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DBI.h
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1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 DBI.h
4
5 Qore Programming Language
6
7 Copyright 2003 - 2014 David Nichols
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #ifndef _QORE_DBI_H
25 #define _QORE_DBI_H
26
28
29 // DBI Driver capabilities
30 #define DBI_CAP_NONE 0
31 #define DBI_CAP_TIME_ZONE_SUPPORT (1 << 0)
32 #define DBI_CAP_CHARSET_SUPPORT (1 << 1)
33 #define DBI_CAP_TRANSACTION_MANAGEMENT (1 << 2)
34 #define DBI_CAP_STORED_PROCEDURES (1 << 3)
35 #define DBI_CAP_LOB_SUPPORT (1 << 4)
36 #define DBI_CAP_BIND_BY_VALUE (1 << 5)
37 #define DBI_CAP_BIND_BY_PLACEHOLDER (1 << 6)
38 #define DBI_CAP_HAS_EXECRAW (1 << 7)
39 #define DBI_CAP_HAS_STATEMENT (1 << 8)
40 #define DBI_CAP_HAS_SELECT_ROW (1 << 9)
41 #define DBI_CAP_HAS_NUMBER_SUPPORT (1 << 10)
42 #define DBI_CAP_HAS_OPTION_SUPPORT (1 << 11)
43 #define DBI_CAP_SERVER_TIME_ZONE (1 << 12)
44 #define DBI_CAP_AUTORECONNECT (1 << 13)
45 #define DBI_CAP_EVENTS (1 << 14)
46 #define DBI_CAP_HAS_DESCRIBE (1 << 15)
47
48 #define BN_PLACEHOLDER 0
49 #define BN_VALUE 1
50
51 #define DBI_DEFAULT_STR_LEN 512
52
53 // DBI method codes
54 #define QDBI_METHOD_OPEN 1
55 #define QDBI_METHOD_CLOSE 2
56 #define QDBI_METHOD_SELECT 3
57 #define QDBI_METHOD_SELECT_ROWS 4
58 #define QDBI_METHOD_EXEC 5
59 #define QDBI_METHOD_COMMIT 6
60 #define QDBI_METHOD_ROLLBACK 7
61 #define QDBI_METHOD_BEGIN_TRANSACTION 8
62 #define QDBI_METHOD_ABORT_TRANSACTION_START 9
63 #define QDBI_METHOD_GET_SERVER_VERSION 10
64 #define QDBI_METHOD_GET_CLIENT_VERSION 11
65 #define QDBI_METHOD_EXECRAW 12
66 #define QDBI_METHOD_STMT_PREPARE 13
67 #define QDBI_METHOD_STMT_PREPARE_RAW 14
68 #define QDBI_METHOD_STMT_BIND 15
69 #define QDBI_METHOD_STMT_BIND_PLACEHOLDERS 16
70 #define QDBI_METHOD_STMT_BIND_VALUES 17
71 #define QDBI_METHOD_STMT_EXEC 18
72 #define QDBI_METHOD_STMT_FETCH_ROW 19
73 #define QDBI_METHOD_STMT_FETCH_ROWS 20
74 #define QDBI_METHOD_STMT_FETCH_COLUMNS 21
75 #define QDBI_METHOD_STMT_NEXT 22
76 #define QDBI_METHOD_STMT_CLOSE 23
77 #define QDBI_METHOD_STMT_AFFECTED_ROWS 24
78 #define QDBI_METHOD_STMT_GET_OUTPUT 25
79 #define QDBI_METHOD_STMT_GET_OUTPUT_ROWS 26
80 #define QDBI_METHOD_STMT_DEFINE 27
81 #define QDBI_METHOD_SELECT_ROW 28
82 #define QDBI_METHOD_OPT_SET 29
83 #define QDBI_METHOD_OPT_GET 30
84 #define QDBI_METHOD_STMT_DESCRIBE 31
85 #define QDBI_METHOD_DESCRIBE 32
86
87 #define QDBI_VALID_CODES 32
88
89 /* DBI EVENT Types
90 all DBI events must have the following keys:
91 - user: db username (if available)
92 - db: db name (if available)
93 - eventtype: integer event code
94 */
95 // warning events have the following additional keys: warning, desc, [info]
96 #define QDBI_EVENT_WARNING 1
97
98 class Datasource;
99 class ExceptionSink;
100 class QoreString;
101 class QoreListNode;
102 class AbstractQoreNode;
103 class QoreHashNode;
104 class QoreNamespace;
105 class SQLStatement;
106
107 // DBI method signatures - note that only get_client_version uses a "const Datasource"
108 // the others do not so that automatic reconnects can be supported (which will normally
