return $this->exec('DROP TABLE IF EXISTS '.$sTableName.' CASCADE') == 0;
}
- /**
- * Check if an index exists in the database. Optional filtered by tablename
- *
- * @param string $sTableName
- *
- * @return boolean
- */
- public function indexExists($sIndexName, $sTableName = null)
- {
- return in_array($sIndexName, $this->getListOfIndices($sTableName));
- }
-
- /**
- * Returns a list of index names in the database, optional filtered by tablename
- *
- * @param string $sTableName
- *
- * @return array
- */
- public function getListOfIndices($sTableName = null)
- {
- // table_name | index_name | column_name
- // -----------------------+---------------------------------+--------------
- // country_name | idx_country_name_country_code | country_code
- // country_osm_grid | idx_country_osm_grid_geometry | geometry
- // import_polygon_delete | idx_import_polygon_delete_osmid | osm_id
- // import_polygon_delete | idx_import_polygon_delete_osmid | osm_type
- // import_polygon_error | idx_import_polygon_error_osmid | osm_id
- // import_polygon_error | idx_import_polygon_error_osmid | osm_type
- $sSql = <<< END
-SELECT
- t.relname as table_name,
- i.relname as index_name,
- a.attname as column_name
-FROM
- pg_class t,
- pg_class i,
- pg_index ix,
- pg_attribute a
-WHERE
- t.oid = ix.indrelid
- and i.oid = ix.indexrelid
- and a.attrelid = t.oid
- and a.attnum = ANY(ix.indkey)
- and t.relkind = 'r'
- and i.relname NOT LIKE 'pg_%'
- FILTERS
- ORDER BY
- t.relname,
- i.relname,
- a.attname
-END;
-
- $aRows = null;
- if ($sTableName) {
- $sSql = str_replace('FILTERS', 'and t.relname = :tablename', $sSql);
- $aRows = $this->getAll($sSql, array(':tablename' => $sTableName));
- } else {
- $sSql = str_replace('FILTERS', '', $sSql);
- $aRows = $this->getAll($sSql);
- }
-
- $aIndexNames = array_unique(array_map(function ($aRow) {
- return $aRow['index_name'];
- }, $aRows));
- sort($aIndexNames);
-
- return $aIndexNames;
- }
-
/**
* Tries to connect to the database but on failure doesn't throw an exception.
*