public Schema::dropIndex($table, $name) Drop

The maximum allowed length for index, primary key and constraint names. Value will usually be set to a 63 chars limit but PostgreSQL allows

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

protected Tasks::connect() Check

PostgreSQL implementation of

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

public Connection::getAttachedDatabases()

protected Schema::createFieldSql($name, $spec)

public static Connection::sqlFunctionConcat()

SQLite implementation of \Drupal\Cor