tsmapi.h File Reference

#include "nodes/execnodes.h"
#include "nodes/pathnodes.h"

Include dependency graph for tsmapi.h:

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Data Structures

Typedefs

typedef void(* SampleScanGetSampleSize_function) (PlannerInfo *root, RelOptInfo *baserel, List *paramexprs, BlockNumber *pages, double *tuples)

typedef void(* InitSampleScan_function) (SampleScanState *node, int eflags)

typedef void(* BeginSampleScan_function) (SampleScanState *node, Datum *params, int nparams, uint32 seed)

typedef BlockNumber(* NextSampleBlock_function) (SampleScanState *node, BlockNumber nblocks)

typedef OffsetNumber(* NextSampleTuple_function) (SampleScanState *node, BlockNumber blockno, OffsetNumber maxoffset)

typedef void(* EndSampleScan_function) (SampleScanState *node)

typedef struct TsmRoutine TsmRoutine

Functions

TsmRoutine * GetTsmRoutine (Oid tsmhandler)

Typedef Documentation

◆ BeginSampleScan_function

typedef void(* BeginSampleScan_function) (SampleScanState *node, Datum *params, int nparams, uint32 seed)

Definition at line 32 of file tsmapi.h.

◆ EndSampleScan_function

typedef void(* EndSampleScan_function) (SampleScanState *node)

Definition at line 44 of file tsmapi.h.

◆ InitSampleScan_function

typedef void(* InitSampleScan_function) (SampleScanState *node, int eflags)

Definition at line 29 of file tsmapi.h.

◆ NextSampleBlock_function

typedef BlockNumber(* NextSampleBlock_function) (SampleScanState *node, BlockNumber nblocks)

Definition at line 37 of file tsmapi.h.

◆ NextSampleTuple_function

typedef OffsetNumber(* NextSampleTuple_function) (SampleScanState *node, BlockNumber blockno, OffsetNumber maxoffset)

Definition at line 40 of file tsmapi.h.

◆ SampleScanGetSampleSize_function

typedef void(* SampleScanGetSampleSize_function) (PlannerInfo *root, RelOptInfo *baserel, List *paramexprs, BlockNumber *pages, double *tuples)

Definition at line 23 of file tsmapi.h.

◆ TsmRoutine

typedef struct TsmRoutine TsmRoutine

Function Documentation

◆ GetTsmRoutine()

TsmRoutine * GetTsmRoutine ( Oid tsmhandler )

Definition at line 27 of file tablesample.c.

28{

29 Datum datum;

30 TsmRoutine *routine;

31

32 datum = OidFunctionCall1(tsmhandler, PointerGetDatum(NULL));

33 routine = (TsmRoutine *) DatumGetPointer(datum);

34

35 if (routine == NULL || !IsA(routine, TsmRoutine))

36 elog(ERROR, "tablesample handler function %u did not return a TsmRoutine struct",

37 tsmhandler);

38

39 return routine;

40}

ERROR

#define ERROR

Definition: elog.h:39

elog

#define elog(elevel,...)

Definition: elog.h:226

OidFunctionCall1

#define OidFunctionCall1(functionId, arg1)

Definition: fmgr.h:720

IsA

#define IsA(nodeptr, _type_)

Definition: nodes.h:164

PointerGetDatum

static Datum PointerGetDatum(const void *X)

Definition: postgres.h:332

Datum

uint64_t Datum

Definition: postgres.h:70

DatumGetPointer

static Pointer DatumGetPointer(Datum X)

Definition: postgres.h:322

TsmRoutine

Definition: tsmapi.h:57

References DatumGetPointer(), elog, ERROR, IsA, OidFunctionCall1, and PointerGetDatum().

Referenced by cost_samplescan(), ExecInitSampleScan(), set_tablesample_rel_pathlist(), set_tablesample_rel_size(), and transformRangeTableSample().