109 // require writing to the Datasource)
110
112
116 typedef int (*q_dbi_open_t)(Datasource* ds, ExceptionSink* xsink);
117
119
123 typedef int (*q_dbi_close_t)(Datasource* ds);
124
126
133 typedef AbstractQoreNode* (*q_dbi_select_t)(Datasource* ds, const QoreString* str, const QoreListNode* args, ExceptionSink* xsink);
134
136
143 typedef AbstractQoreNode* (*q_dbi_select_rows_t)(Datasource* ds, const QoreString* str, const QoreListNode* args, ExceptionSink* xsink);
144
146
154 typedef QoreHashNode* (*q_dbi_select_row_t)(Datasource* ds, const QoreString* str, const QoreListNode* args, ExceptionSink* xsink);
155
157
164 typedef AbstractQoreNode* (*q_dbi_exec_t)(Datasource* ds, const QoreString* str, const QoreListNode* args, ExceptionSink* xsink);
165
167
173 typedef AbstractQoreNode* (*q_dbi_execraw_t)(Datasource* ds, const QoreString* str, ExceptionSink* xsink);
174
176
181 typedef int (*q_dbi_commit_t)(Datasource* ds, ExceptionSink* xsink);
182
184
189 typedef int (*q_dbi_rollback_t)(Datasource* ds, ExceptionSink* xsink);
190
192
197 typedef int (*q_dbi_begin_transaction_t)(Datasource* ds, ExceptionSink* xsink);
198
200
205 typedef int (*q_dbi_abort_transaction_start_t)(Datasource* ds, ExceptionSink* xsink);
206
208
213 typedef AbstractQoreNode* (*q_dbi_get_server_version_t)(Datasource* ds, ExceptionSink* xsink);
214
216
221 typedef AbstractQoreNode* (*q_dbi_get_client_version_t)(const Datasource* ds, ExceptionSink* xsink);
222
223 // FIXME: document
225
227 typedef int (*q_dbi_stmt_prepare_t)(SQLStatement* stmt, const QoreString& str, const QoreListNode* args, ExceptionSink* xsink);
228
230
232 typedef int (*q_dbi_stmt_prepare_raw_t)(SQLStatement* stmt, const QoreString& str, ExceptionSink* xsink);
233
235
237 typedef int (*q_dbi_stmt_bind_t)(SQLStatement* stmt, const QoreListNode& l, ExceptionSink* xsink);
238
240
242 typedef int (*q_dbi_stmt_exec_t)(SQLStatement* stmt, ExceptionSink* xsink);
243
245
247 typedef int (*q_dbi_stmt_affected_rows_t)(SQLStatement* stmt, ExceptionSink* xsink);
248
250
252 typedef QoreHashNode* (*q_dbi_stmt_get_output_t)(SQLStatement* stmt, ExceptionSink* xsink);
253
255
257 typedef QoreHashNode* (*q_dbi_stmt_get_output_rows_t)(SQLStatement* stmt, ExceptionSink* xsink);
258
259 typedef int (*q_dbi_stmt_define_t)(SQLStatement* stmt, ExceptionSink* xsink);
260 typedef QoreHashNode* (*q_dbi_stmt_fetch_row_t)(SQLStatement* stmt, ExceptionSink* xsink);
261 typedef QoreHashNode* (*q_dbi_stmt_fetch_columns_t)(SQLStatement* stmt, int rows, ExceptionSink* xsink);
262 typedef QoreListNode* (*q_dbi_stmt_fetch_rows_t)(SQLStatement* stmt, int rows, ExceptionSink* xsink);
263 typedef bool (*q_dbi_stmt_next_t)(SQLStatement* stmt, ExceptionSink* xsink);
264 typedef int (*q_dbi_stmt_close_t)(SQLStatement* stmt, ExceptionSink* xsink);
265
266 typedef int (*q_dbi_option_set_t)(Datasource* ds, const char* opt, const AbstractQoreNode* val, ExceptionSink* xsink);
267 typedef AbstractQoreNode* (*q_dbi_option_get_t)(const Datasource* ds, const char* opt);
268
270
277 typedef QoreHashNode* (*q_dbi_describe_t)(Datasource* ds, const QoreString* str, const QoreListNode* args, ExceptionSink* xsink);
