# 37.2\. 事件触发器触发矩阵 [Table 37-1](#calibre_link-1302)列出了所有支持事件触发器的命令。 **Table 37-1\. 命令标记支持的事件触发器** | 命令标记 | `ddl_command_start` | `ddl_command_end` | `sql_drop` | | --- | --- | --- | --- | | `ALTER AGGREGATE` | `X` | `X` | `-` | | `ALTER COLLATION` | `X` | `X` | `-` | | `ALTER CONVERSION` | `X` | `X` | `-` | | `ALTER DOMAIN` | `X` | `X` | `-` | | `ALTER EXTENSION` | `X` | `X` | `-` | | `ALTER FOREIGN DATA WRAPPER` | `X` | `X` | `-` | | `ALTER FOREIGN TABLE` | `X` | `X` | `X` | | `ALTER FUNCTION` | `X` | `X` | `-` | | `ALTER LANGUAGE` | `X` | `X` | `-` | | `ALTER OPERATOR` | `X` | `X` | `-` | | `ALTER OPERATOR CLASS` | `X` | `X` | `-` | | `ALTER OPERATOR FAMILY` | `X` | `X` | `-` | | `ALTER SCHEMA` | `X` | `X` | `-` | | `ALTER SEQUENCE` | `X` | `X` | `-` | | `ALTER SERVER` | `X` | `X` | `-` | | `ALTER TABLE` | `X` | `X` | `X` | | `ALTER TEXT SEARCH CONFIGURATION` | `X` | `X` | `-` | | `ALTER TEXT SEARCH DICTIONARY` | `X` | `X` | `-` | | `ALTER TEXT SEARCH PARSER` | `X` | `X` | `-` | | `ALTER TEXT SEARCH TEMPLATE` | `X` | `X` | `-` | | `ALTER TRIGGER` | `X` | `X` | `-` | | `ALTER TYPE` | `X` | `X` | `-` | | `ALTER USER MAPPING` | `X` | `X` | `-` | | `ALTER VIEW` | `X` | `X` | `-` | | `CREATE AGGREGATE` | `X` | `X` | `-` | | `CREATE CAST` | `X` | `X` | `-` | | `CREATE COLLATION` | `X` | `X` | `-` | | `CREATE CONVERSION` | `X` | `X` | `-` | | `CREATE DOMAIN` | `X` | `X` | `-` | | `CREATE EXTENSION` | `X` | `X` | `-` | | `CREATE FOREIGN DATA WRAPPER` | `X` | `X` | `-` | | `CREATE FOREIGN TABLE` | `X` | `X` | `-` | | `CREATE FUNCTION` | `X` | `X` | `-` | | `CREATE INDEX` | `X` | `X` | `-` | | `CREATE LANGUAGE` | `X` | `X` | `-` | | `CREATE OPERATOR` | `X` | `X` | `-` | | `CREATE OPERATOR CLASS` | `X` | `X` | `-` | | `CREATE OPERATOR FAMILY` | `X` | `X` | `-` | | `CREATE RULE` | `X` | `X` | `-` | | `CREATE SCHEMA` | `X` | `X` | `-` | | `CREATE SEQUENCE` | `X` | `X` | `-` | | `CREATE SERVER` | `X` | `X` | `-` | | `CREATE TABLE` | `X` | `X` | `-` | | `CREATE TABLE AS` | `X` | `X` | `-` | | `CREATE TEXT SEARCH CONFIGURATION` | `X` | `X` | `-` | | `CREATE TEXT SEARCH DICTIONARY` | `X` | `X` | `-` | | `CREATE TEXT SEARCH PARSER` | `X` | `X` | `-` | | `CREATE TEXT SEARCH TEMPLATE` | `X` | `X` | `-` | | `CREATE TRIGGER` | `X` | `X` | `-` | | `CREATE TYPE` | `X` | `X` | `-` | | `CREATE USER MAPPING` | `X` | `X` | `-` | | `CREATE VIEW` | `X` | `X` | `-` | | `DROP AGGREGATE` | `X` | `X` | `X` | | `DROP CAST` | `X` | `X` | `X` | | `DROP COLLATION` | `X` | `X` | `X` | | `DROP CONVERSION` | `X` | `X` | `X` | | `DROP DOMAIN` | `X` | `X` | `X` | | `DROP EXTENSION` | `X` | `X` | `X` | | `DROP FOREIGN DATA WRAPPER` | `X` | `X` | `X` | | `DROP FOREIGN TABLE` | `X` | `X` | `X` | | `DROP FUNCTION` | `X` | `X` | `X` | | `DROP INDEX` | `X` | `X` | `X` | | `DROP LANGUAGE` | `X` | `X` | `X` | | `DROP OPERATOR` | `X` | `X` | `X` | | `DROP OPERATOR CLASS` | `X` | `X` | `X` | | `DROP OPERATOR FAMILY` | `X` | `X` | `X` | | `DROP OWNED` | `X` | `X` | `X` | | `DROP RULE` | `X` | `X` | `X` | | `DROP SCHEMA` | `X` | `X` | `X` | | `DROP SEQUENCE` | `X` | `X` | `X` | | `DROP SERVER` | `X` | `X` | `X` | | `DROP TABLE` | `X` | `X` | `X` | | `DROP TEXT SEARCH CONFIGURATION` | `X` | `X` | `X` | | `DROP TEXT SEARCH DICTIONARY` | `X` | `X` | `X` | | `DROP TEXT SEARCH PARSER` | `X` | `X` | `X` | | `DROP TEXT SEARCH TEMPLATE` | `X` | `X` | `X` | | `DROP TRIGGER` | `X` | `X` | `X` | | `DROP TYPE` | `X` | `X` | `X` | | `DROP USER MAPPING` | `X` | `X` | `X` | | `DROP VIEW` | `X` | `X` | `X` | | `SELECT INTO` | `X` | `X` | `-` |