/*-------------------------------------------------------------------------
 *
 * explain.h
 *	  prototypes for explain.c
 *
 * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994-5, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/commands/explain.h,v 1.34 2007/11/15 22:25:17 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef EXPLAIN_H
#define EXPLAIN_H

#include "executor/executor.h"

/* Hook for plugins to get control in ExplainOneQuery() */
typedef void (*ExplainOneQuery_hook_type) (Query *query,
													   ExplainStmt *stmt,
													 const char *queryString,
													   ParamListInfo params,
													 TupOutputState *tstate);
extern PGDLLIMPORT ExplainOneQuery_hook_type ExplainOneQuery_hook;

/* Hook for plugins to get control in explain_get_index_name() */
typedef const char *(*explain_get_index_name_hook_type) (Oid indexId);
extern PGDLLIMPORT explain_get_index_name_hook_type explain_get_index_name_hook;


extern void ExplainQuery(ExplainStmt *stmt, const char *queryString,
			 ParamListInfo params, DestReceiver *dest);

extern TupleDesc ExplainResultDesc(ExplainStmt *stmt);

extern void ExplainOneUtility(Node *utilityStmt, ExplainStmt *stmt,
				  const char *queryString,
				  ParamListInfo params,
				  TupOutputState *tstate);

extern void ExplainOnePlan(PlannedStmt *plannedstmt, ParamListInfo params,
			   ExplainStmt *stmt, TupOutputState *tstate);

#endif   /* EXPLAIN_H */
