src/headers/spatialite.h File Reference

Main SpatiaLite header file. More...

#include <spatialite/gaiageo.h>

Include dependency graph for spatialite.h:

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Defines
#define	SPLITE_AXIS_1   0x51
#define	SPLITE_AXIS_2   0x52
#define	SPLITE_AXIS_NAME   0x3e
#define	SPLITE_AXIS_ORIENTATION   0x3f
Functions
SPATIALITE_DECLARE void	spatialite_initialize (void)
	Initializes the library.
SPATIALITE_DECLARE void	spatialite_shutdown (void)
	Finalizes the library.
SPATIALITE_DECLARE const char *	spatialite_version (void)
	Return the current library version.
SPATIALITE_DECLARE const char *	spatialite_target_cpu (void)
	Return the target CPU name.
SPATIALITE_DECLARE void *	spatialite_alloc_connection (void)
	Initializes the internal memory block supporting each connection.
SPATIALITE_DECLARE void	spatialite_init (int verbose)
	Initializes a SpatiaLite connection.
SPATIALITE_DECLARE void	spatialite_init_ex (sqlite3 *db_handle, const void *ptr, int verbose)
	Initializes a SpatiaLite connection.
SPATIALITE_DECLARE void	spatialite_init_geos (void)
	Initializes the GEOS library.
SPATIALITE_DECLARE void	spatialite_cleanup (void)
	Cleanup a SpatiaLite connection.
SPATIALITE_DECLARE void	spatialite_cleanup_ex (const void *ptr)
	Cleanup a SpatiaLite connection.
SPATIALITE_DECLARE int	dump_shapefile (sqlite3 *sqlite, char *table, char *column, char *shp_path, char *charset, char *geom_type, int verbose, int *rows, char *err_msg)
	Dumps a full geometry-table into an external Shapefile.
SPATIALITE_DECLARE int	load_shapefile (sqlite3 *sqlite, char *shp_path, char *table, char *charset, int srid, char *column, int coerce2d, int compressed, int verbose, int spatial_index, int *rows, char *err_msg)
	Loads an external Shapefile into a newly created table.
SPATIALITE_DECLARE int	load_shapefile_ex (sqlite3 *sqlite, char *shp_path, char *table, char *charset, int srid, char *geo_column, char *gtype, char *pk_column, int coerce2d, int compressed, int verbose, int spatial_index, int *rows, char *err_msg)
	Loads an external Shapefile into a newly created table.
SPATIALITE_DECLARE int	load_shapefile_ex2 (sqlite3 *sqlite, char *shp_path, char *table, char *charset, int srid, char *geo_column, char *gtype, char *pk_column, int coerce2d, int compressed, int verbose, int spatial_index, int text_date, int *rows, char *err_msg)
	Loads an external Shapefile into a newly created table.
SPATIALITE_DECLARE int	load_dbf (sqlite3 *sqlite, char *dbf_path, char *table, char *charset, int verbose, int *rows, char *err_msg)
	Loads an external DBF file into a newly created table.
SPATIALITE_DECLARE int	load_dbf_ex (sqlite3 *sqlite, char *dbf_path, char *table, char *pk_column, char *charset, int verbose, int *rows, char *err_msg)
	Loads an external DBF file into a newly created table.
SPATIALITE_DECLARE int	load_dbf_ex2 (sqlite3 *sqlite, char *dbf_path, char *table, char *pk_column, char *charset, int verbose, int text_date, int *rows, char *err_msg)
	Loads an external DBF file into a newly created table.
SPATIALITE_DECLARE int	dump_dbf (sqlite3 *sqlite, char *table, char *dbf_path, char *charset, char *err_msg)
	Dumps a full table into an external DBF file.
SPATIALITE_DECLARE int	dump_dbf_ex (sqlite3 *sqlite, char *table, char *dbf_path, char *charset, int *rows, char *err_msg)
	Dumps a full table into an external DBF file.
SPATIALITE_DECLARE int	load_XL (sqlite3 *sqlite, const char *path, const char *table, unsigned int worksheetIndex, int first_titles, unsigned int *rows, char *err_msg)
	Loads an external spreadsheet (.xls) file into a newly created table.
SPATIALITE_DECLARE double	math_round (double value)
	A portable replacement for C99 round()
SPATIALITE_DECLARE sqlite3_int64	math_llabs (sqlite3_int64 value)
	A portable replacement for C99 llabs()
SPATIALITE_DECLARE int	spatial_ref_sys_init (sqlite3 *sqlite, int verbose)
	Inserts the inlined EPSG dataset into the "spatial_ref_sys" table.
SPATIALITE_DECLARE int	spatial_ref_sys_init2 (sqlite3 *sqlite, int mode, int verbose)
	Inserts the inlined EPSG dataset into the "spatial_ref_sys" table.
SPATIALITE_DECLARE int	insert_epsg_srid (sqlite3 *sqlite, int srid)
	Inserts some inlined EPSG definition into the "spatial_ref_sys" table.
SPATIALITE_DECLARE int	srid_is_geographic (sqlite3 *sqlite, int srid, int *geographic)
	checks a SRID definition from the "spatial_ref_sys" table determining if it is of the geographic type
SPATIALITE_DECLARE int	srid_is_projected (sqlite3 *sqlite, int srid, int *projected)
	checks a SRID definition from the "spatial_ref_sys" table determining if it is of the projected type
SPATIALITE_DECLARE int	srid_has_flipped_axes (sqlite3 *sqlite, int srid, int *flipped)
	checks a SRID definition from the "spatial_ref_sys" table determining if the axes order is X-Y or Y-X
SPATIALITE_DECLARE char *	srid_get_spheroid (sqlite3 *sqlite, int srid)
	checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Spheroid name
SPATIALITE_DECLARE char *	srid_get_prime_meridian (sqlite3 *sqlite, int srid)
	checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Prime Meridian name
SPATIALITE_DECLARE char *	srid_get_projection (sqlite3 *sqlite, int srid)
	checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Projection name
SPATIALITE_DECLARE char *	srid_get_datum (sqlite3 *sqlite, int srid)
	checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Datum name
SPATIALITE_DECLARE char *	srid_get_unit (sqlite3 *sqlite, int srid)
	checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Unit name
SPATIALITE_DECLARE char *	srid_get_axis (sqlite3 *sqlite, int srid, char axis, char mode)
	checks a SRID definition from the "spatial_ref_sys" table then returning an Axis definition
SPATIALITE_DECLARE int	is_kml_constant (sqlite3 *sqlite, char *table, char *column)
	Checks if a column is actually defined into the given table.
SPATIALITE_DECLARE int	dump_kml (sqlite3 *sqlite, char *table, char *geom_col, char *kml_path, char *name_col, char *desc_col, int precision)
	Dumps a full geometry-table into an external KML file.
SPATIALITE_DECLARE int	dump_kml_ex (sqlite3 *sqlite, char *table, char *geom_col, char *kml_path, char *name_col, char *desc_col, int precision, int *rows)
	Dumps a full geometry-table into an external KML file.
SPATIALITE_DECLARE void	check_duplicated_rows (sqlite3 *sqlite, char *table, int *dupl_count)
	Checks for duplicated rows into the same table.
SPATIALITE_DECLARE void	remove_duplicated_rows (sqlite3 *sqlite, char *table)
	Remove duplicated rows from a table.
SPATIALITE_DECLARE void	remove_duplicated_rows_ex (sqlite3 *sqlite, char *table, int *removed)
	Remove duplicated rows from a table.
SPATIALITE_DECLARE void	remove_duplicated_rows_ex2 (sqlite3 *sqlite, char *table, int *removed, int transaction)
	Remove duplicated rows from a table.
SPATIALITE_DECLARE void	elementary_geometries (sqlite3 *sqlite, char *inTable, char *geometry, char *outTable, char *pKey, char *multiId)
	Creates a derived table surely containing elementary Geometries.
SPATIALITE_DECLARE void	elementary_geometries_ex (sqlite3 *sqlite, char *inTable, char *geometry, char *outTable, char *pKey, char *multiId, int *rows)
	Creates a derived table surely containing elementary Geometries.
SPATIALITE_DECLARE void	elementary_geometries_ex2 (sqlite3 *sqlite, char *inTable, char *geometry, char *outTable, char *pKey, char *multiId, int *rows, int transaction)
	Creates a derived table surely containing elementary Geometries.
SPATIALITE_DECLARE int	dump_geojson (sqlite3 *sqlite, char *table, char *geom_col, char *outfile_path, int precision, int option)
	Dumps a full geometry-table into an external GeoJSON file.
SPATIALITE_DECLARE int	dump_geojson_ex (sqlite3 *sqlite, char *table, char *geom_col, char *outfile_path, int precision, int option, int *rows)
	Dumps a full geometry-table into an external GeoJSON file.
SPATIALITE_DECLARE int	update_layer_statistics (sqlite3 *sqlite, const char *table, const char *column)
	Updates the LAYER_STATICS metadata table.
SPATIALITE_DECLARE int	gaiaStatisticsInvalidate (sqlite3 *handle, const char *table, const char *geometry)
	Immediately and unconditionally invalidates the already existing Statistics.
SPATIALITE_DECLARE gaiaGeomCollPtr	gaiaGetLayerExtent (sqlite3 *handle, const char *table, const char *geometry, int mode)
	Queries the Metadata tables returning the Layer Full Extent.
SPATIALITE_DECLARE gaiaVectorLayersListPtr	gaiaGetVectorLayersList (sqlite3 *handle, const char *table, const char *geometry, int mode)
	Queries the Metadata tables supporting Vector Layers.
SPATIALITE_DECLARE int	gaiaCreateMetaCatalogTables (sqlite3 *handle)
	Creates (or re-creates) the "splite_metacatalog" and "splite_metacalog_statistics" tables.
SPATIALITE_DECLARE int	gaiaUpdateMetaCatalogStatistics (sqlite3 *handle, const char *table, const char *column)
	Updates the "splite_metacatalog_statistics" table.
SPATIALITE_DECLARE int	gaiaUpdateMetaCatalogStatisticsFromMaster (sqlite3 *handle, const char *master_table, const char *table_name, const char *column_name)
	Updates the "splite_metacatalog_statistics" table (using a Master Table).
SPATIALITE_DECLARE void	gaiaFreeVectorLayersList (gaiaVectorLayersListPtr ptr)
	Destroys a VectorLayersList object.
SPATIALITE_DECLARE int	gaiaDropTable (sqlite3 *sqlite, const char *table)
	Drops a layer-table, removing any related dependency.
SPATIALITE_DECLARE int	gaiaDropTableEx (sqlite3 *sqlite, const char *prefix, const char *table)
	Drops a layer-table, removing any related dependency.
SPATIALITE_DECLARE int	gaiaDropTableEx2 (sqlite3 *sqlite, const char *prefix, const char *table, int transaction)
	Drops a layer-table, removing any related dependency.
SPATIALITE_DECLARE int	check_geometry_column (sqlite3 *sqlite, const char *table, const char *geom, const char *report_path, int *n_rows, int *n_invalids, char **err_msg)
	Checks a Geometry Column for validity.
SPATIALITE_DECLARE int	check_geometry_column_r (const void *p_cache, sqlite3 *sqlite, const char *table, const char *geom, const char *report_path, int *n_rows, int *n_invalids, char **err_msg)
	Checks a Geometry Column for validity.
SPATIALITE_DECLARE int	check_all_geometry_columns (sqlite3 *sqlite, const char *output_dir, int *n_invalids, char **err_msg)
	Checks all Geometry Columns for validity.
SPATIALITE_DECLARE int	check_all_geometry_columns_r (const void *p_cache, sqlite3 *sqlite, const char *output_dir, int *n_invalids, char **err_msg)
	Checks all Geometry Columns for validity.
SPATIALITE_DECLARE int	sanitize_geometry_column (sqlite3 *sqlite, const char *table, const char *geom, const char *tmp_table, const char *report_path, int *n_invalids, int *n_repaired, int *n_discarded, int *n_failures, char **err_msg)
	Sanitizes a Geometry Column making all invalid geometries to be valid.
SPATIALITE_DECLARE int	sanitize_geometry_column_r (const void *p_cache, sqlite3 *sqlite, const char *table, const char *geom, const char *tmp_table, const char *report_path, int *n_invalids, int *n_repaired, int *n_discarded, int *n_failures, char **err_msg)
	Sanitizes a Geometry Column making all invalid geometries to be valid.
SPATIALITE_DECLARE int	sanitize_all_geometry_columns (sqlite3 *sqlite, const char *tmp_prefix, const char *output_dir, int *not_repaired, char **err_msg)
	Sanitizes all Geometry Columns making all invalid geometries to be valid.
SPATIALITE_DECLARE int	sanitize_all_geometry_columns_r (const void *p_cache, sqlite3 *sqlite, const char *tmp_prefix, const char *output_dir, int *not_repaired, char **err_msg)
	Sanitizes all Geometry Columns making all invalid geometries to be valid.
SPATIALITE_DECLARE int	gaiaGPKG2Spatialite (sqlite3 *handle_in, const char *gpkg_in_path, sqlite3 *handle_out, const char *splite_out_path)
SPATIALITE_DECLARE int	gaiaSpatialite2GPKG (sqlite3 *handle_in, const char *splite_in_path, sqlite3 *handle_out, const char *gpkg_out_path)

---

Detailed Description

Main SpatiaLite header file.

