greenplumn CDXLScalarRecheckCondFilter 源码
greenplumn CDXLScalarRecheckCondFilter 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarRecheckCondFilter.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarRecheckCondFilter.h
//
// @doc:
// Filter for rechecking an index condition on the operator upstream of the index scan
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarRecheckCondFilter_H
#define GPDXL_CDXLScalarRecheckCondFilter_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalarFilter.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLScalarRecheckCondFilter
//
// @doc:
// Filter for rechecking an index condition on the operator upstream of the bitmap index scan
//
//---------------------------------------------------------------------------
class CDXLScalarRecheckCondFilter : public CDXLScalarFilter
{
private:
public:
CDXLScalarRecheckCondFilter(CDXLScalarRecheckCondFilter &) = delete;
// ctor
explicit CDXLScalarRecheckCondFilter(CMemoryPool *mp) : CDXLScalarFilter(mp)
{
}
// operator identity
Edxlopid
GetDXLOperator() const override
{
return EdxlopScalarRecheckCondFilter;
}
// operator name
const CWStringConst *GetOpNameStr() const override;
// does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * //md_accessor
) const override
{
GPOS_ASSERT(!"Invalid function call for a container operator");
return false;
}
// conversion function
static CDXLScalarRecheckCondFilter *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarRecheckCondFilter == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarRecheckCondFilter *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarRecheckCondFilter_H
// EOF
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