greenplumn analyzeutils 源码
greenplumn analyzeutils 代码
文件路径：/src/include/commands/analyzeutils.h
/*-------------------------------------------------------------------------
*
* analyzeutils.h
*
* Header file for utils functions in analyzeutils.c
*
* Copyright (c) 2015, VMware, Inc. or its affiliates.
*
*-------------------------------------------------------------------------
*/
#ifndef ANALYZEUTILS_H
#define ANALYZEUTILS_H
#include "commands/vacuum.h"
typedef struct TypInfo
{
Oid typOid;
bool typbyval;
int16 typlen;
Oid collid;
Oid ltFuncOp; /* oid of 'less than' operator function id of this type */
Oid eqFuncOp; /* oid of equality operator function id of this type */
FmgrInfo hashfunc; /* hash function */
} TypInfo;
/* Functions and structures used for aggregating leaf partition stats */
typedef struct MCVFreqPair
{
Datum mcv;
float4 count;
TypInfo *typinfo; /* type information of datum type */
} MCVFreqPair;
/* extern functions called by commands/analyze.c */
extern MCVFreqPair **aggregate_leaf_partition_MCVs(Oid relationOid,
AttrNumber attnum,
int numPartitions,
HeapTuple *heaptupleStats,
float4 *relTuples,
unsigned int nEntries,
double ndistinct,
int *num_mcv,
int *rem_mcv,
void **result);
extern float4 get_rel_reltuples(Oid relid);
extern int32 get_rel_relpages(Oid relid);
extern int aggregate_leaf_partition_histograms(Oid relationOid,
AttrNumber attnum,
int nParts,
HeapTuple *heaptupleStats,
float4 *relTuples,
unsigned int nEntries,
MCVFreqPair **mcvpairArray,
int rem_mcv,
void **result);
extern bool needs_sample(VacAttrStats **vacattrstats, int attr_cnt);
extern AttrNumber fetch_leaf_attnum(Oid leafRelid, const char* attname);
extern HeapTuple fetch_leaf_att_stats(Oid leafRelid, AttrNumber leafAttNum);
extern bool leaf_parts_analyzed(Oid attrelid, Oid relid_exclude, List *va_cols, int elevel);
#endif /* ANALYZEUTILS_H */
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