---

Function Documentation

SPATIALITE_DECLARE int check_all_geometry_columns	(	sqlite3 *	sqlite,
		const char *	output_dir,
		int *	n_invalids,
		char **	err_msg
	)

Checks all Geometry Columns for validity.

Parameters:

sqlite	handle to current DB connection
output_dir	pathname of the directory to be created for report-files
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

check_all_geometry_columns_r, check_geometry_column, sanitize_geometry_column, sanitize_all_geometry_columns

Note:

this function will check all Geometry Columns (vector layers) for validity; a HTML report will be produced.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
not reentrant and thread unsafe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int check_all_geometry_columns_r	(	const void *	p_cache,
		sqlite3 *	sqlite,
		const char *	output_dir,
		int *	n_invalids,
		char **	err_msg
	)

Checks all Geometry Columns for validity.

Parameters:

p_cache	a memory pointer returned by spatialite_alloc_connection()
sqlite	handle to current DB connection
output_dir	pathname of the directory to be created for report-files
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

check_all_geometry_columns, check_geometry_column, sanitize_geometry_column, sanitize_all_geometry_columns

Note:

this function will check all Geometry Columns (vector layers) for validity; a HTML report will be produced.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
reentrant and thread-safe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE void check_duplicated_rows	(	sqlite3 *	sqlite,
		char *	table,
		int *	dupl_count
	)

Checks for duplicated rows into the same table.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be checked
dupl_count	on completion will contain the number of duplicated rows found

See also:

remove_duplicated_rows

Note:

two (or more) rows are assumed to be duplicated if any column

value (excluding any Primary Key column) is exacly the same

SPATIALITE_DECLARE int check_geometry_column	(	sqlite3 *	sqlite,
		const char *	table,
		const char *	geom,
		const char *	report_path,
		int *	n_rows,
		int *	n_invalids,
		char **	err_msg
	)

Checks a Geometry Column for validity.

Parameters:

sqlite	handle to current DB connection
table	name of the table
geometry	name of the column to be checked
report_path	pathname of the report-file
n_rows	if this variable is not NULL on successful completion will contain the total number of rows found into the checkeck table
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found into the checkeck table
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

check_geometry_column_r, check_all_geometry_columns, sanitize_geometry_column, sanitize_all_geometry_columns

Note:

this function will check a Geometry Column (layer) for validity; a HTML report will be produced.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
not reentrant and thread unsafe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int check_geometry_column_r	(	const void *	p_cache,
		sqlite3 *	sqlite,
		const char *	table,
		const char *	geom,
		const char *	report_path,
		int *	n_rows,
		int *	n_invalids,
		char **	err_msg
	)

Checks a Geometry Column for validity.

Parameters:

p_cache	a memory pointer returned by spatialite_alloc_connection()
sqlite	handle to current DB connection
table	name of the table
geometry	name of the column to be checked
report_path	pathname of the report-file
n_rows	if this variable is not NULL on successful completion will contain the total number of rows found into the checkeck table
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found into the checkeck table
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

check_geometry_column, check_all_geometry_columns, sanitize_geometry_column, sanitize_all_geometry_columns

Note:

this function will check a Geometry Column (layer) for validity; a HTML report will be produced.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
reentrant and thread-safe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_dbf	(	sqlite3 *	sqlite,
		char *	table,
		char *	dbf_path,
		char *	charset,
		char *	err_msg
	)

Dumps a full table into an external DBF file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
dbf_path	pathname of the DBF to be exported
charset	a valid GNU ICONV charset to be used for DBF text strings
err_msg	on completion will contain an error message (if any)

See also:

dump_dbf_ex

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_dbf_ex	(	sqlite3 *	sqlite,
		char *	table,
		char *	dbf_path,
		char *	charset,
		int *	rows,
		char *	err_msg
	)

Dumps a full table into an external DBF file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
dbf_path	pathname of the DBF to be exported
charset	a valid GNU ICONV charset to be used for DBF text strings
rows	on completion will contain the total number of exported rows
err_msg	on completion will contain an error message (if any)

See also:

dump_dbf

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_geojson	(	sqlite3 *	sqlite,
		char *	table,
		char *	geom_col,
		char *	outfile_path,
		int	precision,
		int	option
	)

Dumps a full geometry-table into an external GeoJSON file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
geom_col	the name of the geometry column
outfile_path	pathname for the GeoJSON file to be written to
precision	number of decimal digits for coordinates
option	the format to use for output

See also:

dump_geojson_rx

Note:

valid values for option are:

• 0 no option
• 1 GeoJSON MBR
• 2 GeoJSON Short CRS (e.g EPSG:4326)
• 3 MBR + Short CRS
• 4 GeoJSON Long CRS (e.g urn:ogc:def:crs:EPSG::4326)
• 5 MBR + Long CRS

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_geojson_ex	(	sqlite3 *	sqlite,
		char *	table,
		char *	geom_col,
		char *	outfile_path,
		int	precision,
		int	option,
		int *	rows
	)

Dumps a full geometry-table into an external GeoJSON file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
geom_col	the name of the geometry column
outfile_path	pathname for the GeoJSON file to be written to
precision	number of decimal digits for coordinates
option	the format to use for output
rows	on completion will contain the total number of exported rows

See also:

dump_geojson

Note:

valid values for option are:

• 0 no option
• 1 GeoJSON MBR
• 2 GeoJSON Short CRS (e.g EPSG:4326)
• 3 MBR + Short CRS
• 4 GeoJSON Long CRS (e.g urn:ogc:def:crs:EPSG::4326)
• 5 MBR + Long CRS

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_kml	(	sqlite3 *	sqlite,
		char *	table,
		char *	geom_col,
		char *	kml_path,
		char *	name_col,
		char *	desc_col,
		int	precision
	)

Dumps a full geometry-table into an external KML file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
geom_col	the name of the geometry column
kml_path	pathname of the KML file to be exported
name_col	column to be used for KML "name" (may be null)
desc_col	column to be used for KML "description" (may be null)
precision	number of decimal digits for coordinates

See also:

dump_kml_ex

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_kml_ex	(	sqlite3 *	sqlite,
		char *	table,
		char *	geom_col,
		char *	kml_path,
		char *	name_col,
		char *	desc_col,
		int	precision,
		int *	rows
	)

Dumps a full geometry-table into an external KML file.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
geom_col	the name of the geometry column
kml_path	pathname of the KML file to be exported
name_col	column to be used for KML "name" (may be null)
desc_col	column to be used for KML "description" (may be null)
precision	number of decimal digits for coordinates
rows	on completion will contain the total number of exported rows

See also:

dump_kml

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int dump_shapefile	(	sqlite3 *	sqlite,
		char *	table,
		char *	column,
		char *	shp_path,
		char *	charset,
		char *	geom_type,
		int	verbose,
		int *	rows,
		char *	err_msg
	)

Dumps a full geometry-table into an external Shapefile.

