TABLESAMPLE clause
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.
Performance
Description
Specifies that a sample of the table is to be used, which is useful for use-cases such as approximate averages.
Selected version: PostgreSQL 18
Yes
Compare versions
Original documentation links
Recorded legacy identifiers: 277
Complete source facts and provenance
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
{
"Key": "tablesample-clause",
"SourceKind": "yaml",
"SourceDatabase": "center",
"SourceTable": "featurematrix.yaml",
"SourceKey": "TABLESAMPLE clause",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"Name": "TABLESAMPLE clause",
"NameLocale": "en",
"GroupKey": "performance",
"GroupName": "Performance",
"GroupLocale": "en",
"Ordinal": 50,
"GroupOrder": 5,
"Facts": {
"feature": {
"description": "Specifies that a sample of the table is to be used, which is useful for use-cases such as approximate averages.",
"name": "TABLESAMPLE clause",
"versions": {
"9.5": "Yes"
}
},
"group": "Performance",
"versions": {
"max": 18,
"min": 8.1
}
},
"Cells": [
{
"Version": "10",
"State": "yes",
"EvidenceKind": "yaml-transition",
"TransitionVersion": "9.5",
"Supported": true,
"Original": "Yes"
},
{
"Version": "11",
"State": "yes",
"EvidenceKind": "yaml-transition",
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"Supported": true,
"Original": "Yes"
},
{
"Version": "12",
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"Original": "Yes"
},
{
"Version": "13",
"State": "yes",
"EvidenceKind": "yaml-transition",
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"Supported": true,
"Original": "Yes"
},
{
"Version": "14",
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},
{
"Version": "15",
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},
{
"Version": "16",
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"Original": "Yes"
},
{
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"Original": "Yes"
},
{
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},
{
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},
{
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},
{
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"Original": "No"
},
{
"Version": "8.4",
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"Original": "No"
},
{
"Version": "9.0",
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"Original": "No"
},
{
"Version": "9.1",
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"Original": "No"
},
{
"Version": "9.2",
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"Original": "No"
},
{
"Version": "9.3",
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"Original": "No"
},
{
"Version": "9.4",
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},
{
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},
{
"Version": "9.6",
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"Original": "Yes"
}
],
"Texts": [
{
"Locale": "en",
"Title": "TABLESAMPLE clause",
"BodyHTML": "\u003cp\u003eSpecifies that a sample of the table is to be used, which is useful for use-cases such as approximate averages.\u003c/p\u003e\n",
"SourceHash": "1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd",
"ContentHash": "4b1ba50da0a95ba5ff2d6ef704e957515162f664c48039f996b48cc161954b8b",
"Payload": {
"description": "Specifies that a sample of the table is to be used, which is useful for use-cases such as approximate averages.",
"name": "TABLESAMPLE clause",
"versions": {
"9.5": "Yes"
}
}
},
{
"Locale": "zh-Hans",
"Title": "TABLESAMPLE 子句",
"BodyHTML": "\u003cp\u003e指定使用表的样本，适用于近似平均值等用例。\u003c/p\u003e\n",
"SourceHash": "071091951021357a5f492adb04caed6febf4d315ac2626ca027a48dd8ec01d50",
"ContentHash": "1d3e43324eee9019177cb7e1466462b9beb8172a4961116cd26876730d66263f",
"Payload": {
"description": "指定使用表的样本，适用于近似平均值等用例。",
"name": "TABLESAMPLE 子句"
}
}
],
"GroupTitles": {
"en": "Performance",
"zh-Hans": "性能"
},
"LegacyIDs": [
"277"
]
}