greenplumn CDXLScalarConstValue 源码
greenplumn CDXLScalarConstValue 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarConstValue.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLScalarConstValue.h
//
// @doc:
// Class for representing DXL Const Value
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarConstValue_H
#define GPDXL_CDXLScalarConstValue_H
#include "gpos/base.h"
#include "naucrates/dxl/gpdb_types.h"
#include "naucrates/dxl/operators/CDXLDatum.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarConstValue
//
// @doc:
// Class for representing DXL scalar Const value
//
//---------------------------------------------------------------------------
class CDXLScalarConstValue : public CDXLScalar
{
private:
CDXLDatum *m_dxl_datum;
public:
CDXLScalarConstValue(const CDXLScalarConstValue &) = delete;
// ctor/dtor
CDXLScalarConstValue(CMemoryPool *mp, CDXLDatum *dxl_datum);
~CDXLScalarConstValue() override;
// name of the operator
const CWStringConst *GetOpNameStr() const override;
// return the datum value
const CDXLDatum *
GetDatumVal() const
{
return m_dxl_datum;
}
// DXL Operator ID
Edxlopid GetDXLOperator() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
// conversion function
static CDXLScalarConstValue *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarConstValue == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarConstValue *>(dxl_op);
}
// does the operator return a boolean result
BOOL HasBoolResult(CMDAccessor *md_accessor) const override;
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarConstValue_H
// EOF
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony