/*-------------------------------------------------------------------------
*
* pg_amproc . h
* definition of the " access method procedure " system catalog ( pg_amproc )
*
* The amproc table identifies support procedures associated with index
* operator families and classes . These procedures can ' t be listed in pg_amop
* since they are not the implementation of any indexable operator .
*
* The primary key for this table is < amprocfamily , amproclefttype ,
* amprocrighttype , amprocnum > . The " default " support functions for a
* particular opclass within the family are those with amproclefttype =
* amprocrighttype = opclass ' s opcintype . These are the ones loaded into the
* relcache for an index and typically used for internal index operations .
* Other support functions are typically used to handle cross - type indexable
* operators with oprleft / oprright matching the entry ' s amproclefttype and
* amprocrighttype . The exact behavior depends on the index AM , however , and
* some don ' t pay attention to non - default functions at all .
*
*
* Portions Copyright ( c ) 1996 - 2025 , PostgreSQL Global Development Group
* Portions Copyright ( c ) 1994 , Regents of the University of California
*
* src / include / catalog / pg_amproc . h
*
* NOTES
* The Catalog . pm module reads this file and derives schema
* information .
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#ifndef PG_AMPROC_H
#define PG_AMPROC_H
#include "catalog/genbki.h"
#include "catalog/pg_amproc_d.h" /* IWYU pragma: export */
/* ----------------
* pg_amproc definition . cpp turns this into
* typedef struct FormData_pg_amproc
* - - - - - - - - - - - - - - - -
*/
CATALOG(pg_amproc,2603 ,AccessMethodProcedureRelationId)
{
Oid oid; /* oid */
/* the index opfamily this entry is for */
Oid amprocfamily BKI_LOOKUP(pg_opfamily);
/* procedure's left input data type */
Oid amproclefttype BKI_LOOKUP(pg_type);
/* procedure's right input data type */
Oid amprocrighttype BKI_LOOKUP(pg_type);
/* support procedure index */
int16 amprocnum;
/* OID of the proc */
regproc amproc BKI_LOOKUP(pg_proc);
} FormData_pg_amproc;
/* ----------------
* Form_pg_amproc corresponds to a pointer to a tuple with
* the format of pg_amproc relation .
* - - - - - - - - - - - - - - - -
*/
typedef FormData_pg_amproc *Form_pg_amproc;
DECLARE_UNIQUE_INDEX(pg_amproc_fam_proc_index, 2655 , AccessMethodProcedureIndexId, pg_amproc, btree(amprocfamily oid_ops, amproclefttype oid_ops, amprocrighttype oid_ops, amprocnum int2_ops));
DECLARE_UNIQUE_INDEX_PKEY(pg_amproc_oid_index, 2757 , AccessMethodProcedureOidIndexId, pg_amproc, btree(oid oid_ops));
MAKE_SYSCACHE(AMPROCNUM, pg_amproc_fam_proc_index, 16 );
#endif /* PG_AMPROC_H */
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