{"Entry":{"collection":"oid","key":"xid8","name":"xid8","aliases":[],"metadata":{"aliases":[],"category":"Transaction and row identifiers","content_hash":"0f1b788cd324f2406f1c461f19c76f0ce72fee217e8e373e2e7e4f89721144cb","imported_at":"2026-09-27T17:57:59.12847+08:00","name":"xid8","name_zh":"xid8","slug":"xid8","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":"xid8","SourceDatabase":"center","Version":"18","SourceTable":"oid_type","SourceKey":"xid8","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":[],"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":"xid8","SourceDatabase":"center","Version":"18","Locale":"en","Title":"xid8","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":"d4581158f331e49bc5cdbebfb7e259dca5113d0196a02c25bf96cbcd213a9df9","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":["13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}