{"Entry":{"collection":"oid","key":"xid","name":"xid","aliases":[],"metadata":{"aliases":[],"category":"Transaction and row identifiers","content_hash":"a843fead858d38f2a180bd49d568f12c72609c779047fdacefbbc53dd8c6dd2f","imported_at":"2026-09-27T17:57:59.126871+08:00","name":"xid","name_zh":"xid","slug":"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."}},"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."],"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"}]},"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":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}