The database data provider class, provides tables as children. More...

#include <DbDataProvider.qc.dox.h>

Inherits AbstractDataProvider.

Public Member Methods
	beginTransaction ()
	Begins a transaction in the datasource. More...

	commit ()
	Commits any transaction in progress in the datasource. More...

	constructor (*hash< auto > options)
	Creates the object from constructor options.

	constructor (AbstractDatabase db)
	creates the object

	constructor (AbstractDatasource ds, *hash< auto > opts)
	creates the object

private AbstractDataProvider	createChildProviderImpl (string name, hash< string, AbstractDataField > fields, *hash< auto > child_create_options)
	Creates a new child data provider and returns it after adding as a child. More...

int	doSequenceCurrvalKey (string sequence_name, hash< auto > ctx, *reference< bool > missing_input)
	Processes the `sequence_currval` runtime key in mappers as a mapper key handler.

int	doSequenceKey (string sequence_name, hash< auto > ctx, *reference< bool > missing_input)
	Processes the `sequence` runtime key in mappers as a mapper key handler.

*list< hash< DataProviderSummaryInfo > >	getChildProviderSummaryInfo ()
	Return data provider summary info.

*string	getDesc ()
	Returns the data provider description.

*hash< string, hash< MapperRuntimeKeyInfo > >	getMapperRuntimeKeys ()
	Returns custom data mapper runtime keys. More...

string	getName ()
	Returns the data provider name.

hash< auto >	makeTableDesc (string name, hash< string, AbstractDataField > fields, *hash< auto > opts)
	Returns a table description hash from a field description. More...

	rollback ()
	Rolls back any transaction in progress in the datasource. More...

private AbstractDataProviderBulkRecordInterface	searchRecordsBulkImpl (int block_size=1000, hash< auto > where_cond, hash< auto > search_options)
	Returns an iterator for zero or more records matching the search options. More...

Static Public Member Methods
static hash< GenericColumnInfo >	getColumnDesc (AbstractDatabase db, AbstractDataField field, *hash< auto > opts)
	Returns a column description hash for a field.

static AbstractDatasource	getDatasource (AbstractDatasource ds)
	Returns the given AbstractDatasource object.

static AbstractDatasource	getDatasource (string ds_string)
	Returns an AbstractDatasource object from the given string.

static *hash< string, AbstractDataField >	getRecordTypeFromDescribeHash (hash< auto > describe_hash)
	Returns the record type description from a describe hash. More...

static AbstractTable	getTable (AbstractDatasource ds, string table_string)
	Returns an AbstractTable object from the given datasource and table arguments.

static AbstractTable	getTable (string ds_string, string table_string)
	Returns an AbstractTable object from the given datasource and table strings.

static	setDatasourceLookup (code datasource_lookup)
	Sets the datasource lookup.

static	setTableLookup (code table_lookup)
	Sets the table lookup.

Public Attributes
const	ChildCreateOptions
	Child provider creation options.

const	ConstructorOptions
	Constructor options.

const	MapperKeyInfo
	Mapper runtime key info; see details below. More...

const	ProviderInfo
	Provider info.

const	SearchOptions
	Search options.

Private Member Methods
	deleteChildProviderImpl (string name, *hash< auto > child_delete_options)
	Deletes a child data provider. More...

*AbstractDataProvider	getChildProviderImpl (string name)
	Returns the given child provider or NOTHING if the given child is unknown. More...

*list< string >	getChildProviderNamesImpl ()
	Returns a list of child data provider names, if any. More...

*hash< string, AbstractDataField >	getRecordTypeImpl (*hash< auto > search_options)
	Returns the description of the record type, if any. More...

hash< DataProviderInfo >	getStaticInfoImpl ()
	Returns data provider static info.

AbstractDataProviderRecordIterator	searchRecordsImpl (hash< auto > where_cond, hash< auto > search_options)
	Returns an iterator for zero or more records matching the search options. More...

Private Attributes
AbstractDatabase	db
	The database object.

Static Private Attributes
static *code	datasource_lookup
	Lookup to get an abstract datasource from a name.

static *code	table_lookup
	Lookup to get an abstract table from a datasource and a name.

Detailed Description

The database data provider class, provides tables as children.

Generic post-SQL search is provided just for completeness sake, but record filtering should be done in the sql search option and not in the generic post-SQL generic data provider search for performance reasons.

Member Function Documentation

◆ beginTransaction()

DbDataProvider::DbDataProvider::beginTransaction ( )

Begins a transaction in the datasource.

See also

:

Since: DbDataProvider 1.0.1

◆ commit()

DbDataProvider::DbDataProvider::commit ( )

Commits any transaction in progress in the datasource.

See also

:

◆ createChildProviderImpl()

private AbstractDataProvider DbDataProvider::DbDataProvider::createChildProviderImpl	(	string	name,
		hash< string, AbstractDataField >	fields,
		*hash< auto >	child_create_options
	)

inline

Creates a new child data provider and returns it after adding as a child.

