为安装PL/pgSQL创建了名为"plpgsqlHandle()"的处理程序。要在"SwineDB"数据库中创建处理程序，需要发出命令：( )
SwineDB =# CREATE LANGUAGE 'pl/pgsql' HANDLER plpgsqlHandle
SwineDB-# LANCOMPILER 'Install PL/pgSQL';
CREATE
SwineDB =# CREATE LANGUAGE 'pl/pgsql' EXECUTE plpgsqlHandle
SwineDB-# LANCOMPILER 'Install PL/pgSQL';
CREATE
SwineDB =# CREATE LANGUAGE 'plpgsql' HANDLER plpgsqlHandle
SwineDB-# LANCOMPILER 'Install PL/pgSQL';
CREATE
SwineDB =# CREATE LANGUAGE 'plpgsql' EXECUTE plpgsqlHandle
SwineDB-# LANCOMPILER 'Install PL/pgSQL';
CREATE
