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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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