greenplumn CDXLScalarFuncExpr 源码
greenplumn CDXLScalarFuncExpr 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarFuncExpr.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CDXLScalarFuncExpr.h
//
// @doc:
// Class for representing DXL scalar FuncExpr
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarFuncExpr_H
#define GPDXL_CDXLScalarFuncExpr_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarFuncExpr
//
// @doc:
// Class for representing DXL scalar FuncExpr
//
//---------------------------------------------------------------------------
class CDXLScalarFuncExpr : public CDXLScalar
{
private:
// catalog id of the function
IMDId *m_func_mdid;
// return type
IMDId *m_return_type_mdid;
const INT m_return_type_modifier;
// does the func return a set
BOOL m_returns_set;
public:
CDXLScalarFuncExpr(const CDXLScalarFuncExpr &) = delete;
// ctor
CDXLScalarFuncExpr(CMemoryPool *mp, IMDId *mdid_func,
IMDId *mdid_return_type, INT return_type_modifier,
BOOL returns_set);
//dtor
~CDXLScalarFuncExpr() override;
// ident accessors
Edxlopid GetDXLOperator() const override;
// name of the DXL operator
const CWStringConst *GetOpNameStr() const override;
// function id
IMDId *FuncMdId() const;
// return type
IMDId *ReturnTypeMdId() const;
INT TypeModifier() const;
// does function return a set
BOOL ReturnsSet() const;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLScalarFuncExpr *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarFuncExpr == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarFuncExpr *>(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 *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarFuncExpr_H
// EOF
相关信息
相关文章
greenplumn CDXLCtasStorageOptions 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony