greenplumn CDXLScalarSubqueryAll 源码
greenplumn CDXLScalarSubqueryAll 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarSubqueryAll.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC, Corp.
//
// @filename:
// CDXLScalarSubqueryAll.h
//
// @doc:
// Class for representing ALL subqueries
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarSubqueryAll_H
#define GPDXL_CDXLScalarSubqueryAll_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLScalarSubqueryQuantified.h"
#include "naucrates/md/CMDName.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarSubqueryAll
//
// @doc:
// Class for representing ALL subqueries
//
//---------------------------------------------------------------------------
class CDXLScalarSubqueryAll : public CDXLScalarSubqueryQuantified
{
private:
public:
CDXLScalarSubqueryAll(CDXLScalarSubqueryAll &) = delete;
// ctor
CDXLScalarSubqueryAll(CMemoryPool *mp, IMDId *scalar_op_mdid,
CMDName *mdname, ULONG colid);
// ident accessors
Edxlopid GetDXLOperator() const override;
// name of the operator
const CWStringConst *GetOpNameStr() const override;
// conversion function
static CDXLScalarSubqueryAll *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarSubqueryAll == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarSubqueryAll *>(dxl_op);
}
// does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * //md_accessor
) const override
{
return true;
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarSubqueryAll_H
// EOF
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