Function spatialite_sys::update_layer_statistics

pub unsafe extern "C" fn update_layer_statistics(
    sqlite: *mut sqlite3, 
    table: *const c_char, 
    column: *const c_char
) -> c_int

Updates the LAYER_STATICS metadata table

\param sqlite handle to current DB connection \param table name of the table to be processed \param 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.

\sa gaiaStatisticsInvalidate, gaiaGetLayerExtent, gaiaGetVectorLayersList

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