WHEN clause for CREATE TRIGGER
Recorded source states and original language descriptions. Missing version evidence stays unknown.
The source snapshot records transitions for PostgreSQL 8.1–18. The historical matrix records independent cells for 7.4–18. Neither records support for PostgreSQL 19 or 20; newer versions remain unknown. These source claims are distinct from runtime measurements.
Custom Functions, Stored Procedures, & Triggers
Description
adds support for a boolean expression to be checked if a trigger should be fired or not
Selected version: PostgreSQL 18
Yes
Compare versions
Original documentation links
Recorded legacy identifiers: 178
Complete source facts and provenance
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
{
"Key": "when-clause-for-create-trigger",
"SourceKind": "yaml",
"SourceDatabase": "center",
"SourceTable": "featurematrix.yaml",
"SourceKey": "WHEN clause for CREATE TRIGGER",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"Name": "WHEN clause for CREATE TRIGGER",
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"versions": {
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}
},
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],
"Texts": [
{
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"Title": "WHEN clause for CREATE TRIGGER",
"BodyHTML": "\u003cp\u003eadds support for a boolean expression to be checked if a trigger should be fired or not\u003c/p\u003e\n",
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},
{
"Locale": "zh-Hans",
"Title": "CREATE TRIGGER 的 WHEN 子句",
"BodyHTML": "\u003cp\u003e添加对布尔表达式的支持，用于检查触发器是否应该被触发\u003c/p\u003e\n",
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],
"GroupTitles": {
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"zh-Hans": "自定义函数、存储过程和触发器"
},
"LegacyIDs": [
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]
}