Parameters:

sqlite	handle to current DB connection
table	the name of the table to be exported
column	the name of the geometry column
shp_path	pathname of the Shapefile to be exported (no suffix)
charset	a valid GNU ICONV charset to be used for DBF text strings
geom_type	"POINT", "LINESTRING", "POLYGON", "MULTIPOLYGON" or NULL
verbose	if TRUE a short report is shown on stderr
rows	on completion will contain the total number of exported rows
err_msg	on completion will contain an error message (if any)

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE void elementary_geometries	(	sqlite3 *	sqlite,
		char *	inTable,
		char *	geometry,
		char *	outTable,
		char *	pKey,
		char *	multiId
	)

Creates a derived table surely containing elementary Geometries.

Parameters:

sqlite	handle to current DB connection
inTable	name of the input table
geometry	name of the Geometry column
outTable	name of the output table to be created
pKey	name of the Primary Key column in the output table
multiId	name of the column identifying origins in the output table

See also:

elementary_geometries_ex

Note:

if the input table contains some kind of complex Geometry (MULTIPOINT, MULTILINESTRING, MULTIPOLYGON or GEOMETRYCOLLECTION), then many rows are inserted into the output table: each single row will contain the same attributes and an elementaty Geometry. All the rows created by expanding the same input row will expose the same value in the "multiId" column.

SPATIALITE_DECLARE void elementary_geometries_ex	(	sqlite3 *	sqlite,
		char *	inTable,
		char *	geometry,
		char *	outTable,
		char *	pKey,
		char *	multiId,
		int *	rows
	)

Creates a derived table surely containing elementary Geometries.

Parameters:

sqlite	handle to current DB connection
inTable	name of the input table
geometry	name of the Geometry column
outTable	name of the output table to be created
pKey	name of the Primary Key column in the output table
multiId	name of the column identifying origins in the output table
rows	on completion will contain the total number of inserted rows

See also:

elementary_geometries_ex2

Note:

if the input table contains some kind of complex Geometry (MULTIPOINT, MULTILINESTRING, MULTIPOLYGON or GEOMETRYCOLLECTION), then many rows are inserted into the output table: each single row will contain the same attributes and an elementaty Geometry. All the rows created by expanding the same input row will expose the same value in the "multiId" column.

SPATIALITE_DECLARE void elementary_geometries_ex2	(	sqlite3 *	sqlite,
		char *	inTable,
		char *	geometry,
		char *	outTable,
		char *	pKey,
		char *	multiId,
		int *	rows,
		int	transaction
	)

Creates a derived table surely containing elementary Geometries.

Parameters:

sqlite	handle to current DB connection
inTable	name of the input table
geometry	name of the Geometry column
outTable	name of the output table to be created
pKey	name of the Primary Key column in the output table
multiId	name of the column identifying origins in the output table
rows	on completion will contain the total number of inserted rows
transaction	boolena; if set to TRUE will internally handle a SQL Transaction

See also:

elementary_geometries

Note:

if the input table contains some kind of complex Geometry (MULTIPOINT, MULTILINESTRING, MULTIPOLYGON or GEOMETRYCOLLECTION), then many rows are inserted into the output table: each single row will contain the same attributes and an elementaty Geometry. All the rows created by expanding the same input row will expose the same value in the "multiId" column.

SPATIALITE_DECLARE int gaiaCreateMetaCatalogTables

(

sqlite3 *

handle

)

Creates (or re-creates) the "splite_metacatalog" and "splite_metacalog_statistics" tables.

Parameters:

handle

SQLite handle to current DB connection.

Returns:

0 (FALSE) on failure, any other value (TRUE) on success

See also:

gaiaUpdateMetaCatalogStatistics, gaiaUpdateMetaCatalogStatisticsFromMaster

SPATIALITE_DECLARE int gaiaDropTable	(	sqlite3 *	sqlite,
		const char *	table
	)

Drops a layer-table, removing any related dependency.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be removed

Note:

this function will drop a SpatialTable, SpatialView or VirtualShape being properly registered within the Metadata tables.
an eventual Spatial Index will be dropped as well, and any row referring the selected table will be removed from the Metadata tables.

Returns:

0 on failure, any other value on success

See also:

gaiaDropTableEx

Note:

this one simply is a convenience method alway defaulting to gaiaDropTableEx(sqlite, "main", table);

SPATIALITE_DECLARE int gaiaDropTableEx	(	sqlite3 *	sqlite,
		const char *	prefix,
		const char *	table
	)

Drops a layer-table, removing any related dependency.

Parameters:

sqlite	handle to current DB connection
prefix	schema prefix identifying the target DB "main" always identifies the main DB (primary, not Attached).
table	name of the table to be removed

Note:

this function will drop a SpatialTable, SpatialView or VirtualShape being properly registered within the Metadata tables.
an eventual Spatial Index will be dropped as well, and any row referring the selected table will be removed from the Metadata tables.

Returns:

0 on failure, any other value on success

See also:

gaiaDropTableEx2

SPATIALITE_DECLARE int gaiaDropTableEx2	(	sqlite3 *	sqlite,
		const char *	prefix,
		const char *	table,
		int	transaction
	)

Drops a layer-table, removing any related dependency.

Parameters:

sqlite	handle to current DB connection
prefix	schema prefix identifying the target DB "main" always identifies the main DB (primary, not Attached).
table	name of the table to be removed
transaction	boolena; if set to TRUE will internally handle a SQL Transaction

Note:

this function will drop a SpatialTable, SpatialView or VirtualShape being properly registered within the Metadata tables.
an eventual Spatial Index will be dropped as well, and any row referring the selected table will be removed from the Metadata tables.

Returns:

0 on failure, any other value on success

See also:

gaiaDropTable

SPATIALITE_DECLARE void gaiaFreeVectorLayersList

(

gaiaVectorLayersListPtr

ptr

)

Destroys a VectorLayersList object.

Parameters:

ptr	pointer to the VectorLayersList object to be destroyed

See also:

gaiaGetVectorLayersList

Examples:

demo5.c.

SPATIALITE_DECLARE gaiaGeomCollPtr gaiaGetLayerExtent	(	sqlite3 *	handle,
		const char *	table,
		const char *	geometry,
		int	mode
	)

Queries the Metadata tables returning the Layer Full Extent.

Parameters:

handle	SQLite handle to current DB connection.
table	VectorLayer Table (or View, or VirtualShape).
geometry	Geometry Column name.
mode	if TRUE a PESSIMISTIC statistics update will be implied, otherwise OPTIMISTIC.

