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/*------------------------------------------------------------------------- * * pg_index.h * definition of the system "index" relation (pg_index) * along with the relation's initial contents. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/catalog/pg_index.h * * NOTES * the genbki.pl script reads this file and generates .bki * information from the DATA() statements. * *------------------------------------------------------------------------- */ #ifndef PG_INDEX_H #define PG_INDEX_H #include "catalog/genbki.h" /* ---------------- * pg_index definition. cpp turns this into * typedef struct FormData_pg_index. * ---------------- */ #define IndexRelationId 2610 CATALOG(pg_index,2610) BKI_WITHOUT_OIDS BKI_SCHEMA_MACRO { Oid indexrelid; /* OID of the index */ Oid indrelid; /* OID of the relation it indexes */ int2 indnatts; /* number of columns in index */ bool indisunique; /* is this a 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? */ /* variable-length fields start here, but we allow direct access to indkey */ int2vector indkey; /* column numbers of indexed cols, or 0 */ #ifdef CATALOG_VARLEN oidvector indcollation; /* collation identifiers */ oidvector indclass; /* opclass identifiers */ int2vector indoption; /* 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; /* ---------------- * compiler constants for pg_index * ---------------- */ #define Natts_pg_index 17 #define Anum_pg_index_indexrelid 1 #define Anum_pg_index_indrelid 2 #define Anum_pg_index_indnatts 3 #define Anum_pg_index_indisunique 4 #define Anum_pg_index_indisprimary 5 #define Anum_pg_index_indisexclusion 6 #define Anum_pg_index_indimmediate 7 #define Anum_pg_index_indisclustered 8 #define Anum_pg_index_indisvalid 9 #define Anum_pg_index_indcheckxmin 10 #define Anum_pg_index_indisready 11 #define Anum_pg_index_indkey 12 #define Anum_pg_index_indcollation 13 #define Anum_pg_index_indclass 14 #define Anum_pg_index_indoption 15 #define Anum_pg_index_indexprs 16 #define Anum_pg_index_indpred 17 /* * 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 */ /* * Use of these macros is recommended over direct examination of the state * flag columns where possible; this allows source code compatibility with * the less ugly representation used after 9.2. */ #define IndexIsValid(indexForm) ((indexForm)->indisvalid && (indexForm)->indisready) #define IndexIsReady(indexForm) ((indexForm)->indisready) #define IndexIsLive(indexForm) ((indexForm)->indisready || !(indexForm)->indisvalid) #endif /* PG_INDEX_H */