greenplumn CDXLScalarOneTimeFilter 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarOneTimeFilter.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2010 Greenplum, Inc.
/
/ @filename:
/ CDXLScalarOneTimeFilter.h
/
/ @doc:
/ Class for representing a scalar filter that is executed once inside DXL physical operators.
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarOneTimeFilter_H
#define GPDXL_CDXLScalarOneTimeFilter_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalarFilter.h"
namespace gpdxl
{
/---------------------------------------------------------------------------
/ @class:
/ CDXLScalarOneTimeFilter
/
/ @doc:
/ Class for representing DXL filter operators
/
/---------------------------------------------------------------------------
class CDXLScalarOneTimeFilter : public CDXLScalarFilter
{
private:
public:
CDXLScalarOneTimeFilter(CDXLScalarOneTimeFilter &) = delete;
/ ctor
explicit CDXLScalarOneTimeFilter(CMemoryPool *mp);
/ accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
/ conversion function
static CDXLScalarOneTimeFilter *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarOneTimeFilter == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarOneTimeFilter *>(dxl_op);
}
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *, const CDXLNode *) 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;
}
};
} / namespace gpdxl
#endif / !GPDXL_CDXLScalarOneTimeFilter_H
/ EOF
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码