greenplumn CDXLOperator 源码
greenplumn CDXLOperator 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLOperator.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLOperator.cpp
//
// @doc:
// Implementation of base DXL operator class
//---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLOperator.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpdxl;
using namespace gpmd;
//---------------------------------------------------------------------------
// @function:
// CDXLOperator::CDXLOperator
//
// @doc:
// Constructor
//
//---------------------------------------------------------------------------
CDXLOperator::CDXLOperator(CMemoryPool *mp) : m_mp(mp)
{
}
//---------------------------------------------------------------------------
// @function:
// CDXLOperator::~CDXLOperator
//
// @doc:
// Dtor
//
//---------------------------------------------------------------------------
CDXLOperator::~CDXLOperator() = default;
//---------------------------------------------------------------------------
// @function:
// CDXLOperator::GetJoinTypeNameStr
//
// @doc:
// Join type name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLOperator::GetJoinTypeNameStr(EdxlJoinType join_type)
{
GPOS_ASSERT(EdxljtSentinel > join_type);
switch (join_type)
{
case EdxljtInner:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinInner);
case EdxljtLeft:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinLeft);
case EdxljtFull:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinFull);
case EdxljtRight:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinRight);
case EdxljtIn:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinIn);
case EdxljtLeftAntiSemijoin:
return CDXLTokens::GetDXLTokenStr(EdxltokenJoinLeftAntiSemiJoin);
case EdxljtLeftAntiSemijoinNotIn:
return CDXLTokens::GetDXLTokenStr(
EdxltokenJoinLeftAntiSemiJoinNotIn);
default:
return CDXLTokens::GetDXLTokenStr(EdxltokenUnknown);
}
}
//---------------------------------------------------------------------------
// @function:
// CDXLOperator::GetIdxScanDirectionStr
//
// @doc:
// Return the index scan direction name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLOperator::GetIdxScanDirectionStr(EdxlIndexScanDirection idx_scan_direction)
{
switch (idx_scan_direction)
{
case EdxlisdBackward:
return CDXLTokens::GetDXLTokenStr(
EdxltokenIndexScanDirectionBackward);
case EdxlisdForward:
return CDXLTokens::GetDXLTokenStr(
EdxltokenIndexScanDirectionForward);
case EdxlisdNoMovement:
return CDXLTokens::GetDXLTokenStr(
EdxltokenIndexScanDirectionNoMovement);
default:
GPOS_ASSERT(!"Unrecognized index scan direction");
return CDXLTokens::GetDXLTokenStr(EdxltokenUnknown);
}
}
// EOF
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