greenplumn CDXLLogicalTVF 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLLogicalTVF.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CDXLLogicalTVF.h
/
/ @doc:
/ Class for representing table-valued functions
/---------------------------------------------------------------------------
#ifndef GPDXL_CDXLLogicalTVF_H
#define GPDXL_CDXLLogicalTVF_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLColDescr.h"
#include "naucrates/dxl/operators/CDXLLogical.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
/---------------------------------------------------------------------------
/ @class:
/ CDXLLogicalTVF
/
/ @doc:
/ Class for representing table-valued functions
/
/---------------------------------------------------------------------------
class CDXLLogicalTVF : public CDXLLogical
{
private:
/ catalog id of the function
IMDId *m_func_mdid;
/ return type
IMDId *m_return_type_mdid;
/ function name
CMDName *m_mdname;
/ list of column descriptors
CDXLColDescrArray *m_dxl_col_descr_array;
public:
CDXLLogicalTVF(const CDXLLogicalTVF &) = delete;
/ ctor/dtor
CDXLLogicalTVF(CMemoryPool *mp, IMDId *mdid_func, IMDId *mdid_return_type,
CMDName *mdname, CDXLColDescrArray *pdrgdxlcd);
~CDXLLogicalTVF() override;
/ get operator type
Edxlopid GetDXLOperator() const override;
/ get operator name
const CWStringConst *GetOpNameStr() const override;
/ get function name
CMDName *
MdName() const
{
return m_mdname;
}
/ get function id
IMDId *
FuncMdId() const
{
return m_func_mdid;
}
/ get return type
IMDId *
ReturnTypeMdId() const
{
return m_return_type_mdid;
}
/ get number of output columns
ULONG Arity() const;
/ return the array of column descriptors
const CDXLColDescrArray *
GetDXLColumnDescrArray() const
{
return m_dxl_col_descr_array;
}
/ get the column descriptor at the given position
const CDXLColDescr *GetColumnDescrAt(ULONG ul) const;
/ check if given column is defined by operator
BOOL IsColDefined(ULONG colid) const override;
/ serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *node) const override;
/ conversion function
static CDXLLogicalTVF *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopLogicalTVF == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLLogicalTVF *>(dxl_op);
}
#ifdef GPOS_DEBUG
/ checks whether the operator has valid structure, i.e. number and
/ types of child nodes
void AssertValid(const CDXLNode *, BOOL validate_children) const override;
#endif / GPOS_DEBUG
};
} / namespace gpdxl
#endif / !GPDXL_CDXLLogicalTVF_H
/ EOF
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