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/*-------------------------------------------------------------------------
*
* pg_index.h
* definition of the "index" system catalog (pg_index)
*
*
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_index.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_INDEX_H
#define PG_INDEX_H
#include "catalog/genbki.h"
#include "catalog/pg_index_d.h"
/* ----------------
* pg_index definition. cpp turns this into
* typedef struct FormData_pg_index.
* ----------------
*/
CATALOG(pg_index,2610,IndexRelationId) BKI_SCHEMA_MACRO
{
Oid indexrelid BKI_LOOKUP(pg_class); /* OID of the index */
Oid indrelid BKI_LOOKUP(pg_class); /* OID of the relation it
* indexes */
int16 indnatts; /* total number of columns in index */
int16 indnkeyatts; /* number of key columns in index */
bool indisunique; /* is this a unique index? */
bool indnullsnotdistinct; /* null treatment in unique index */
bool indisprimary; /* is this index for primary key? */
bool indisexclusion; /* is this index for exclusion constraint? */
bool indimmediate; /* is uniqueness enforced immediately? */
bool indisclustered; /* is this the index last clustered by? */
bool indisvalid; /* is this index valid for use by queries? */
bool indcheckxmin; /* must we wait for xmin to be old? */
bool indisready; /* is this index ready for inserts? */
bool indislive; /* is this index alive at all? */
bool indisreplident; /* is this index the identity for replication? */
/* variable-length fields start here, but we allow direct access to indkey */
int2vector indkey BKI_FORCE_NOT_NULL; /* column numbers of indexed cols,
* or 0 */
#ifdef CATALOG_VARLEN
oidvector indcollation BKI_LOOKUP_OPT(pg_collation) BKI_FORCE_NOT_NULL; /* collation identifiers */
oidvector indclass BKI_LOOKUP(pg_opclass) BKI_FORCE_NOT_NULL; /* opclass identifiers */
int2vector indoption BKI_FORCE_NOT_NULL; /* per-column flags
* (AM-specific meanings) */
pg_node_tree indexprs; /* expression trees for index attributes that
* are not simple column references; one for
* each zero entry in indkey[] */
pg_node_tree indpred; /* expression tree for predicate, if a partial
* index; else NULL */
#endif
} FormData_pg_index;
/* ----------------
* Form_pg_index corresponds to a pointer to a tuple with
* the format of pg_index relation.
* ----------------
*/
typedef FormData_pg_index *Form_pg_index;
DECLARE_INDEX(pg_index_indrelid_index, 2678, IndexIndrelidIndexId, on pg_index using btree(indrelid oid_ops));
DECLARE_UNIQUE_INDEX_PKEY(pg_index_indexrelid_index, 2679, IndexRelidIndexId, on pg_index using btree(indexrelid oid_ops));
/* indkey can contain zero (InvalidAttrNumber) to represent expressions */
DECLARE_ARRAY_FOREIGN_KEY_OPT((indrelid, indkey), pg_attribute, (attrelid, attnum));
#ifdef EXPOSE_TO_CLIENT_CODE
/*
* Index AMs that support ordered scans must support these two indoption
* bits. Otherwise, the content of the per-column indoption fields is
* open for future definition.
*/
#define INDOPTION_DESC 0x0001 /* values are in reverse order */
#define INDOPTION_NULLS_FIRST 0x0002 /* NULLs are first instead of last */
#endif /* EXPOSE_TO_CLIENT_CODE */
#endif /* PG_INDEX_H */
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