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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