/**
* Usually aborts on failure
+ * @return DatabaseBase|null
*/
function open( $server, $user, $password, $dbName ) {
# Test for Postgres support, to avoid suppressed fatal error
/**
* Closes a database connection, if it is open
* Returns success, true if already closed
+ * @return bool
*/
function close() {
$this->mOpened = false;
/**
* This must be called after nextSequenceVal
+ * @return null
*/
function insertId() {
return $this->mInsertId;
* This is not necessarily an accurate estimate, so use sparingly
* Returns -1 if count cannot be found
* Takes same arguments as Database::select()
+ * @return int
*/
function estimateRowCount( $table, $vars = '*', $conds='', $fname = 'DatabasePostgres::estimateRowCount', $options = array() ) {
$options['EXPLAIN'] = true;
/**
* Returns information about an index
* If errors are explicitly ignored, returns NULL on failure
+ * @return bool|null
*/
function indexInfo( $table, $index, $fname = 'DatabasePostgres::indexInfo' ) {
$sql = "SELECT indexname FROM pg_indexes WHERE tablename='$table'";
* $conds may be "*" to copy the whole table
* srcTable may be an array of tables.
* @todo FIXME: Implement this a little better (seperate select/insert)?
+ * @return bool
*/
function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabasePostgres::insertSelect',
$insertOptions = array(), $selectOptions = array() )
/**
* Return the next in a sequence, save the value for retrieval via insertId()
+ * @return null
*/
function nextSequenceValue( $seqName ) {
$safeseq = str_replace( "'", "''", $seqName );
/**
* Return the current value of a sequence. Assumes it has been nextval'ed in this session.
+ * @return
*/
function currentSequenceValue( $seqName ) {
$safeseq = str_replace( "'", "''", $seqName );
/**
* Query whether a given relation exists (in the given schema, or the
* default mw one if not given)
+ * @return bool
*/
function relationExists( $table, $types, $schema = false ) {
global $wgDBmwschema;
/**
* For backward compatibility, this function checks both tables and
* views.
+ * @return bool
*/
function tableExists( $table, $fname = __METHOD__, $schema = false ) {
return $this->relationExists( $table, array( 'r', 'v' ), $schema );
/**
* Query whether a given schema exists. Returns true if it does, false if it doesn't.
+ * @return bool
*/
function schemaExists( $schema ) {
$exists = $this->selectField( '"pg_catalog"."pg_namespace"', 1,
/**
* Returns true if a given role (i.e. user) exists, false otherwise.
+ * @return bool
*/
function roleExists( $roleName ) {
$exists = $this->selectField( '"pg_catalog"."pg_roles"', 1,
/**
* pg_field_type() wrapper
+ * @return string
*/
function fieldType( $res, $index ) {
if ( $res instanceof ResultWrapper ) {