greenplumn CDXLScalarDMLAction 源码
greenplumn CDXLScalarDMLAction 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarDMLAction.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLScalarDMLAction.h
//
// @doc:
// Class for representing DXL DML action expressions
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarDMLAction_H
#define GPDXL_CDXLScalarDMLAction_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
//---------------------------------------------------------------------------
// @class:
// CDXLScalarDMLAction
//
// @doc:
// Class for representing DXL DML action expressions
//
//---------------------------------------------------------------------------
class CDXLScalarDMLAction : public CDXLScalar
{
private:
public:
CDXLScalarDMLAction(const CDXLScalarDMLAction &) = delete;
// ctor/dtor
explicit CDXLScalarDMLAction(CMemoryPool *mp);
~CDXLScalarDMLAction() override = default;
// ident accessors
Edxlopid GetDXLOperator() const override;
const CWStringConst *GetOpNameStr() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
// conversion function
static CDXLScalarDMLAction *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarDMLAction == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarDMLAction *>(dxl_op);
}
// 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 *node,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarDMLAction_H
// EOF
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