278
279 #define DBI_OPT_NUMBER_OPT "optimal-numbers"
280 #define DBI_OPT_NUMBER_STRING "string-numbers"
281 #define DBI_OPT_NUMBER_NUMERIC "numeric-numbers"
282 #define DBI_OPT_TIMEZONE "timezone"
283
284
287 class qore_dbi_method_list {
288 friend struct qore_dbi_mlist_private;
289
290 private:
291 struct qore_dbi_mlist_private* priv; // private implementation
292
293 // not implemented
294 DLLLOCAL qore_dbi_method_list(const qore_dbi_method_list&);
295 DLLLOCAL qore_dbi_method_list& operator=(const qore_dbi_method_list&);
296
297 public:
298 DLLEXPORT qore_dbi_method_list();
299 DLLEXPORT ~qore_dbi_method_list();
300
301 // covers open, commit, rollback, and begin transaction
302 DLLEXPORT void add(int code, q_dbi_open_t method);
303 // for close
304 DLLEXPORT void add(int code, q_dbi_close_t method);
305 // covers select, select_rows, select, and exec
306 DLLEXPORT void add(int code, q_dbi_select_t method);
307 // covers select_row
308 DLLEXPORT void add(int code, q_dbi_select_row_t method);
309 // covers execRaw
310 DLLEXPORT void add(int code, q_dbi_execraw_t method);
311 // covers get_server_version
312 DLLEXPORT void add(int code, q_dbi_get_server_version_t method);
313 // covers get_client_version
314 DLLEXPORT void add(int code, q_dbi_get_client_version_t method);
315
316 // covers prepare
317 DLLEXPORT void add(int code, q_dbi_stmt_prepare_t method);
318 // covers prepare_raw
319 DLLEXPORT void add(int code, q_dbi_stmt_prepare_raw_t method);
320 // covers bind, bind_placeholders, bind_values
321 DLLEXPORT void add(int code, q_dbi_stmt_bind_t method);
322 // covers exec, close, affected_rows, and define
323 DLLEXPORT void add(int code, q_dbi_stmt_exec_t method);
324 // covers fetch_row, get_output, and get_output_rows
325 DLLEXPORT void add(int code, q_dbi_stmt_fetch_row_t method);
326 // covers fetch_columns
327 DLLEXPORT void add(int code, q_dbi_stmt_fetch_columns_t method);
328 // covers fetch_rows
329 DLLEXPORT void add(int code, q_dbi_stmt_fetch_rows_t method);
330 // covers next
331 DLLEXPORT void add(int code, q_dbi_stmt_next_t method);
332
333 // covers set option
334 DLLEXPORT void add(int code, q_dbi_option_set_t method);
335 // covers get option
336 DLLEXPORT void add(int code, q_dbi_option_get_t method);
337
338 // for registering valid options
339 DLLEXPORT void registerOption(const char* name, const char* desc, const QoreTypeInfo* type = 0);
340 };
341
343
348 class DBIDriver {
349 friend struct qore_dbi_private;
350
351 private:
353 struct qore_dbi_private* priv;
354
356 DLLLOCAL DBIDriver(const DBIDriver&);
358 DLLLOCAL DBIDriver& operator=(const DBIDriver&);
359
360 public:
362
365 DLLEXPORT const char* getName() const;
366
368 DLLEXPORT bool hasStatementAPI() const;
369
371
377 DLLEXPORT QoreHashNode* getOptionHash() const;
378
379 DLLLOCAL DBIDriver(struct qore_dbi_private* p);
380 DLLLOCAL ~DBIDriver();
381 };
382
383 struct qore_dbi_dlist_private;
384
386
390 class DBIDriverList {
391 private:
393 struct qore_dbi_dlist_private *priv;
394
395 DLLLOCAL DBIDriver* find_intern(const char* name) const;
396
397 public:
399
