Exclusion constraints
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.
Indexing & Constraints
Description
generalizes the concept of uniqueness to support any indexable commutative operator, not just equality
Selected version: PostgreSQL 18
Yes
Compare versions
Original documentation links
Recorded legacy identifiers: 179
Complete source facts and provenance
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
{
"Key": "exclusion-constraints",
"SourceKind": "yaml",
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"SourceTable": "featurematrix.yaml",
"SourceKey": "Exclusion constraints",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"Name": "Exclusion constraints",
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"name": "Exclusion constraints",
"versions": {
"9.0": "Yes"
}
},
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],
"Texts": [
{
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"Title": "Exclusion constraints",
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},
{
"Locale": "zh-Hans",
"Title": "排他约束",
"BodyHTML": "\u003cp\u003e将唯一性概念推广为支持任何可索引的交换操作符，而不仅限于等值操作符\u003c/p\u003e\n",
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"GroupTitles": {
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"zh-Hans": "索引和约束"
},
"LegacyIDs": [
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]
}