greenplumn CDXLScalarPartListNullTest 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarPartListNullTest.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ Class for representing DXL Part list null test expressions
/ These expressions indicate whether the list values of a part
/ contain NULL value or not
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarPartListNullTest_H
#define GPDXL_CDXLScalarPartListNullTest_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
class CDXLScalarPartListNullTest : public CDXLScalar
{
private:
/ partitioning level
ULONG m_partitioning_level;
/ Null Test type (true for 'is null', false for 'is not null')
BOOL m_is_null;
public:
CDXLScalarPartListNullTest(const CDXLScalarPartListNullTest &) = delete;
/ ctor
CDXLScalarPartListNullTest(CMemoryPool *mp, ULONG partitioning_level,
BOOL is_null);
/ operator type
Edxlopid GetDXLOperator() const override;
/ operator name
const CWStringConst *GetOpNameStr() const override;
/ partitioning level
ULONG GetPartitioningLevel() const;
/ Null Test type (true for 'is null', false for 'is not null')
BOOL IsNull() const;
/ 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;
#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 CDXLScalarPartListNullTest *Cast(CDXLOperator *dxl_op);
};
} / namespace gpdxl
#endif / !GPDXL_CDXLScalarPartListNullTest_H
/ EOF
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