greenplumn CMappingColIdVarPlStmt 源码
greenplumn CMappingColIdVarPlStmt 代码
文件路径：/src/include/gpopt/translate/CMappingColIdVarPlStmt.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CMappingColIdVarPlStmt.h
//
// @doc:
// Class defining the functions that provide the mapping between Var, Param
// and variables of Sub-query to CDXLNode during Query->DXL translation
//
// @test:
//
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CMappingColIdVarPlStmt_H
#define GPDXL_CMappingColIdVarPlStmt_H
#include "gpos/base.h"
#include "gpos/common/CDynamicPtrArray.h"
#include "gpos/common/CHashMap.h"
#include "gpopt/translate/CDXLTranslateContext.h"
#include "gpopt/translate/CMappingColIdVar.h"
//fwd decl
struct Var;
struct Plan;
namespace gpdxl
{
// fwd decl
class CDXLTranslateContextBaseTable;
class CContextDXLToPlStmt;
//---------------------------------------------------------------------------
// @class:
// CMappingColIdVarPlStmt
//
// @doc:
// Class defining functions that provide the mapping between Var, Param
// and variables of Sub-query to CDXLNode during Query->DXL translation
//
//---------------------------------------------------------------------------
class CMappingColIdVarPlStmt : public CMappingColIdVar
{
private:
const CDXLTranslateContextBaseTable *m_base_table_context;
// the array of translator context (one for each child of the DXL operator)
CDXLTranslationContextArray *m_child_contexts;
CDXLTranslateContext *m_output_context;
// translator context used to translate initplan and subplans associated
// with a param node
CContextDXLToPlStmt *m_dxl_to_plstmt_context;
public:
CMappingColIdVarPlStmt(
CMemoryPool *mp,
const CDXLTranslateContextBaseTable *base_table_context,
CDXLTranslationContextArray *child_contexts,
CDXLTranslateContext *output_context,
CContextDXLToPlStmt *dxl_to_plstmt_context);
// translate DXL ScalarIdent node into GPDB Var node
Var *VarFromDXLNodeScId(const CDXLScalarIdent *dxlop) override;
// translate DXL ScalarIdent node into GPDB Param node
Param *ParamFromDXLNodeScId(const CDXLScalarIdent *dxlop);
// get the output translator context
CDXLTranslateContext *GetOutputContext();
// return the context of the DXL->PlStmt translation
CContextDXLToPlStmt *GetDXLToPlStmtContext();
};
} // namespace gpdxl
#endif // GPDXL_CMappingColIdVarPlStmt_H
// EOF
相关信息
相关文章
greenplumn CContextDXLToPlStmt 源码
greenplumn CContextQueryToDXL 源码
greenplumn CDXLTranslateContext 源码
greenplumn CDXLTranslateContextBaseTable 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