Returns:

the pointer to the newly created Geometry (Envelope): NULL on failure

See also:

update_layer_statistic, gaiaStatisticsInvalidate, gaiaGetVectorLayersList

Note:

you are responsible to destroy (before or after) any allocated Geometry returned by gaiaGetLayerExtent().
The geometry arg is optional when the table simply has a single Geometry Column, and can be NULL in this case.
When the mode arg is set to FALSE (default) then the returned infos will be simply retrieved from the staticized statistic tables (faster, but could be inaccurate).
If the mode arg is set to TRUE a preliminary attempt to update the statistic tables will be always performed (probably slower, but surely accurate).
If the named Layer doesn't exist, or if it's completely empty (not containing any valid Geometry) NULL will be returned.

SPATIALITE_DECLARE gaiaVectorLayersListPtr gaiaGetVectorLayersList	(	sqlite3 *	handle,
		const char *	table,
		const char *	geometry,
		int	mode
	)

Queries the Metadata tables supporting Vector Layers.

Parameters:

handle	SQLite handle to current DB connection.
table	VectorLayer Table (or View, or VirtualShape).
geometry	Geometry Column name.
mode	one of GAIA_VECTORS_LIST_OPTIMISTIC or GAIA_VECTORS_LIST_PESSIMISTIC.

Returns:

the pointer to the newly created VectorLayersList object: NULL on failure

See also:

gaiaFreeVectorLayersList, update_layer_statistics, gaiaStatisticsInvalidate, gaiaGetLayerExtent, gaiaGetVectorLayersList

Note:

you are responsible to destroy (before or after) any allocated VectorLayersList returned by gaiaGetVectorLayersList().
If the table arg is NULL all VectorLayers defined within the DB will be reported; otherwise only a single Layer will be reported (if existing).
By defining the geometry arg (not NULL) you can further restrict the returned report.
When the mode arg is set to GAIA_VECTORS_LIST_OPTIMISTIC (default) then the returned infos will be simply retrieved from the staticized statistic tables (faster, but could be inaccurate).
If the mode arg is set to GAIA_VECTORS_LIST_PESSIMISTIC a preliminary attempt to update the statistic tables will be always performed (probably slower, but surely accurate).

Examples:

demo5.c.

SPATIALITE_DECLARE int gaiaStatisticsInvalidate	(	sqlite3 *	handle,
		const char *	table,
		const char *	geometry
	)

Immediately and unconditionally invalidates the already existing Statistics.

Parameters:

handle	SQLite handle to current DB connection.
table	VectorLayer Table (or View, or VirtualShape).
geometry	Geometry Column name.

Returns:

0 on success, any other value on success

See also:

update_layer_statistics, gaiaGetLayerExtent, gaiaGetVectorLayersList

Note:

if the table arg is NULL all Statistics for any VectorLayer defined within the DB will be invalidated; otherwise only a single Layer will be affectedd (if existing).
By defining the geometry arg (not NULL) you can further restrict your selection.

SPATIALITE_DECLARE int gaiaUpdateMetaCatalogStatistics	(	sqlite3 *	handle,
		const char *	table,
		const char *	column
	)

Updates the "splite_metacatalog_statistics" table.

Parameters:

handle	SQLite handle to current DB connection.
table	name of the table to be processed.
column	name of the column to be processed.

Returns:

0 (FALSE) on failure, any other value (TRUE) on success

See also:

gaiaCreateMetaCatalogTables, gaiaUpdateMetaCatalogStatisticsFromMaster

SPATIALITE_DECLARE int gaiaUpdateMetaCatalogStatisticsFromMaster	(	sqlite3 *	handle,
		const char *	master_table,
		const char *	table_name,
		const char *	column_name
	)

Updates the "splite_metacatalog_statistics" table (using a Master Table).

Parameters:

handle	SQLite handle to current DB connection.
master_table	name of the master-table controlling the whole process.
table_name	name of the column into the master-table containing table-names.
column_name	name of the column into the master-table containing column-names.

Returns:

0 (FALSE) on failure, any other value (TRUE) on success

See also:

gaiaCreateMetaCatalogTables, gaiaUpdateMetaCatalogStatistics

SPATIALITE_DECLARE int insert_epsg_srid	(	sqlite3 *	sqlite,
		int	srid
	)

Inserts some inlined EPSG definition into the "spatial_ref_sys" table.

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int is_kml_constant	(	sqlite3 *	sqlite,
		char *	table,
		char *	column
	)

Checks if a column is actually defined into the given table.

Parameters:

sqlite	handle to current DB connection
table	the table to be checked
column	the column to be checked

Returns:

0 on success, any other value on success

Note:

internally used to detect if some KML attribute defaults to a constant value

SPATIALITE_DECLARE int load_dbf	(	sqlite3 *	sqlite,
		char *	dbf_path,
		char *	table,
		char *	charset,
		int	verbose,
		int *	rows,
		char *	err_msg
	)

Loads an external DBF file into a newly created table.

Parameters:

sqlite	handle to current DB connection
dbf_path	pathname of the DBF file to be imported
table	the name of the table to be created
charset	a valid GNU ICONV charset to be used for DBF text strings
verbose	if TRUE a short report is shown on stderr
rows	on completion will contain the total number of actually exported rows
err_msg	on completion will contain an error message (if any)

See also:

load_dbf_ex, load_dbf_ex2

Note:

this function simply calls load_dbf_ex by passing an implicit pk_column=NULL argument

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int load_dbf_ex	(	sqlite3 *	sqlite,
		char *	dbf_path,
		char *	table,
		char *	pk_column,
		char *	charset,
		int	verbose,
		int *	rows,
		char *	err_msg
	)

Loads an external DBF file into a newly created table.

Parameters:

sqlite	handle to current DB connection
dbf_path	pathname of the DBF file to be imported
table	the name of the table to be created
pk_column	name of the Primary Key column; if NULL or mismatching then "PK_UID" will be assumed by default.
charset	a valid GNU ICONV charset to be used for DBF text strings
verbose	if TRUE a short report is shown on stderr
rows	on completion will contain the total number of actually exported rows
err_msg	on completion will contain an error message (if any)

See also:

load_dbf, load_dbf_ex2

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int load_dbf_ex2	(	sqlite3 *	sqlite,
		char *	dbf_path,
		char *	table,
		char *	pk_column,
		char *	charset,
		int	verbose,
		int	text_date,
		int *	rows,
		char *	err_msg
	)

Loads an external DBF file into a newly created table.

Parameters:

sqlite	handle to current DB connection
dbf_path	pathname of the DBF file to be imported
table	the name of the table to be created
pk_column	name of the Primary Key column; if NULL or mismatching then "PK_UID" will be assumed by default.
charset	a valid GNU ICONV charset to be used for DBF text strings
verbose	if TRUE a short report is shown on stderr
text_dates	is TRUE all DBF dates will be considered as TEXT
rows	on completion will contain the total number of imported rows
err_msg	on completion will contain an error message (if any)

See also:

load_dbf, load_dbf_ex

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int load_shapefile	(	sqlite3 *	sqlite,
		char *	shp_path,
		char *	table,
		char *	charset,
		int	srid,
		char *	column,
		int	coerce2d,
		int	compressed,
		int	verbose,
		int	spatial_index,
		int *	rows,
		char *	err_msg
	)

Loads an external Shapefile into a newly created table.

