greenplumn CParseHandlerLogicalSetOp 源码
greenplumn CParseHandlerLogicalSetOp 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerLogicalSetOp.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CParseHandlerLogicalSetOp.h
//
// @doc:
// Parse handler for parsing a logical set operator
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerLogicalSetOp_H
#define GPDXL_CParseHandlerLogicalSetOp_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLLogicalSetOp.h"
#include "naucrates/dxl/parser/CParseHandlerLogicalOp.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CParseHandlerLogicalSetOp
//
// @doc:
// Parse handler for parsing a logical set operator
//
//---------------------------------------------------------------------------
class CParseHandlerLogicalSetOp : public CParseHandlerLogicalOp
{
private:
// set operation type
EdxlSetOpType m_setop_type;
// array of input column id arrays
ULongPtr2dArray *m_input_colids_arrays;
// do the columns across inputs need to be casted
BOOL m_cast_across_input_req;
// return the set operation type
static EdxlSetOpType GetSetOpType(const XMLCh *const element_local_name);
// process the start of an element
void StartElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname, // element's qname
const Attributes &attr // element's attributes
) override;
// process the end of an element
void EndElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname // element's qname
) override;
public:
CParseHandlerLogicalSetOp(const CParseHandlerLogicalSetOp &) = delete;
// ctor
CParseHandlerLogicalSetOp(CMemoryPool *mp,
CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
// dtor
~CParseHandlerLogicalSetOp() override;
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerLogicalSetOp_H
// EOF
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