pg_operator.h

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/*-------------------------------------------------------------------------
 *
 * pg_operator.h
 *    definition of the "operator" system catalog (pg_operator)
 *
 *
 * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_operator.h
 *
 * NOTES
 *    The Catalog.pm module reads this file and derives schema
 *    information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_OPERATOR_H
#define PG_OPERATOR_H
 
#include "catalog/genbki.h"
#include "catalog/objectaddress.h"
#include "catalog/pg_operator_d.h"
#include "nodes/pg_list.h"
 
/* ----------------
 *      pg_operator definition.  cpp turns this into
 *      typedef struct FormData_pg_operator
 * ----------------
 */
CATALOG(pg_operator,2617,OperatorRelationId)
{
    Oid         oid;            /* oid */
 
    /* name of operator */
    NameData    oprname;
 
    /* OID of namespace containing this oper */
    Oid         oprnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
    /* operator owner */
    Oid         oprowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
    /* 'l' for prefix or 'b' for infix */
    char        oprkind BKI_DEFAULT(b);
 
    /* can be used in merge join? */
    bool        oprcanmerge BKI_DEFAULT(f);
 
    /* can be used in hash join? */
    bool        oprcanhash BKI_DEFAULT(f);
 
    /* left arg type, or 0 if prefix operator */
    Oid         oprleft BKI_LOOKUP_OPT(pg_type);
 
    /* right arg type */
    Oid         oprright BKI_LOOKUP(pg_type);
 
    /* result datatype; can be 0 in a "shell" operator */
    Oid         oprresult BKI_LOOKUP_OPT(pg_type);
 
    /* OID of commutator oper, or 0 if none */
    Oid         oprcom BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_operator);
 
    /* OID of negator oper, or 0 if none */
    Oid         oprnegate BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_operator);
 
    /* OID of underlying function; can be 0 in a "shell" operator */
    regproc     oprcode BKI_LOOKUP_OPT(pg_proc);
 
    /* OID of restriction estimator, or 0 */
    regproc     oprrest BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
 
    /* OID of join estimator, or 0 */
    regproc     oprjoin BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
} FormData_pg_operator;
 
/* ----------------
 *      Form_pg_operator corresponds to a pointer to a tuple with
 *      the format of pg_operator relation.
 * ----------------
 */
typedef FormData_pg_operator *Form_pg_operator;
 
DECLARE_UNIQUE_INDEX_PKEY(pg_operator_oid_index, 2688, OperatorOidIndexId, on pg_operator using btree(oid oid_ops));
DECLARE_UNIQUE_INDEX(pg_operator_oprname_l_r_n_index, 2689, OperatorNameNspIndexId, on pg_operator using btree(oprname name_ops, oprleft oid_ops, oprright oid_ops, oprnamespace oid_ops));
 
 
extern ObjectAddress OperatorCreate(const char *operatorName,
                                    Oid operatorNamespace,
                                    Oid leftTypeId,
                                    Oid rightTypeId,
                                    Oid procedureId,
                                    List *commutatorName,
                                    List *negatorName,
                                    Oid restrictionId,
                                    Oid joinId,
                                    bool canMerge,
                                    bool canHash);
 
extern ObjectAddress makeOperatorDependencies(HeapTuple tuple,
                                              bool makeExtensionDep,
                                              bool isUpdate);
 
extern void OperatorUpd(Oid baseId, Oid commId, Oid negId, bool isDelete);
 
#endif                          /* PG_OPERATOR_H */