Parameters:

sqlite	handle to current DB connection
shp_path	pathname of the Shapefile to be imported (no suffix)
table	the name of the table to be created
charset	a valid GNU ICONV charset to be used for DBF text strings
srid	the SRID to be set for Geometries
column	the name of the geometry column
coerce2d	if TRUE any Geometry will be casted to 2D [XY]
compressed	if TRUE compressed Geometries will be created
verbose	if TRUE a short report is shown on stderr
spatial_index	if TRUE an R*Tree Spatial Index will be created
rows	on completion will contain the total number of imported rows
err_msg	on completion will contain an error message (if any)

Returns:

0 on failure, any other value on success

See also:

load_shapefile_ex, load_shapefile_ex2

Note:

this function simply calls load_shapefile_ex by passing implicit gype="AUTO" and pk_column=NULL arguments

SPATIALITE_DECLARE int load_shapefile_ex	(	sqlite3 *	sqlite,
		char *	shp_path,
		char *	table,
		char *	charset,
		int	srid,
		char *	geo_column,
		char *	gtype,
		char *	pk_column,
		int	coerce2d,
		int	compressed,
		int	verbose,
		int	spatial_index,
		int *	rows,
		char *	err_msg
	)

Loads an external Shapefile into a newly created table.

Parameters:

sqlite	handle to current DB connection
shp_path	pathname of the Shapefile to be imported (no suffix)
table	the name of the table to be created
charset	a valid GNU ICONV charset to be used for DBF text strings
srid	the SRID to be set for Geometries
geo_column	the name of the geometry column
gtype	expected to be one of: "LINESTRING", "LINESTRINGZ", "LINESTRINGM", "LINESTRINGZM", "MULTILINESTRING", "MULTILINESTRINGZ", "MULTILINESTRINGM", "MULTILINESTRINGZM", "POLYGON", "POLYGONZ", "POLYGONM", "POLYGONZM", "MULTIPOLYGON", "MULTIPOLYGONZ", "MULTIPOLYGONM", "MULTIPOLYGONZM" or "AUTO".
pk_column	name of the Primary Key column; if NULL or mismatching then "PK_UID" will be assumed by default.
coerce2d	if TRUE any Geometry will be casted to 2D [XY]
compressed	if TRUE compressed Geometries will be created
verbose	if TRUE a short report is shown on stderr
spatial_index	if TRUE an R*Tree Spatial Index will be created
rows	on completion will contain the total number of imported rows
err_msg	on completion will contain an error message (if any)

Returns:

0 on failure, any other value on success

See also:

load_shapefile, load_shapefile_ex2

Note:

the Shapefile format doesn't supports any distinction between LINESTRINGs and MULTILINESTRINGs, or between POLYGONs and MULTIPOLYGONs; as does not allows to clearly distinguish if the M-measure is required.
So a first preliminary scan of the Shapefile is required in order to correctly identify the actual payload (gtype = "AUTO", default case).
By explicitly specifying some expected geometry type this first scan will be skipped at all thus introducing a noticeable performance gain.
Anyway, declaring a mismatching geometry type will surely cause a failure.

SPATIALITE_DECLARE int load_shapefile_ex2	(	sqlite3 *	sqlite,
		char *	shp_path,
		char *	table,
		char *	charset,
		int	srid,
		char *	geo_column,
		char *	gtype,
		char *	pk_column,
		int	coerce2d,
		int	compressed,
		int	verbose,
		int	spatial_index,
		int	text_date,
		int *	rows,
		char *	err_msg
	)

Loads an external Shapefile into a newly created table.

Parameters:

sqlite	handle to current DB connection
shp_path	pathname of the Shapefile to be imported (no suffix)
table	the name of the table to be created
charset	a valid GNU ICONV charset to be used for DBF text strings
srid	the SRID to be set for Geometries
geo_column	the name of the geometry column
gtype	expected to be one of: "LINESTRING", "LINESTRINGZ", "LINESTRINGM", "LINESTRINGZM", "MULTILINESTRING", "MULTILINESTRINGZ", "MULTILINESTRINGM", "MULTILINESTRINGZM", "POLYGON", "POLYGONZ", "POLYGONM", "POLYGONZM", "MULTIPOLYGON", "MULTIPOLYGONZ", "MULTIPOLYGONM", "MULTIPOLYGONZM" or "AUTO".
pk_column	name of the Primary Key column; if NULL or mismatching then "PK_UID" will be assumed by default.
coerce2d	if TRUE any Geometry will be casted to 2D [XY]
compressed	if TRUE compressed Geometries will be created
verbose	if TRUE a short report is shown on stderr
spatial_index	if TRUE an R*Tree Spatial Index will be created
text_dates	is TRUE all DBF dates will be considered as TEXT
rows	on completion will contain the total number of imported rows
err_msg	on completion will contain an error message (if any)

Returns:

0 on failure, any other value on success

See also:

load_shapefile, load_shapefile_ex

Note:

the Shapefile format doesn't supports any distinction between LINESTRINGs and MULTILINESTRINGs, or between POLYGONs and MULTIPOLYGONs; as does not allows to clearly distinguish if the M-measure is required.
So a first preliminary scan of the Shapefile is required in order to correctly identify the actual payload (gtype = "AUTO", default case).
By explicitly specifying some expected geometry type this first scan will be skipped at all thus introducing a noticeable performance gain.
Anyway, declaring a mismatching geometry type will surely cause a failure.

SPATIALITE_DECLARE int load_XL	(	sqlite3 *	sqlite,
		const char *	path,
		const char *	table,
		unsigned int	worksheetIndex,
		int	first_titles,
		unsigned int *	rows,
		char *	err_msg
	)

Loads an external spreadsheet (.xls) file into a newly created table.

Parameters:

sqlite	handle to current DB connection
path	pathname of the spreadsheet file to be imported
table	the name of the table to be created
worksheetIndex	the index identifying the worksheet to be imported
first_titles	if TRUE the first line is assumed to contain column names
rows	on completion will contain the total number of actually exported rows
err_msg	on completion will contain an error message (if any)

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE sqlite3_int64 math_llabs

(

sqlite3_int64

value

)

A portable replacement for C99 llabs()

Parameters:

value

a 64 bit integer value

Returns:

the corresponding absolute value

SPATIALITE_DECLARE double math_round

(

double

value

)

A portable replacement for C99 round()

Parameters:

value

a double value

Returns:

the nearest integeral value

SPATIALITE_DECLARE void remove_duplicated_rows	(	sqlite3 *	sqlite,
		char *	table
	)

Remove duplicated rows from a table.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be cleaned

See also:

check_duplicated_rows, remove_duplicated_rows_ex

Note:

when two (or more) duplicated rows exist, only the first occurence will be preserved, then deleting any further occurrence.