406 DLLEXPORT DBIDriver* registerDriver(const char* name, const qore_dbi_method_list &methods, int caps);
407
409
416 DLLEXPORT DBIDriver* find(const char* name) const;
417
419
427 DLLEXPORT DBIDriver* find(const char* name, ExceptionSink* xsink) const;
428
429 DLLLOCAL DBIDriverList();
430 DLLLOCAL ~DBIDriverList();
431 DLLLOCAL QoreListNode* getDriverList() const;
432 };
433
435 DLLEXPORT extern DBIDriverList DBI;
436
438 DLLEXPORT QoreHashNode* parseDatasource(const char* ds, ExceptionSink* xsink);
439
441 DLLEXPORT void DBI_concat_numeric(QoreString* str, const AbstractQoreNode* v);
442
444
447 DLLEXPORT int DBI_concat_string(QoreString* str, const AbstractQoreNode* v, ExceptionSink* xsink);
448
449 #endif // _QORE_DBI_H
q_dbi_open_t
int(* q_dbi_open_t)(Datasource *ds, ExceptionSink *xsink)
signature for the DBI &quot;open&quot; method - must be defined in each DBI driver
Definition: DBI.h:116
q_dbi_get_client_version_t
AbstractQoreNode *(* q_dbi_get_client_version_t)(const Datasource *ds, ExceptionSink *xsink)
signature for the &quot;get_client_version&quot; method
Definition: DBI.h:221
QoreHashNode
This is the hash or associative list container type in Qore, dynamically allocated only...
Definition: QoreHashNode.h:41
AbstractQoreNode
The base class for all value and parse types in Qore expression trees.
Definition: AbstractQoreNode.h:47
q_dbi_select_row_t
QoreHashNode *(* q_dbi_select_row_t)(Datasource *ds, const QoreString *str, const QoreListNode *args, ExceptionSink *xsink)
signature for the DBI &quot;selectRow&quot; method - must be defined in each DBI driver
Definition: DBI.h:154
QoreNamespace
contains constants, classes, and subnamespaces in QoreProgram objects
Definition: QoreNamespace.h:50
DBIDriver
this class provides the internal link to the database driver for Qore&#39;s DBI layer ...
Definition: DBI.h:348
DBIDriver::hasStatementAPI
DLLEXPORT bool hasStatementAPI() const
returns true if the driver supports the statement API
q_dbi_abort_transaction_start_t
int(* q_dbi_abort_transaction_start_t)(Datasource *ds, ExceptionSink *xsink)
signature for the rollback method to be executed when the first statement in an explicit transaction ...
Definition: DBI.h:205
DBIDriver::getOptionHash
DLLEXPORT QoreHashNode * getOptionHash() const
returns the valid options for this driver with descriptions
QoreString
Qore&#39;s string type supported by the QoreEncoding class.
Definition: QoreString.h:42
q_dbi_rollback_t
int(* q_dbi_rollback_t)(Datasource *ds, ExceptionSink *xsink)
signature for the DBI &quot;rollback&quot; method - must be defined in each DBI driver
Definition: DBI.h:189
q_dbi_execraw_t
AbstractQoreNode *(* q_dbi_execraw_t)(Datasource *ds, const QoreString *str, ExceptionSink *xsink)
signature for the DBI &quot;execRawSQL&quot; method - must be defined in each DBI driver
Definition: DBI.h:173
q_dbi_stmt_bind_t
int(* q_dbi_stmt_bind_t)(SQLStatement *stmt, const QoreListNode &l, ExceptionSink *xsink)
bind input values and optionally describe output parameters
Definition: DBI.h:237
QoreListNode
This is the list container type in Qore, dynamically allocated only, reference counted.
