new (pattern);
	g_string_append_c (sig, 0x01);
	if (options && *options)
		g_string_append (sig, options);

	if (re_hash)
		regex = g_hash_table_lookup (re_hash, sig->str);
	if (regex) {
		/*g_print ("FOUND GRegex %p as [%s]\n", regex, sig->str);*/
		g_string_free (sig, TRUE);
	}
	else {
		regex = g_regex_new ((const gchar*) pattern, flags, 0, &error);
		if (! regex) {
			gda_log_error (_("SQLite regexp '%s' error:"), pattern,
				       error && error->message ? error->message : _("Invalid regular expression"));
			g_clear_error (&error);
			if (as_boolean)
				SQLITE3_CALL (sqlite3_result_int) (context, 0);
			else
				SQLITE3_CALL (sqlite3_result_null) (context);

			g_string_free (sig, TRUE);
			return;
		}

		if (!re_array) {
			re_array = g_array_new (FALSE, FALSE, sizeof (gchar*));
			re_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_regex_unref);
		}
		/*g_print ("ADDED new GRegex %p as [%s]\n", regex, sig->str);*/
		g_hash_table_insert (re_hash, sig->str, regex);
		g_array_prepend_val (re_array, sig->str);
		g_string_free (sig, FALSE);
		if (re_array->len > MAX_DEFINED_REGEX) {
			/* get rid of the 'oldest' GRexex */
			gchar *osig;
			osig = g_array_index (re_array, gchar*, re_array->len - 1);
			/*g_print ("REMOVED GRegex [%s]\n", osig);*/
			g_hash_table_remove (re_hash, osig);
			g_array_remove_index (re_array, re_array->len - 1);
		}
	}

	if (as_boolean) {
		if (g_regex_match (regex, str, 0, NULL))
			SQLITE3_CALL (sqlite3_result_int) (context, 1);
		else
			SQLITE3_CALL (sqlite3_result_int) (context, 0);
	}
	else {
		GMatchInfo *match_info;
		g_regex_match (regex, str, 0, &match_info);
		if (g_match_info_matches (match_info)) {
			gchar *word = g_match_info_fetch (match_info, 0);
			SQLITE3_CALL (sqlite3_result_text) (context, word, -1, g_free);
		}
		else
			SQLITE3_CALL (sqlite3_result_null) (context);
		g_match_info_free (match_info);
	}
}

static void
scalar_regexp_match_func (sqlite3_context *context, int argc, sqlite3_value **argv)
{
	if ((argc != 2) && (argc != 3)) {
		SQLITE3_CALL (sqlite3_result_error) (context, _("Function requires two or three arguments"), -1);
		return;
	}

	sqlite3_value **nargv;
	nargv = g_new (sqlite3_value*, argc);
	nargv[0] = argv[1];
	nargv[1] = argv[0];
	if (argc == 3)
		nargv[2] = argv[2];
	scalar_regexp_func (context, argc, nargv);
	g_free (nargv);
}

static void
gda_sqlite_free_cnc_data (SqliteConnectionData *cdata)
{
	if (!cdata)
		return;

	if (cdata->gdacnc)
		g_object_remove_weak_pointer (G_OBJECT (cdata->gdacnc), (gpointer*) &(cdata->gdacnc));
	if (cdata->connection)
		SQLITE3_CALL (sqlite3_close) (cdata->connection);
	g_free (cdata->file);
	if (cdata->types_hash)
		g_hash_table_destroy (cdata->types_hash);
	if (cdata->types_array)
		g_free (cdata->types_array);
	g_free (cdata);
}

static gchar *
gda_sqlite_provider_escape_string (G_GNUC_UNUSED GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc, const gchar *string)
{
	gchar *ptr, *ret, *retptr;
	gint size;

	if (!string)
		return NULL;

	/* determination of the new string size */
	ptr = (gchar *) string;
	size = 1;
	while (*ptr) {
		if (*ptr == '\'')
			size += 2;
		else
			size += 1;
		ptr++;
	}

	ptr = (gchar *) string;
	ret = g_new0 (gchar, size);
	retptr = ret;
	while (*ptr) {
		if (*ptr == '\'') {
			*retptr = '\'';
			*(retptr+1) = *ptr;
			retptr += 2;
		}
		else {
			*retptr = *ptr;
			retptr ++;
		}
		ptr++;
	}
	*retptr = '\0';

	return ret;
}

gchar *
gda_sqlite_provider_unescape_string (G_GNUC_UNUSED GdaServerProvider *provider, G_GNUC_UNUSED GdaConnection *cnc, const gchar *string)
{
	glong total;
	gchar *ptr;
	gchar *retval;
	glong offset = 0;

	if (!string)
		return NULL;

	total = strlen (string);
	retval = g_memdup (string, total+1);
	ptr = (gchar *) retval;
	while (offset < total) {
		if (*ptr == '\'') {
			if (*(ptr+1) == '\'') {
				g_memmove (ptr+1, ptr+2, total - offset);
				offset += 2;
			}
			else {
				g_free (retval);
				return NULL;
			}
		}
		else
			offset ++;

		ptr++;
	}

	return retval;
}
