public Schema::indexExists($table, $name)

protected Schema::createPrimaryKeySql($fields)

public Schema::queryTableInformation($table)

Schema::addUniqueKey($table, $name, $fields)

protected Schema::_createKeys($table, $new_keys)

public Schema::queryFieldInformation($table, $field)

public Schema::dropUniqueKey($table, $name)

public Schema::tableExists($table) Check

protected Schema::ensureIdentifiersLength($identifier)

PostgreSQL implementation of \Drupal