{"Entry":{"collection":"oid","key":"xid","name":"xid","aliases":[],"metadata":{"aliases":[],"category":"Transaction and row identifiers","content_hash":"a843fead858d38f2a180bd49d568f12c72609c779047fdacefbbc53dd8c6dd2f","derived_content_hash":"014c04b5a33c9ba5c31515d755cf35da617b6a81cb36285573c970d7ee555f40","imported_at":"2026-09-27T17:57:59.126871+08:00","name":"xid","name_zh":"xid","repair_provenance":{"original_source_revision":"","receipt_sha256":"b26f018c9ed8ae15ecc2e807a6daeb89e8279661e96a5e11db4e3a9ce953d855","repair":"wiki-repair-20261023"},"slug":"xid","source_rev":"wiki-repair-20261023:bfdc10d33040c16c1a43552252c7b125070c231a4099bb395c63c05996141158","summary":"Another identifier type used by the system is xid , or transaction (abbreviated xact ) identifier. This is the data type of the system columns xmin and xmax . Transaction identifiers are 32-bit quantities. In some contexts, a 64-bit variant xid8 is used. Unlike xid values, xid8 values increase strictly monotonically and cannot be reused in the lifetime of a database cluster. See Section 67.1 for more details."}},"Definition":{"Collection":"oid","Key":"xid","SourceDatabase":"center","Version":"18","SourceTable":"oid_type","SourceKey":"xid","SourceRevision":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38","Facts":{"description":["Another identifier type used by the system is xid , or transaction (abbreviated xact ) identifier. This is the data type of the system columns xmin and xmax . Transaction identifiers are 32-bit quantities. In some contexts, a 64-bit variant xid8 is used. Unlike xid values, xid8 values increase strictly monotonically and cannot be reused in the lifetime of a database cluster. See Section 67.1 for more details."],"description_zh":"系统使用的另一种标识符类型是 xid，即事务 ID（事务缩写为 xact）。这是系统列 xmin 和 xmax 的数据类型。事务 ID 是 32 位量。在某些上下文中会使用 64 位变体 xid8。与 xid 值不同，xid8 值严格单调递增，并且在数据库集簇的生命周期内不会被重用。更多细节见第 67.1 节。","description_zh_html":"\u003cp\u003e\n    系统使用的另一种标识符类型是 \u003ccode class=\"type\"\u003exid\u003c/code\u003e，即事务 ID（事务缩写为 \u003cabbr class=\"abbrev\"\u003exact\u003c/abbr\u003e）。这是系统列\n    \u003ccode class=\"structfield\"\u003exmin\u003c/code\u003e 和 \u003ccode class=\"structfield\"\u003exmax\u003c/code\u003e\n    的数据类型。事务 ID 是 32 位量。在某些上下文中会使用 64 位变体 \u003ccode class=\"type\"\u003exid8\u003c/code\u003e。与 \u003ccode class=\"type\"\u003exid\u003c/code\u003e 值不同，\u003ccode class=\"type\"\u003exid8\u003c/code\u003e 值严格单调递增，并且在数据库集簇的生命周期内不会被重用。更多细节见\u003ca class=\"xref\" href=\"/zh/docs/18/transaction-id.html\" title=\"67.1. 事务与标识符\"\u003e第 67.1 节\u003c/a\u003e。\n    \u003c/p\u003e","facts":[{"label":"System columns","value":"xmin, xmax"}],"related":[{"label":"Section 67.1","url":"/docs/18/transaction-id.html"},{"label":"Section 5.6","url":"/docs/18/ddl-system-columns.html"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"PostgreSQL 18.6 Documentation","revision":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38"},"sections":[],"sources":[{"label":"PostgreSQL 18.6 Documentation","sha256":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38","url":"/docs/18/datatype-oid.html#DATATYPE-OID"},{"label":"PostgreSQL 18 online manual","url":"https://www.postgresql.org/docs/18/datatype-oid.html#DATATYPE-OID"}],"translation_provenance":{"inputs":[{"kind":"current-pgdoc-translation","path":"/Users/vonng/pgsty/pgdoc/zh/18/html/datatype-oid.html","sha256":"f7769489aed6ea9bae7befeda7d9264ccc2752ef906f9137b4d08dd3569bba21"}],"kind":"same-version-pgdoc","locale":"zh-Hans","source_revision":"b1b500221dbe5437cfca004d6b04d3f6e422765d","version":"18"},"zh_from":"same-version-pgdoc"},"ManualEvidence":{"release":{"channel":"stable","label":"18.6","major":"18","ref":"PostgreSQL 18.6 Documentation","revision":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38"},"sources":[{"label":"PostgreSQL 18.6 Documentation","sha256":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38","url":"/docs/18/datatype-oid.html#DATATYPE-OID"},{"label":"PostgreSQL 18 online manual","url":"https://www.postgresql.org/docs/18/datatype-oid.html#DATATYPE-OID"}]},"MeasuredEvidence":{}},"Text":{"Collection":"oid","Key":"xid","SourceDatabase":"center","Version":"18","Locale":"en","Title":"xid","Summary":"Another identifier type used by the system is xid , or transaction (abbreviated xact ) identifier. This is the data type of the system columns xmin and xmax . Transaction identifiers are 32-bit quantities. In some contexts, a 64-bit variant xid8 is used. Unlike xid values, xid8 values increase strictly monotonically and cannot be reused in the lifetime of a database cluster. See Section 67.1 for more details.","BodyHTML":"\u003cp\u003eAnother identifier type used by the system is xid , or transaction (abbreviated xact ) identifier. This is the data type of the system columns xmin and xmax . Transaction identifiers are 32-bit quantities. In some contexts, a 64-bit variant xid8 is used. Unlike xid values, xid8 values increase strictly monotonically and cannot be reused in the lifetime of a database cluster. See Section 67.1 for more details.\u003c/p\u003e","SourceRevision":"8b3360302225f08ae72716ce1804596de95b568e5d31f788cb4597427b28cc38","ContentHash":"5fddbfdf78cebe13b8b9db5c78146489c9f7da4ae6a4138956bc226e3e73d16c","Payload":{"description":["Another identifier type used by the system is xid , or transaction (abbreviated xact ) identifier. This is the data type of the system columns xmin and xmax . Transaction identifiers are 32-bit quantities. In some contexts, a 64-bit variant xid8 is used. Unlike xid values, xid8 values increase strictly monotonically and cannot be reused in the lifetime of a database cluster. See Section 67.1 for more details."],"related":[{"label":"Section 67.1","url":"/docs/18/transaction-id.html"},{"label":"Section 5.6","url":"/docs/18/ddl-system-columns.html"}],"sections":[]}},"RequestedLocale":"en","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}