TableMapper::InboundTableMapperIterator Class Reference

provides a hash iterator based on a InboundTableMapper object and an iterator input source; for each iteration the iterted row is inserted into the Table target More...

Inherits AbstractMapperIterator.

## Public Member Functions

nothing | commit ()
| commits the transaction
int | commitLimit ()
| returns the commit_limit value set in the constructor()
| constructor (Qore::AbstractIterator i, InboundTableMapper mapper)
| creates the iterator from the mapper passed More...
| constructor (Qore::AbstractIterator i, SqlUtil::AbstractTable target, hash< auto > mapv, *hash< auto > opts, int commit_limit=0)
| creates the iterator from the arguments passed More...
| constructor (Qore::AbstractIterator i, SqlUtil::Table target, hash< auto > mapv, *hash< auto > opts, int commit_limit=0)
| creates the iterator from the arguments passed More...
| constructor (Qore::AbstractIterator i, TableMapper::InboundTableMapper mapv, int commit_limit)
| creates the iterator from the arguments passed More...
int | getCount ()
| returns the internal record count More...
Qore::SQL::AbstractDatasource | getDatasource ()
| returns the AbstractDatasource object associated with this object
auto | getRuntime (string key)
| get current runtime option value for a key More...
string | getTableName ()
| returns the table name
hash< auto > | getValue ()
| returns the current row transformed with the mapper
bool | next ()
| Moves the current position of the input iterator to the next element; returns False if there are no more elements otherwise inserts the row in the target table and returns True. More...
| replaceRuntime (*hash< auto > runtime)
| replaces runtime options More...
| resetCount ()
| resets the internal record count More...
nothing | rollback ()
| rolls back the transaction
| setRuntime (hash< auto > runtime)
| adds runtime options to the current runtime option hash More...
| setRuntime (string key, auto value)
| set the runtime option with "key" to value "value" More...

## Protected Attributes

int | cnt = 0
| row count for commit
int | commit_limit
| row commit limit (<= 0 for no commits)
TableMapper::InboundTableMapper | mapc
| data mapper
hash< auto > | val
| a copy of the last hash value mapped

## Detailed Description

provides a hash iterator based on a InboundTableMapper object and an iterator input source; for each iteration the iterted row is inserted into the Table target

## Member Function Documentation

## constructor() [1/4]

TableMapper::InboundTableMapperIterator::constructor | ( | Qore::AbstractIterator | i,
|  | InboundTableMapper | mapper
| ) |  |

creates the iterator from the mapper passed

Parameters

  i | input iterator; AbstractIterator::getValue() must return a hash
  mapper | the mapper object that the iterator will be based on

Since
  TableMapper 1.1.1

## constructor() [2/4]

TableMapper::InboundTableMapperIterator::constructor | ( | Qore::AbstractIterator | i,
|  | SqlUtil::AbstractTable | target,
|  | hash< auto > | mapv,
|  | *hash< auto > | opts,
|  | int | commit_limit = `0`
| ) |  |

creates the iterator from the arguments passed

The target table is also scanned using SqlUtil and column definitions are used to update the target record specification, also if there are any columns with NOT NULL constraints and no default value, mapping, or constant value, then a MAP-ERROR exception is thrown

Example:
  const DbMapper = (
  "id": ("sequence": "seq_inventory_example"),
  "store_code": "StoreCode",
  "product_code": "ProductCode",
  "product_desc": "ProductDescription",
  "ordered": "Ordered",
  "available": "Available",
  "in_transit": "InTransit",
  "status": ("constant": "01"),
  "total": int sub (any x, hash rec) { return rec.Available.toInt() + rec.Ordered.toInt() + rec.InTransit.toInt(); },
  );
  InboundTableMapperIterator i(input, table, DbMapper);

Parameters

  i | input iterator; AbstractIterator::getValue() must return a hash
  target | the target table object
  mapv | a hash providing field mappings; each hash key is the name of the output column in lower case in the target table; each value is either True (meaning no translations are done; the data is copied 1:1) or a hash describing the mapping; see mapperkeys for detailed documentation for this option
  opts | an optional hash of options for the mapper; see mapperoptions for a description of valid mapper options; note that options related to bulk DML are ignored by this object since it works on one row at a time
  commit_limit | row count before a commit is made; if <= 0 then no commits are made by this object, otherwise a commit is made for each commit_limit rows processed by this object, commits are made in calls to next()

Note
  by default commit_limit is 0 meaning that this object will make no commits; in this case the transaction will have to be commited explicitly externally

## constructor() [3/4]

TableMapper::InboundTableMapperIterator::constructor | ( | Qore::AbstractIterator | i,
|  | SqlUtil::Table | target,
|  | hash< auto > | mapv,
|  | *hash< auto > | opts,
|  | int | commit_limit = `0`
| ) |  |

creates the iterator from the arguments passed

The target table is also scanned using SqlUtil and column definitions are used to update the target record specification, also if there are any columns with NOT NULL constraints and no default value, mapping, or constant value, then a MAP-ERROR exception is thrown

