greenplumn CDXLScalarOpList 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarOpList.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CDXLScalarOpList.h
/
/ @doc:
/ Class for representing DXL list of scalar expressions
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarOpList_H
#define GPDXL_CDXLScalarOpList_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
using namespace gpmd;
/---------------------------------------------------------------------------
/ @class:
/ CDXLScalarOpList
/
/ @doc:
/ Class for representing DXL list of scalar expressions
/
/---------------------------------------------------------------------------
class CDXLScalarOpList : public CDXLScalar
{
public:
/ type of the operator list
enum EdxlOpListType
{
EdxloplistEqFilterList,
EdxloplistFilterList,
EdxloplistGeneral,
EdxloplistSentinel
};
private:
/ operator list type
EdxlOpListType m_dxl_op_list_type;
public:
CDXLScalarOpList(const CDXLScalarOpList &) = delete;
/ ctor
CDXLScalarOpList(CMemoryPool *mp,
EdxlOpListType dxl_op_list_type = EdxloplistGeneral);
/ operator type
Edxlopid GetDXLOperator() const override;
/ operator name
const CWStringConst *GetOpNameStr() const override;
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
/ does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * /md_accessor
) const override
{
return false;
}
#ifdef GPOS_DEBUG
/ checks whether the operator has valid structure, i.e. number and
/ types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif / GPOS_DEBUG
/ conversion function
static CDXLScalarOpList *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarOpList == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarOpList *>(dxl_op);
}
};
} / namespace gpdxl
#endif / !GPDXL_CDXLScalarOpList_H
/ EOF
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