greenplumn CDXLScalarBooleanTest 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarBooleanTest.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ CDXLScalarBooleanTest.h
/
/ @doc:
/ Class for representing DXL BooleanTest
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarBooleanTest_H
#define GPDXL_CDXLScalarBooleanTest_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
using namespace gpos;
enum EdxlBooleanTestType
{
EdxlbooleantestIsTrue,
EdxlbooleantestIsNotTrue,
EdxlbooleantestIsFalse,
EdxlbooleantestIsNotFalse,
EdxlbooleantestIsUnknown,
EdxlbooleantestIsNotUnknown,
EdxlbooleantestSentinel
};
/---------------------------------------------------------------------------
/ @class:
/ CDXLScalarBooleanTest
/
/ @doc:
/ Class for representing DXL BooleanTest
/
/---------------------------------------------------------------------------
class CDXLScalarBooleanTest : public CDXLScalar
{
private:
/ operator type
const EdxlBooleanTestType m_dxl_bool_test_type;
/ name of the DXL operator name
const CWStringConst *GetOpNameStr() const override;
public:
CDXLScalarBooleanTest(const CDXLScalarBooleanTest &) = delete;
/ ctor/dtor
CDXLScalarBooleanTest(CMemoryPool *mp,
const EdxlBooleanTestType dxl_bool_type);
/ ident accessors
Edxlopid GetDXLOperator() const override;
/ BooleanTest operator type
EdxlBooleanTestType GetDxlBoolTypeStr() const;
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
/ conversion function
static CDXLScalarBooleanTest *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarBooleanTest == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarBooleanTest *>(dxl_op);
}
/ does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * /md_accessor
) const override
{
return true;
}
#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
};
} / namespace gpdxl
#endif / !GPDXL_CDXLScalarBooleanTest_H
/ EOF
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