Rechercher dans le manuel MySQL
25.34 The INFORMATION_SCHEMA TRIGGERS Table
The TRIGGERS
table provides
information about triggers. To see information about a table's
triggers, you must have the TRIGGER
privilege for the table.
The TRIGGERS
table has these columns:
TRIGGER_CATALOG
The name of the catalog to which the trigger belongs. This value is always
def
.TRIGGER_SCHEMA
The name of the schema (database) to which the trigger belongs.
TRIGGER_NAME
The name of the trigger.
EVENT_MANIPULATION
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).EVENT_OBJECT_CATALOG
,EVENT_OBJECT_SCHEMA
, andEVENT_OBJECT_TABLE
As noted in Section 24.3, “Using Triggers”, every trigger is associated with exactly one table. These columns indicate the catalog and schema (database) in which this table occurs, and the table name, respectively. The
EVENT_OBJECT_CATALOG
value is alwaysdef
.ACTION_ORDER
The ordinal position of the trigger's action within the list of triggers on the same table with the same
EVENT_MANIPULATION
andACTION_TIMING
values.ACTION_CONDITION
This value is always
NULL
.ACTION_STATEMENT
The trigger body; that is, the statement executed when the trigger activates. This text uses UTF-8 encoding.
ACTION_ORIENTATION
This value is always
ROW
.ACTION_TIMING
Whether the trigger activates before or after the triggering event. The value is
BEFORE
orAFTER
.ACTION_REFERENCE_OLD_TABLE
This value is always
NULL
.ACTION_REFERENCE_NEW_TABLE
This value is always
NULL
.ACTION_REFERENCE_OLD_ROW
andACTION_REFERENCE_NEW_ROW
The old and new column identifiers, respectively. The
ACTION_REFERENCE_OLD_ROW
value is alwaysOLD
and theACTION_REFERENCE_NEW_ROW
value is alwaysNEW
.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 5.1.11, “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.
Example
The following example uses the ins_sum
trigger
defined in Section 24.3, “Using Triggers”:
- *************************** 1. row ***************************
- TRIGGER_CATALOG: def
- TRIGGER_SCHEMA: test
- TRIGGER_NAME: ins_sum
- EVENT_MANIPULATION: INSERT
- EVENT_OBJECT_CATALOG: def
- EVENT_OBJECT_SCHEMA: test
- EVENT_OBJECT_TABLE: account
- ACTION_ORDER: 1
- ACTION_CONDITION: NULL
- ACTION_ORIENTATION: ROW
- ACTION_TIMING: BEFORE
- ACTION_REFERENCE_OLD_TABLE: NULL
- ACTION_REFERENCE_NEW_TABLE: NULL
- ACTION_REFERENCE_OLD_ROW: OLD
- ACTION_REFERENCE_NEW_ROW: NEW
- 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
Trigger information is also available from the
SHOW TRIGGERS
statement. See
Section 13.7.6.38, “SHOW TRIGGERS Syntax”.
Traduction non disponible
Le manuel MySQL n'est pas encore traduit en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.
Document créé le 26/06/2006, dernière modification le 26/10/2018
Source du document imprimé : https://www.gaudry.be/mysql-rf-triggers-table.html
L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.
Références
Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.