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For those system catalogs that have a unique indexes, make a primary key and unique constraint, using ALTER TABLE ... PRIMARY KEY/UNIQUE USING INDEX. This can be helpful for GUI tools that look for a primary key, and it might in the future allow declaring foreign keys, for making schema diagrams. The constraint creation statements are automatically created by genbki.pl from DECLARE_UNIQUE_INDEX directives. To specify which one of the available unique indexes is the primary key, use the new directive DECLARE_UNIQUE_INDEX_PKEY instead. By convention, we usually make a catalog's OID column its primary key, if it has one. Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://www.postgresql.org/message-id/flat/dc5f44d9-5ec1-a596-0251-dadadcdede98@2ndquadrant.com
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_replication_origin.h
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* definition of the "replication origin" system catalog
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* (pg_replication_origin)
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*
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* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/catalog/pg_replication_origin.h
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*
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* NOTES
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* The Catalog.pm module reads this file and derives schema
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* information.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_REPLICATION_ORIGIN_H
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#define PG_REPLICATION_ORIGIN_H
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#include "access/xlogdefs.h"
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#include "catalog/genbki.h"
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#include "catalog/pg_replication_origin_d.h"
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/* ----------------
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* pg_replication_origin. cpp turns this into
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* typedef struct FormData_pg_replication_origin
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* ----------------
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*/
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CATALOG(pg_replication_origin,6000,ReplicationOriginRelationId) BKI_SHARED_RELATION
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{
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/*
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* Locally known id that get included into WAL.
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*
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* This should never leave the system.
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*
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* Needs to fit into an uint16, so we don't waste too much space in WAL
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* records. For this reason we don't use a normal Oid column here, since
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* we need to handle allocation of new values manually.
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*/
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Oid roident;
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/*
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* Variable-length fields start here, but we allow direct access to
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* roname.
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*/
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/* external, free-format, name */
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text roname BKI_FORCE_NOT_NULL;
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#ifdef CATALOG_VARLEN /* further variable-length fields */
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#endif
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} FormData_pg_replication_origin;
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typedef FormData_pg_replication_origin *Form_pg_replication_origin;
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DECLARE_TOAST(pg_replication_origin, 4181, 4182);
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#define PgReplicationOriginToastTable 4181
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#define PgReplicationOriginToastIndex 4182
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DECLARE_UNIQUE_INDEX_PKEY(pg_replication_origin_roiident_index, 6001, on pg_replication_origin using btree(roident oid_ops));
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#define ReplicationOriginIdentIndex 6001
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DECLARE_UNIQUE_INDEX(pg_replication_origin_roname_index, 6002, on pg_replication_origin using btree(roname text_ops));
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#define ReplicationOriginNameIndex 6002
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#endif /* PG_REPLICATION_ORIGIN_H */
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