/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*-------------------------------------------------------------------------
 *
 * instrument.h
 *	  definitions for run-time statistics collection
 *
 *
 * Portions Copyright (c) 2006-2009, Greenplum inc
 * Copyright (c) 2001-2009, PostgreSQL Global Development Group
 *
 * $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.16 2006/06/09 19:30:56 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef INSTRUMENT_H
#define INSTRUMENT_H

#include "portability/instr_time.h"

struct CdbExplain_NodeSummary;          /* private def in cdb/cdbexplain.c */


typedef struct Instrumentation
{
	/* Info about current plan cycle: */
	bool		running;		/* TRUE if we've completed first tuple */
	instr_time	starttime;		/* Start time of current iteration of node */
	instr_time	counter;		/* Accumulated runtime for this node */
	double		firsttuple;		/* Time for first tuple of this cycle */
	double		tuplecount;		/* Tuples emitted so far this cycle */
	/* Accumulated statistics across all completed cycles: */
	double		startup;		/* Max row Total startup time (in seconds) */
	double		startupLast;		/* Slowest Total startup time (in seconds) */
	double		total;			/* Max row Total total time (in seconds) */
	double		totalLast;			/* Slowest Total total time (in seconds) */
	double		ntuples;		/* Total tuples produced */
	double		nloops;			/* # of run cycles for this node */
    double		execmemused;    /* CDB: executor memory used (bytes) */
    double		workmemused;    /* CDB: work_mem actually used (bytes) */
    double		workmemwanted;  /* CDB: work_mem to avoid scratch i/o (bytes) */
	instr_time	firststart;		/* CDB: Start time of first iteration of node */
	instr_time	firststartLast;		/* CDB: Start time of first iteration of node which is slowest*/
	bool		workfileReused; /* TRUE if cached workfiles reused in this node */
	bool		workfileCreated;/* TRUE if workfiles are created in this node */
	int		numPartScanned; /* Number of part tables scanned */
    struct CdbExplain_NodeSummary  *cdbNodeSummary; /* stats from all qExecs */
} Instrumentation;

extern Instrumentation *InstrAlloc(int n);
extern void InstrStartNode(Instrumentation *instr);
extern void InstrStopNode(Instrumentation *instr, double nTuples);
extern void InstrEndLoop(Instrumentation *instr);

#endif   /* INSTRUMENT_H */