Press CTRL+C to copySHOW TRIGGERS [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr]
SHOW TRIGGERS
lists the triggers
currently defined for tables in a database (the default database
unless a FROM
clause is given). This
statement returns results only for databases and tables for
which you have the TRIGGER
privilege. The LIKE
clause, if
present, indicates which table names (not trigger names) to
match and causes the statement to display triggers for those
tables. The WHERE
clause can be given to
select rows using more general conditions, as discussed in
Section 28.8, “Extensions to SHOW Statements”.
For the ins_sum
trigger defined in
Section 27.4, “Using Triggers”, the output of
SHOW TRIGGERS
is as shown here:
Press CTRL+C to copymysql> SHOW TRIGGERS LIKE 'acc%'\G *************************** 1. row *************************** Trigger: ins_sum Event: INSERT Table: account Statement: SET @sum = @sum + NEW.amount Timing: BEFORE Created: 2018-08-08 10:10:12.61 sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES, NO_ZERO_IN_DATE,NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO, NO_ENGINE_SUBSTITUTION Definer: me@localhost character_set_client: utf8mb4 collation_connection: utf8mb4_0900_ai_ci Database Collation: utf8mb4_0900_ai_ci
SHOW TRIGGERS
output has these
columns:
Trigger
The name of the trigger.
Event
The trigger event. This is the type of operation on the associated table for which the trigger activates. The value is
INSERT
(a row was inserted),DELETE
(a row was deleted), orUPDATE
(a row was modified).Table
The table for which the trigger is defined.
Statement
The trigger body; that is, the statement executed when the trigger activates.
Timing
Whether the trigger activates before or after the triggering event. The value is
BEFORE
orAFTER
.Created
The date and time when the trigger was created. This is a
TIMESTAMP(2)
value (with a fractional part in hundredths of seconds) for triggers.sql_mode
The SQL mode in effect when the trigger was created, and under which the trigger executes. For the permitted values, see Section 7.1.11, “Server SQL Modes”.
Definer
The account of the user who created the trigger, in
'
format.user_name
'@'host_name
'character_set_client
The session value of the
character_set_client
system variable when the trigger was created.collation_connection
The session value of the
collation_connection
system variable when the trigger was created.Database Collation
The collation of the database with which the trigger is associated.
Trigger information is also available from the
INFORMATION_SCHEMA
TRIGGERS
table. See
Section 28.3.46, “The INFORMATION_SCHEMA TRIGGERS Table”.