DatabaseQueryDataSourceBuilder Class

Summary: Provides the ability to configure a query to database to to extract geospatial information.

Module: aspose.gis.formats.database

Full Name: aspose.gis.formats.database.DatabaseQueryDataSourceBuilder

Aspose.PSD Version: 25.9.0

Methods

Name	Description
add_attribute(name, type)	Configures the name of the field that will contain information for the feature attribute.
as_trackable_for_changes(table_name, identity_attribute, overwrite_same_key, db_func)	Configure the resulting layer to track changes and create a data source to synchronize the changes made.
build()	The method retrieves an implementation of the IDatabaseDataSource
geometry_field(name)	Configures the name of the field from which the geometry will be extracted.
srid_field(name)	Configuring the name of the query field that will contain the spatial reference system identifier (srid).
use_external_srs_from_query(srs_query)	Allows you to configure the data source to use third-party spatial reference system data, bypassing the pre-installed data in the Aspose.GIS library.

Method: add_attribute(name, type)

 add_attribute(name, type) 

Configures the name of the field that will contain information for the feature attribute.

Parameters:

Parameter	Type	Description
name	string	Name of query field for attribute.
type	AttributeDataType	Type of data into which data from the database should be converted.

Returns

Type	Description
DatabaseQueryDataSourceBuilder	DatabaseQueryDataSourceBuilder

Method: as_trackable_for_changes(table_name, identity_attribute, overwrite_same_key, db_func)

 as_trackable_for_changes(table_name, identity_attribute, overwrite_same_key, db_func) 

Configure the resulting layer to track changes and create a data source to synchronize the changes made.

Parameters:

Parameter	Type	Description
table_name	string	The name of the table where the changes will be made.
identity_attribute	string	An attribute of a feature that will be treated as uniquely identifying the feature.
overwrite_same_key	bool	If this flag is set to true, then newly added features with a unique identifier the same that is already present in the layer, the current one will be overwritten, and the data will be read as updated if differences are found.
db_func	string	Function that will be supplied in SQL query to transform binary data into geographic data representation of the current database.

Returns

Type	Description
DatabaseEditableDataSourceBuilder	DatabaseEditableDataSourceBuilder

Method: build()

 build() 

The method retrieves an implementation of the IDatabaseDataSource

Returns

Type	Description
IDatabaseDataSource	Implementation of the IDatabaseDataSource

Method: geometry_field(name)

 geometry_field(name) 

Configures the name of the field from which the geometry will be extracted.

Parameters:

Parameter	Type	Description
name	string	Name of gemetry field.

Returns

Type	Description
DatabaseQueryDataSourceBuilder	DatabaseQueryDataSourceBuilder

Method: srid_field(name)

 srid_field(name) 

Configuring the name of the query field that will contain the spatial reference system identifier (srid).

Parameters:

Parameter	Type	Description
name	string	Name of the query field containing the spatial reference system identifier.

Returns

Type	Description
DatabaseQueryDataSourceBuilder	DatabaseQueryDataSourceBuilder

Method: use_external_srs_from_query(srs_query)

 use_external_srs_from_query(srs_query) 

Allows you to configure the data source to use third-party spatial reference system data, bypassing the pre-installed data in the Aspose.GIS library.

Parameters:

Parameter	Type	Description
srs_query	string	Query to retrieve information about additional spatial coordinate systems used in the main query to retrieve features.

Returns

Type	Description
DatabaseExternalSrsSettingsBuilder	DatabaseExternalSrsSettingsBuilder