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| author | Bruce Momjian <bruce@momjian.us> | 2020-06-25 18:33:28 -0400 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2020-06-25 18:33:28 -0400 |
| commit | 441d4b5a3779ce4b7302d2a05b97e4fb01cc7fb7 (patch) | |
| tree | 3eb49f371abfa299ee8a1026fb9bf54b41441fcc /doc/src | |
| parent | 34c95d73aaecb0f9aba7d8ce91675edb8362ffea (diff) | |
doc: mention trigger helper functions in CREATE TRIGGER docs
Reported-by: petermpallesen@gmail.com
Discussion: https://postgr.es/m/159195294959.673.5752624528747900508@wrigleys.postgresql.org
Backpatch-through: 9.5
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/ref/create_trigger.sgml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/create_trigger.sgml b/doc/src/sgml/ref/create_trigger.sgml index 91293b7ca17..576e27f4dcc 100644 --- a/doc/src/sgml/ref/create_trigger.sgml +++ b/doc/src/sgml/ref/create_trigger.sgml @@ -448,6 +448,12 @@ UPDATE OF <replaceable>column_name1</replaceable> [, <replaceable>column_name2</ </para> <para> + There are a few built-in trigger functions that can be used to + solve common problems without having to write your own trigger code; + see <xref linkend="functions-trigger">. + </para> + + <para> In a <literal>BEFORE</> trigger, the <literal>WHEN</> condition is evaluated just before the function is or would be executed, so using <literal>WHEN</> is not materially different from testing the same |