Postgresql 中文操作指南

DROP TRIGGER

DROP TRIGGER - 删除触发器

DROP TRIGGER — remove a trigger

Synopsis

DROP TRIGGER [ IF EXISTS ] name ON table_name [ CASCADE | RESTRICT ]

Description

DROP TRIGGER 删除现有的触发器定义。要执行此命令，当前用户必须是定义触发器的表的拥有者。

DROP TRIGGER removes an existing trigger definition. To execute this command, the current user must be the owner of the table for which the trigger is defined.

Parameters

  • IF EXISTS

    • Do not throw an error if the trigger does not exist. A notice is issued in this case.

  • name

    • The name of the trigger to remove.

  • table_name

    • The name (optionally schema-qualified) of the table for which the trigger is defined.

  • CASCADE

    • Automatically drop objects that depend on the trigger, and in turn all objects that depend on those objects (see Section 5.14).

  • RESTRICT

    • Refuse to drop the trigger if any objects depend on it. This is the default.

Examples

销毁表 films 上的触发器 if_dist_exists ：

Destroy the trigger if_dist_exists on the table films:

DROP TRIGGER if_dist_exists ON films;

Compatibility

PostgreSQL 中的 DROP TRIGGER 语句与 SQL 标准不兼容。在 SQL 标准中，触发器名称不适用于表，因此命令只是 DROP TRIGGER _name_ 。

The DROP TRIGGER statement in PostgreSQL is incompatible with the SQL standard. In the SQL standard, trigger names are not local to tables, so the command is simply DROP TRIGGER _name_.

See Also

CREATE TRIGGER

CREATE TRIGGER