SPATIALITE_DECLARE void remove_duplicated_rows_ex	(	sqlite3 *	sqlite,
		char *	table,
		int *	removed
	)

Remove duplicated rows from a table.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be cleaned
removed	on successful completion will contain the total count of removed duplicate rows

See also:

check_duplicated_rows, remove_duplicated_rows_ex2

Note:

when two (or more) duplicated rows exist, only the first occurence will be preserved, then deleting any further occurrence.

SPATIALITE_DECLARE void remove_duplicated_rows_ex2	(	sqlite3 *	sqlite,
		char *	table,
		int *	removed,
		int	transaction
	)

Remove duplicated rows from a table.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be cleaned
removed	on successful completion will contain the total count of removed duplicate rows
transaction	boolena; if set to TRUE will internally handle a SQL Transaction

See also:

check_duplicated_rows, remove_duplicated_rows

Note:

when two (or more) duplicated rows exist, only the first occurence will be preserved, then deleting any further occurrence.

SPATIALITE_DECLARE int sanitize_all_geometry_columns	(	sqlite3 *	sqlite,
		const char *	tmp_prefix,
		const char *	output_dir,
		int *	not_repaired,
		char **	err_msg
	)

Sanitizes all Geometry Columns making all invalid geometries to be valid.

Parameters:

sqlite	handle to current DB connection
tmp_prefix	name-prefix for temporary tables
output_dir	pathname of the directory to be created for report-files
not_repaired	if this variable is not NULL on successful completion will contain the total count of repair failures (i.e. Geometries beyond possible repair)
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

sanitize_all_geometry_columns_r, check_geometry_column, check_all_geometry_columns, sanitize_geometry_column

Note:

this function will attempt to make valid all invalid geometries found within all Geometry Columns (vector layers); a temporary table is required so to support each input table.
if the process has full success the temprary table will be deleted; otherwise it will be preserved for further inspection. a HTML report will be produced as well.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
not reentrant and thread unsafe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int sanitize_all_geometry_columns_r	(	const void *	p_cache,
		sqlite3 *	sqlite,
		const char *	tmp_prefix,
		const char *	output_dir,
		int *	not_repaired,
		char **	err_msg
	)

Sanitizes all Geometry Columns making all invalid geometries to be valid.

Parameters:

p_cache	a memory pointer returned by spatialite_alloc_connection()
sqlite	handle to current DB connection
tmp_prefix	name-prefix for temporary tables
output_dir	pathname of the directory to be created for report-files
not_repaired	if this variable is not NULL on successful completion will contain the total count of repair failures (i.e. Geometries beyond possible repair)
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

sanitize_all_geometry_columns, check_geometry_column, check_all_geometry_columns, sanitize_geometry_column

Note:

this function will attempt to make valid all invalid geometries found within all Geometry Columns (vector layers); a temporary table is required so to support each input table.
if the process has full success the temprary table will be deleted; otherwise it will be preserved for further inspection. a HTML report will be produced as well.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
reentrant and thread-safe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int sanitize_geometry_column	(	sqlite3 *	sqlite,
		const char *	table,
		const char *	geom,
		const char *	tmp_table,
		const char *	report_path,
		int *	n_invalids,
		int *	n_repaired,
		int *	n_discarded,
		int *	n_failures,
		char **	err_msg
	)

Sanitizes a Geometry Column making all invalid geometries to be valid.

Parameters:

sqlite	handle to current DB connection
table	name of the table
geometry	name of the column to be checked
tmp_table	name of the temporary table
report_path	pathname of the report-file
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found into the sanitize table
n_repaired	if this variable is not NULL on successful completion will contain the total number of repaired Geometries
n_discarded	if this variable is not NULL on successful completion will contain the total number of repaired Geometries (by discarding fragments)
n_failures	if this variable is not NULL on successful completion will contain the total number of repair failures (i.e. Geometries beyond possible repair)
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

sanitize_geometry_column_r, check_geometry_column, check_all_geometry_columns, sanitize_all_geometry_columns

Note:

this function will attempt to make valid all invalid geometries found within a Geometry Column (layer); a temporary table is required.
if the process has full success the temprary table will be deleted; otherwise it will be preserved for further inspection. a HTML report will be produced as well.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
not reentrant and thread unsafe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int sanitize_geometry_column_r	(	const void *	p_cache,
		sqlite3 *	sqlite,
		const char *	table,
		const char *	geom,
		const char *	tmp_table,
		const char *	report_path,
		int *	n_invalids,
		int *	n_repaired,
		int *	n_discarded,
		int *	n_failures,
		char **	err_msg
	)

Sanitizes a Geometry Column making all invalid geometries to be valid.

Parameters:

p_cache	a memory pointer returned by spatialite_alloc_connection()
sqlite	handle to current DB connection
table	name of the table
geometry	name of the column to be checked
tmp_table	name of the temporary table
report_path	pathname of the report-file
n_invalids	if this variable is not NULL on successful completion will contain the total number of invalid Geometries found into the sanitize table
n_repaired	if this variable is not NULL on successful completion will contain the total number of repaired Geometries
n_discarded	if this variable is not NULL on successful completion will contain the total number of repaired Geometries (by discarding fragments)
n_failures	if this variable is not NULL on successful completion will contain the total number of repair failures (i.e. Geometries beyond possible repair)
err_msg	if this variable is not NULL and the return status is ZERO (failure), an appropriate error message will be returned

See also:

sanitize_geometry_column, check_geometry_column, check_all_geometry_columns, sanitize_all_geometry_columns

Note:

this function will attempt to make valid all invalid geometries found within a Geometry Column (layer); a temporary table is required.
if the process has full success the temprary table will be deleted; otherwise it will be preserved for further inspection. a HTML report will be produced as well.
an eventual error message returned via err_msg requires to be deallocated by invoking free()
reentrant and thread-safe.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int spatial_ref_sys_init	(	sqlite3 *	sqlite,
		int	verbose
	)

Inserts the inlined EPSG dataset into the "spatial_ref_sys" table.

Parameters:

sqlite	handle to current DB connection
verbose	if TRUE a short report is shown on stderr

Returns:

0 on failure, any other value on success

See also:

spatial_ref_sys_init2

Note:

this function is internally invoked by the SQL function InitSpatialMetadata(), and is not usually intended for direct use. This functions is now deprecated, and will simply call spatial_ref_sys_init2(sqlite, GAIA_EPSG_ANY, verbose).

SPATIALITE_DECLARE int spatial_ref_sys_init2	(	sqlite3 *	sqlite,
		int	mode,
		int	verbose
	)

Inserts the inlined EPSG dataset into the "spatial_ref_sys" table.

