greenplumn pg_operator 源码

greenplumn pg_operator 代码

文件路径：/src/include/catalog/pg_operator.h

/*-------------------------------------------------------------------------
 *
 * pg_operator.h
 *	  definition of the "operator" system catalog (pg_operator)
 *
 *
 * Portions Copyright (c) 1996-2019, 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/pg_operator_d.h"

#include "catalog/objectaddress.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(PGNSP);

	/* operator owner */
	Oid			oprowner BKI_DEFAULT(PGUID);

	/* 'l', 'r', or 'b' */
	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 'l' oprkind */
	Oid			oprleft BKI_LOOKUP(pg_type);

	/* right arg type, or 0 if 'r' oprkind */
	Oid			oprright BKI_LOOKUP(pg_type);

	/* result datatype */
	Oid			oprresult BKI_LOOKUP(pg_type);

	/* OID of commutator oper, or 0 if none */
	Oid			oprcom BKI_DEFAULT(0) BKI_LOOKUP(pg_operator);

	/* OID of negator oper, or 0 if none */
	Oid			oprnegate BKI_DEFAULT(0) BKI_LOOKUP(pg_operator);

	/* OID of underlying function */
	regproc		oprcode BKI_LOOKUP(pg_proc);

	/* OID of restriction estimator, or 0 */
	regproc		oprrest BKI_DEFAULT(-) BKI_LOOKUP(pg_proc);

	/* OID of join estimator, or 0 */
	regproc		oprjoin BKI_DEFAULT(-) BKI_LOOKUP(pg_proc);
} FormData_pg_operator;

/* GPDB added foreign key definitions for gpcheckcat. */
FOREIGN_KEY(oprnamespace REFERENCES pg_namespace(oid));
FOREIGN_KEY(oprowner REFERENCES pg_authid(oid));
FOREIGN_KEY(oprleft REFERENCES pg_type(oid));
FOREIGN_KEY(oprright REFERENCES pg_type(oid));
FOREIGN_KEY(oprresult REFERENCES pg_type(oid));
FOREIGN_KEY(oprcom REFERENCES pg_operator(oid));
FOREIGN_KEY(oprnegate REFERENCES pg_operator(oid));
FOREIGN_KEY(oprcode REFERENCES pg_proc(oid));
FOREIGN_KEY(oprrest REFERENCES pg_proc(oid));
FOREIGN_KEY(oprjoin REFERENCES pg_proc(oid));

/* ----------------
 *		Form_pg_operator corresponds to a pointer to a tuple with
 *		the format of pg_operator relation.
 * ----------------
 */
typedef FormData_pg_operator *Form_pg_operator;


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 isUpdate);

extern void OperatorUpd(Oid baseId, Oid commId, Oid negId, bool isDelete);

#endif							/* PG_OPERATOR_H */

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