Parameters

name	the name of the new child data provider
fields	the fields for the new child data provider
child_create_options	the options for creating the new child data provider

Returns: the new child data provider

Since: DataProvider 2.0

◆ deleteChildProviderImpl()

DbDataProvider::DbDataProvider::deleteChildProviderImpl	(	string	name,
		*hash< auto >	child_delete_options
	)

private

Deletes a child data provider.

Parameters

name	the name of the new child data provider
child_delete_options	the options for deleting a child data provider

Exceptions

DELETE-CHILD-PROVIDER-ERROR error dropping the child data provider

Since: DataProvider 2.0

◆ getChildProviderImpl()

*AbstractDataProvider DbDataProvider::DbDataProvider::getChildProviderImpl ( string name )

private

Returns the given child provider or NOTHING if the given child is unknown.

Returns: the given child provider or NOTHING if the given child is unknown

Exceptions

CHILD-PROVIDER-ERROR error acquiring child provider

See also: getChildProviderEx()

◆ getChildProviderNamesImpl()

*list< string > DbDataProvider::DbDataProvider::getChildProviderNamesImpl ( )

private

Returns a list of child data provider names, if any.

Returns: a list of child data provider names, if any

◆ getMapperRuntimeKeys()

*hash< string, hash< MapperRuntimeKeyInfo > > DbDataProvider::DbDataProvider::getMapperRuntimeKeys ( )

Returns custom data mapper runtime keys.

Returns: custom data mapper runtime keys

◆ getRecordTypeFromDescribeHash()

static *hash< string, AbstractDataField > DbDataProvider::DbDataProvider::getRecordTypeFromDescribeHash ( hash< auto > describe_hash )

static

Returns the record type description from a describe hash.

Parameters

describe_hash a hash as returned by AbstractSQLStatement::describe()

Returns: the record type of the query results

◆ getRecordTypeImpl()

*hash< string, AbstractDataField > DbDataProvider::DbDataProvider::getRecordTypeImpl ( *hash< auto > search_options )

private

Returns the description of the record type, if any.

Parameters

search_options to be included and processed by validateSearchOptions() if recordRequiresSearchOptions() is True for this provider, otherwise any value provided in this argument is ignored

◆ makeTableDesc()

hash< auto > DbDataProvider::DbDataProvider::makeTableDesc	(	string	name,
		hash< string, AbstractDataField >	fields,
		*hash< auto >	opts
	)

Returns a table description hash from a field description.

Exceptions

TABLE-DESC-ERROR error in table description

◆ rollback()

DbDataProvider::DbDataProvider::rollback ( )

Rolls back any transaction in progress in the datasource.

See also

:

◆ searchRecordsBulkImpl()

private AbstractDataProviderBulkRecordInterface DbDataProvider::DbDataProvider::searchRecordsBulkImpl	(	int	block_size = `1000`,
		*hash< auto >	where_cond,
		*hash< auto >	search_options
	)

inline

Returns an iterator for zero or more records matching the search options.

Parameters

block_size	the number of records in a read block; must be a positive number
where_cond	the search criteria after processing by processFieldValues()
search_options	the search options after processing by validateSearchOptions()

Exceptions

INVALID-BLOCK-SIZE	the block size must be a positive number
INVALID-OPERATION	the data provider does not support reading

◆ searchRecordsImpl()

AbstractDataProviderRecordIterator DbDataProvider::DbDataProvider::searchRecordsImpl	(	*hash< auto >	where_cond,
		*hash< auto >	search_options
	)

private

Returns an iterator for zero or more records matching the search options.

Parameters

where_cond	the search criteria
search_options	the search options after processing by validateSearchOptions()

See also: requestSearchRecordsImpl()

Member Data Documentation

◆ MapperKeyInfo

const DbDataProvider::DbDataProvider::MapperKeyInfo

Initial value:

= Mapper::MapperKeyInfo + {
            "sequence": <MapperRuntimeKeyInfo>{
                "desc": "names the DB sequence that will be used to populate the field",
                "value_type": "string",
                "unique_roles": "*",
                "returns_type": "int",
            },
            "sequence_currval": <MapperRuntimeKeyInfo>{
                "desc": "names the DB sequence that will be used to populate the field; the current value of the "
                    "sequence is used; will not increment the sequence",
                "value_type": "string",
                "unique_roles": "*",
                "returns_type": "int",
            },
        }

Mapper runtime key info; see details below.

The DbDataProvider class supports the following create option:

sequence: names the DB sequence that will be used to populate the field
sequence_currval: names the DB sequence that will be used to populate the field; the current value of the sequence is used; will not increment the sequence

Public Member Methods

Static Public Member Methods

Public Attributes

Private Member Methods

Private Attributes

Static Private Attributes

Detailed Description

Member Function Documentation

◆ beginTransaction()

◆ commit()

◆ createChildProviderImpl()

◆ deleteChildProviderImpl()

◆ getChildProviderImpl()

◆ getChildProviderNamesImpl()

◆ getMapperRuntimeKeys()

◆ getRecordTypeFromDescribeHash()

◆ getRecordTypeImpl()

◆ makeTableDesc()

◆ rollback()

◆ searchRecordsBulkImpl()

◆ searchRecordsImpl()

Member Data Documentation

◆ MapperKeyInfo