Parameters:

sqlite	handle to current DB connection
mode	can be one of GAIA_EPSG_ANY, GAIA_EPSG_NONE or GAIA_EPSG_WGS84_ONLY
verbose	if TRUE a short report is shown on stderr

Returns:

0 on failure, any other value on success

Note:

this function is internally invoked by the SQL function InitSpatialMetadata(), and is not usually intended for direct use.

SPATIALITE_DECLARE void* spatialite_alloc_connection

(

void

)

Initializes the internal memory block supporting each connection.

See also:

spatialite_init_ex, spatialite_cleanup_ex

Examples:

demo1.c, demo2.c, demo3.c, demo4.c, and demo5.c.

SPATIALITE_DECLARE void spatialite_cleanup

(

void

)

Cleanup a SpatiaLite connection.

This function is now DEPRECATED; use spatialite_cleanup_ex() for all new development.

This function performs general cleanup, essentially undoing the effect of spatialite_init().

See also:

spatialite_init

SPATIALITE_DECLARE void spatialite_cleanup_ex

(

const void *

ptr

)

Cleanup a SpatiaLite connection.

This function performs general cleanup, essentially undoing the effect of spatialite_init_ex().

Parameters:

ptr	the same memory pointer passed to the corresponding call to spatialite_init_ex() and returned by spatialite_alloc_connection()

See also:

spatialite_init_ex, spatialite_alloc_connection

Examples:

demo1.c, demo2.c, demo3.c, demo4.c, and demo5.c.

SPATIALITE_DECLARE void spatialite_init

(

int

verbose

)

Initializes a SpatiaLite connection.

This function is now DEPRECATED because is not reentrant (not thread safe); use spatialite_init_ex() for all new development.

Parameters:

verbose

if TRUE a short start-up message is shown on stderr

See also:

spatialite_cleanup, spatialite_init_ex

Note:

You absolutely must invoke this function before attempting to perform any other SpatiaLite's call.

SPATIALITE_DECLARE void spatialite_init_ex	(	sqlite3 *	db_handle,
		const void *	ptr,
		int	verbose
	)

Initializes a SpatiaLite connection.

Parameters:

db_handle	handle to the current SQLite connection
ptr	a memory pointer returned by spatialite_alloc_connection()
verbose	if TRUE a short start-up message is shown on stderr

See also:

spatialite_alloc_connection, spatialite_cleanup_ex, spatialite_init

Note:

You absolutely must invoke this function before attempting to perform any other SpatiaLite's call.

Examples:

demo1.c, demo2.c, demo3.c, demo4.c, and demo5.c.

SPATIALITE_DECLARE void spatialite_init_geos

(

void

)

Initializes the GEOS library.

Note:

You are never supposed to invoke this function (internally handled).

SPATIALITE_DECLARE void spatialite_initialize

(

void

)

Initializes the library.

Note:

you are always expected to explicitly call this function before attempting to call any SpatiaLite own function.

SPATIALITE_DECLARE void spatialite_shutdown

(

void

)

Finalizes the library.

Note:

you are always expected to explicitly call this function immediately before exiting the main application.
This function will free any memory allocation and will release any system resource internally used by the library.

Examples:

demo1.c, demo2.c, demo3.c, demo4.c, and demo5.c.

SPATIALITE_DECLARE const char* spatialite_target_cpu

(

void

)

Return the target CPU name.

Returns:

the target CPU string.

SPATIALITE_DECLARE const char* spatialite_version

(

void

)

Return the current library version.

Returns:

the version string.

Examples:

demo1.c, demo3.c, demo4.c, and demo5.c.

SPATIALITE_DECLARE char* srid_get_axis	(	sqlite3 *	sqlite,
		int	srid,
		char	axis,
		char	mode
	)

checks a SRID definition from the "spatial_ref_sys" table then returning an Axis definition

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition
axis	should be one of SPLITE_AXIS_1 or SPLITE_AXIS_2
mode	should be one of SPLITE_AXIS_NAME or SPLITE_AXIS_ORIENTATION

Returns:

the reqested name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE char* srid_get_datum	(	sqlite3 *	sqlite,
		int	srid
	)

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Datum name

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

the Datum name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE char* srid_get_prime_meridian	(	sqlite3 *	sqlite,
		int	srid
	)

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Prime Meridian name

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

the Prime Meridian name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE char* srid_get_projection	(	sqlite3 *	sqlite,
		int	srid
	)

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Projection name

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

the Projection name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE char* srid_get_spheroid	(	sqlite3 *	sqlite,
		int	srid
	)

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Spheroid name

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

the Spheroid name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE char* srid_get_unit	(	sqlite3 *	sqlite,
		int	srid
	)

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Unit name

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition

Returns:

the Unit name on succes, NULL on failure

Note:

you are responsible for freeing the returned name.

SPATIALITE_DECLARE int srid_has_flipped_axes	(	sqlite3 *	sqlite,
		int	srid,
		int *	flipped
	)

checks a SRID definition from the "spatial_ref_sys" table determining if the axes order is X-Y or Y-X

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition
flipped	on successful completion will contain 0 (FALSE) if axes order is X-Y, any other value (TRUE) if axes order is Y-X.

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int srid_is_geographic	(	sqlite3 *	sqlite,
		int	srid,
		int *	geographic
	)

checks a SRID definition from the "spatial_ref_sys" table determining if it is of the geographic type

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition
geographic	on successful completion will contain TRUE or FALSE

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int srid_is_projected	(	sqlite3 *	sqlite,
		int	srid,
		int *	projected
	)

checks a SRID definition from the "spatial_ref_sys" table determining if it is of the projected type

Parameters:

sqlite	handle to current DB connection
srid	the SRID value uniquely identifying the required EPSG definition
projected	on successful completion will contain TRUE or FALSE

Returns:

0 on failure, any other value on success

SPATIALITE_DECLARE int update_layer_statistics	(	sqlite3 *	sqlite,
		const char *	table,
		const char *	column
	)

Updates the LAYER_STATICS metadata table.

Parameters:

sqlite	handle to current DB connection
table	name of the table to be processed
column	name of the geometry to be processed

Note:

this function will explore the given table/geometry determining the number of rows and the full layer extent; a corresponding table/geometry entry is expected to be already declared in the GEOMETRY_COLUMNS table. These informations will be permanently stored into the LAYER_STATISTICS table; if such table does not yet exists will be implicitly created.

• if table is NULL, any entry found within GEOMETRY_COLUMNS will be processed.
• if table is not NULL and column is NULL, any geometry belonging to the given table will be processed.
• if both table and column are not NULL, then only the given entry will be processed.

See also:

gaiaStatisticsInvalidate, gaiaGetLayerExtent, gaiaGetVectorLayersList

Returns:

0 on failure, the total count of processed entries on success