greenplumn funcs 源码
greenplumn funcs 代码
文件路径：/src/backend/gpopt/utils/funcs.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Greenplum, Inc.
//
// @filename:
// funcs.cpp
//
// @doc:
// API for invoking optimizer using GPDB udfs
//
// @test:
//
//
//---------------------------------------------------------------------------
#include <sys/stat.h>
extern "C" {
#include "postgres.h"
#include "fmgr.h"
#include "lib/stringinfo.h"
#include "utils/builtins.h"
}
#include "gpos/_api.h"
#include "gpopt/gpdbwrappers.h"
#include "gpopt/utils/COptTasks.h"
#include "gpopt/utils/funcs.h"
#include "xercesc/util/XercesVersion.hpp"
//---------------------------------------------------------------------------
// @function:
// DisableXform
//
// @doc:
// Takes transformation name as input, and disables this transformation.
//
//---------------------------------------------------------------------------
extern "C" {
Datum DisableXform(PG_FUNCTION_ARGS)
{
char *szXform = text_to_cstring(PG_GETARG_TEXT_P(0));
bool is_result = COptTasks::SetXform(szXform, true /*fDisable*/);
StringInfoData str;
initStringInfo(&str);
if (is_result)
{
appendStringInfo(&str, "%s is disabled", szXform);
}
else
{
appendStringInfo(&str, "%s is not recognized", szXform);
}
text *result = cstring_to_text(str.data);
PG_RETURN_TEXT_P(result);
}
}
//---------------------------------------------------------------------------
// @function:
// EnableXform
//
// @doc:
// Takes transformation name as input, and enables this transformation.
//
//---------------------------------------------------------------------------
extern "C" {
Datum EnableXform(PG_FUNCTION_ARGS)
{
char *szXform = text_to_cstring(PG_GETARG_TEXT_P(0));
bool is_result = COptTasks::SetXform(szXform, false /*fDisable*/);
StringInfoData str;
initStringInfo(&str);
if (is_result)
{
appendStringInfo(&str, "%s is enabled", szXform);
}
else
{
appendStringInfo(&str, "%s is not recognized", szXform);
}
text *result = cstring_to_text(str.data);
PG_RETURN_TEXT_P(result);
}
}
//---------------------------------------------------------------------------
// @function:
// LibraryVersion
//
// @doc:
// Returns the optimizer and xerces library versions as a message
//
//---------------------------------------------------------------------------
extern "C" {
Datum
LibraryVersion()
{
StringInfoData str;
initStringInfo(&str);
appendStringInfo(&str, "GPOPT version: 4.0.0");
appendStringInfo(&str, ", Xerces version: %s", XERCES_FULLVERSIONDOT);
text *result = cstring_to_text(str.data);
PG_RETURN_TEXT_P(result);
}
}
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