Definition: QoreListNode.h:44
DBI
DLLEXPORT DBIDriverList DBI
list of DBI drivers currently reigsted by the Qore library
q_dbi_close_t
int(* q_dbi_close_t)(Datasource *ds)
signature for the DBI &quot;close&quot; method - must be defined in each DBI driver
Definition: DBI.h:123
Datasource
the base class for accessing databases in Qore through a Qore DBI driver
Definition: Datasource.h:46
q_dbi_get_server_version_t
AbstractQoreNode *(* q_dbi_get_server_version_t)(Datasource *ds, ExceptionSink *xsink)
signature for the &quot;get_server_version&quot; method
Definition: DBI.h:213
DBIDriver::getName
DLLEXPORT const char * getName() const
this is the only public exported function available in this class
qore_dbi_method_list
this is the data structure Qore DBI drivers will use to pass the supported DBI methods ...
Definition: DBI.h:287
SQLStatement
This is the public class for DBI drivers supporting Qore&#39;s new prepared statement API...
Definition: SQLStatement.h:32
q_dbi_commit_t
int(* q_dbi_commit_t)(Datasource *ds, ExceptionSink *xsink)
signature for the DBI &quot;commit&quot; method - must be defined in each DBI driver
Definition: DBI.h:181
ExceptionSink
container for holding Qore-language exception information and also for registering a &quot;thread_exit&quot; ca...
Definition: ExceptionSink.h:35
q_dbi_select_t
AbstractQoreNode *(* q_dbi_select_t)(Datasource *ds, const QoreString *str, const QoreListNode *args, ExceptionSink *xsink)
signature for the DBI &quot;select&quot; method - must be defined in each DBI driver
Definition: DBI.h:133
DBIDriverList::registerDriver
DLLEXPORT DBIDriver * registerDriver(const char *name, const qore_dbi_method_list &methods, int caps)
registers a new DBI driver
q_dbi_begin_transaction_t
int(* q_dbi_begin_transaction_t)(Datasource *ds, ExceptionSink *xsink)
signature for the DBI &quot;begin_transaction&quot; method, should only be defined for drivers needing this to ...
Definition: DBI.h:197
q_dbi_stmt_exec_t
int(* q_dbi_stmt_exec_t)(SQLStatement *stmt, ExceptionSink *xsink)
execute statement
Definition: DBI.h:242
DBIDriverList
this class is used to register and find DBI drivers loaded in qore
Definition: DBI.h:390
q_dbi_stmt_prepare_raw_t
int(* q_dbi_stmt_prepare_raw_t)(SQLStatement *stmt, const QoreString &str, ExceptionSink *xsink)
prepare statement with no bind parsing
Definition: DBI.h:232
q_dbi_stmt_affected_rows_t
int(* q_dbi_stmt_affected_rows_t)(SQLStatement *stmt, ExceptionSink *xsink)
get number of affected rows
Definition: DBI.h:247
parseDatasource
DLLEXPORT QoreHashNode * parseDatasource(const char *ds, ExceptionSink *xsink)
parses a datasource string and returns a hash of the component parts
DBI_concat_numeric
DLLEXPORT void DBI_concat_numeric(QoreString *str, const AbstractQoreNode *v)
concatenates a numeric value to the QoreString from the QoreNode
DBIDriverList::find
DLLEXPORT DBIDriver * find(const char *name) const
finds a driver, will try to load the driver using the ModuleManager if no such driver is already pres...
q_dbi_stmt_prepare_t
int(* q_dbi_stmt_prepare_t)(SQLStatement *stmt, const QoreString &str, const QoreListNode *args, ExceptionSink *xsink)
prepare statement and process placeholder specifications and bind parameters
Definition: DBI.h:227
DBI_concat_string
DLLEXPORT int DBI_concat_string(QoreString *str, const AbstractQoreNode *v, ExceptionSink *xsink)
concatenates a string value to the QoreString from the AbstractQoreNode