greenplumn CDXLScalarIdent 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarIdent.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2010 Greenplum, Inc.
/
/ @filename:
/ CDXLScalarIdent.h
/
/ @doc:
/ Class for representing DXL scalar identifier operators.
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarIdent_H
#define GPDXL_CDXLScalarIdent_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLColRef.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
/---------------------------------------------------------------------------
/ @class:
/ CDXLScalarIdent
/
/ @doc:
/ Class for representing DXL scalar identifier operators.
/
/---------------------------------------------------------------------------
class CDXLScalarIdent : public CDXLScalar
{
private:
/ column reference
CDXLColRef *m_dxl_colref;
public:
CDXLScalarIdent(CDXLScalarIdent &) = delete;
/ ctor/dtor
CDXLScalarIdent(CMemoryPool *, CDXLColRef *);
~CDXLScalarIdent() override;
/ ident accessors
Edxlopid GetDXLOperator() const override;
/ name of the operator
const CWStringConst *GetOpNameStr() const override;
/ accessors
const CDXLColRef *GetDXLColRef() const;
IMDId *MdidType() const;
INT TypeModifier() const;
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
/ conversion function
static CDXLScalarIdent *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarIdent == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarIdent *>(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
void AssertValid(const CDXLNode *node,
BOOL validate_children) const override;
#endif / GPOS_DEBUG
};
} / namespace gpdxl
#endif / !GPDXL_CDXLScalarIdent_H
/ EOF
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码