Example:
  const DbMapper = (
  "id": ("sequence": "seq_inventory_example"),
  "store_code": "StoreCode",
  "product_code": "ProductCode",
  "product_desc": "ProductDescription",
  "ordered": "Ordered",
  "available": "Available",
  "in_transit": "InTransit",
  "status": ("constant": "01"),
  "total": int sub (any x, hash rec) { return rec.Available.toInt() + rec.Ordered.toInt() + rec.InTransit.toInt(); },
  );
  InboundTableMapperIterator i(input, table, DbMapper);

Parameters

  i | input iterator; AbstractIterator::getValue() must return a hash
  target | the target table object
  mapv | a hash providing field mappings; each hash key is the name of the output column in lower case in the target table; each value is either True (meaning no translations are done; the data is copied 1:1) or a hash describing the mapping; see mapperkeys for detailed documentation for this option
  opts | an optional hash of options for the mapper; see mapperoptions for a description of valid mapper options; note that options related to bulk DML are ignored by this object since it works on one row at a time
  commit_limit | row count before a commit is made; if <= 0 then no commits are made by this object, otherwise a commit is made for each commit_limit rows processed by this object, commits are made in calls to next()

Note
  by default commit_limit is 0 meaning that this object will make no commits; in this case the transaction will have to be commited explicitly externally

## constructor() [4/4]

TableMapper::InboundTableMapperIterator::constructor | ( | Qore::AbstractIterator | i,
|  | TableMapper::InboundTableMapper | mapv,
|  | int | commit_limit
| ) |  |

creates the iterator from the arguments passed

The target table is also scanned using SqlUtil and column definitions are used to update the target record specification, also if there are any columns with NOT NULL constraints and no default value, mapping, or constant value, then a MAP-ERROR exception is thrown

Example:
  const DbMapper = (
  "id": ("sequence": "seq_inventory_example"),
  "store_code": "StoreCode",
  "product_code": "ProductCode",
  "product_desc": "ProductDescription",
  "ordered": "Ordered",
  "available": "Available",
  "in_transit": "InTransit",
  "total": int sub (any x, hash rec) { return rec.Available.toInt() + rec.Ordered.toInt() + rec.InTransit.toInt(); },
  );
  InboundTableMapper mapper(table, DbMapper);
  InboundTableMapperIterator i(input, mapper);

Parameters

  i | input iterator; AbstractIterator::getValue() must return a hash
  mapv | the mapper to transform the data
  commit_limit | row count before a commit is made; if <= 0 then no commits are made by this object, otherwise a commit is made for each commit_limit rows processed by this object, commits are made in calls to next()

## getCount()

int TableMapper::InboundTableMapperIterator::getCount | ( |  | ) |

returns the internal record count

See also
  resetCount()

## getRuntime()

auto TableMapper::InboundTableMapperIterator::getRuntime | ( | string | key | ) |

get current runtime option value for a key

Parameters

  key | the runtime option key

Returns
  a runtime value if the key exists in the current runtime option hash and is set

See also
  - mapper_runtime_handling
  - replaceRuntime()
  - setRuntime()

Since
  TableMapper 1.1.1

## next()

bool TableMapper::InboundTableMapperIterator::next | ( |  | ) |

Moves the current position of the input iterator to the next element; returns False if there are no more elements otherwise inserts the row in the target table and returns True.

if commit_limit is > 0 then TableMapper::InboundTableMapper::commit() is called for every commit_limit rows according to the internal row count

Returns
  False if there are no more elements, in this case if there is an uncommitted transaction according to the internal row count, then TableMapper::InboundTableMapper::commit() is called as well

## replaceRuntime()

TableMapper::InboundTableMapperIterator::replaceRuntime | ( | *hash< auto > | runtime | ) |

replaces runtime options

Parameters

  runtime | a hash of runtime options to use to replace the current runtime option hash

See also
  - mapper_runtime_handling
  - getRuntime()
  - setRuntime()

Since
  TableMapper 1.1.1

## resetCount()

TableMapper::InboundTableMapperIterator::resetCount | ( |  | ) |

resets the internal record count

See also
  getCount()

## setRuntime() [1/2]

TableMapper::InboundTableMapperIterator::setRuntime | ( | hash< auto > | runtime | ) |

adds runtime options to the current runtime option hash

Parameters

  runtime | a hash of runtime options to add to the current runtime option hash

See also
  - mapper_runtime_handling
  - replaceRuntime()
  - getRuntime()

Since
  TableMapper 1.1.1

## setRuntime() [2/2]

TableMapper::InboundTableMapperIterator::setRuntime | ( | string | key,
|  | auto | value
| ) |  |

set the runtime option with "key" to value "value"

Parameters

  key | a string with valid runtime key
  value | anything passed to the current runtime `key`

See also
  - mapper_runtime_handling
  - replaceRuntime()
  - getRuntime()

Since
  TableMapper 1.1.1