/**
* Get the last insert ID from the driver after performing an insert on a table
* with an auto-incrementing primary key, or null on failure.
*
* @return int|null
*/
public function lastInsertId()
{
$table = $this->adapter->getLastInsertTableName();
// No table name available, so let's bail
if (!$table) {
return null;
}
$meta = $this->adapter->getTableMetadata($table);
if ($meta) {
foreach ($meta['columns'] as $name => $columnMeta) {
if ($columnMeta['PRIMARY'] && $columnMeta['IDENTITY']) {
$currval = $this->fetchOne('SELECT CURRVAL(PG_GET_SERIAL_SEQUENCE(?, ?))', [$table, $name]);
// Account for possibility of non-serial integer key with default of nextval(sequence)
if (null === $currval) {
$currval = $this->fetchOne('SELECT
CURRVAL(SUBSTRING(column_default FROM \'(?i)nextval\\\\(\'\'([^\'\']+)\'))
FROM information_schema.columns
WHERE table_name = ?
AND column_name = ?', [$table, $name]);
}
return $currval;
}
}
}
return null;
}