/*-------------------------------------------------------------------------
 *
 * command.h
 *	  prototypes for command.c.
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: command.h,v 1.16 2000/01/16 20:04:58 petere Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef COMMAND_H
#define COMMAND_H

#include "utils/portal.h"

extern MemoryContext PortalExecutorHeapMemory;

/*
 * PerformPortalFetch
 *		Performs the POSTQUEL function FETCH.  Fetches count (or all if 0)
 * tuples in portal with name in the forward direction iff goForward.
 *
 * Exceptions:
 *		BadArg if forward invalid.
 *		"WARN" if portal not found.
 */
extern void PerformPortalFetch(char *name, bool forward, int count,
				   char *tag, CommandDest dest);

/*
 * PerformPortalClose
 *		Performs the POSTQUEL function CLOSE.
 */
extern void PerformPortalClose(char *name, CommandDest dest);

extern void PortalCleanup(Portal portal);

/*
 * ALTER TABLE variants
 */
extern void AlterTableAddColumn(const char *relationName,
                                bool inh, ColumnDef *colDef);

extern void AlterTableAlterColumn(const char *relationName,
                                  bool inh, const char *colName,
                                  Node *newDefault);

extern void AlterTableDropColumn(const char *relationName,
                                 bool inh, const char *colName,
                                 int behavior);

extern void AlterTableAddConstraint(const char *relationName,
                                    bool inh, Node *newConstraint);

extern void AlterTableDropConstraint(const char *relationName,
                                     bool inh, const char *constrName,
                                     int behavior);

/*
 * LOCK
 */
extern void LockTableCommand(LockStmt *lockstmt);

#endif	 /* COMMAND_H */
