mirror of
https://github.com/FirebirdSQL/firebird.git
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162 lines
3.7 KiB
C++
162 lines
3.7 KiB
C++
/*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Adriano dos Santos Fernandes
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2009 Adriano dos Santos Fernandes <asfernandes@users.sourceforge.net>
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#include "firebird.h"
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#include "../jrd/common.h"
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#include "../jrd/jrd.h"
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#include "../jrd/req.h"
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#include "../jrd/cmp_proto.h"
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#include "../jrd/exe_proto.h"
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#include "RecordSource.h"
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using namespace Firebird;
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using namespace Jrd;
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// ------------------------------
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// Data access: window expression
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// ------------------------------
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WindowedStream::WindowedStream(CompilerScratch* csb, UCHAR stream,
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AggregatedStream* aggregate, RecordSource* next)
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: RecordStream(csb, stream), m_aggregate(aggregate), m_next(next)
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{
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fb_assert(m_aggregate && m_next);
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m_impure = CMP_impure(csb, sizeof(Impure));
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}
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void WindowedStream::open(thread_db* tdbb)
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{
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jrd_req* const request = tdbb->getRequest();
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Impure* const impure = (Impure*) ((UCHAR*) request + m_impure);
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impure->irsb_flags = irsb_open;
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m_aggregate->open(tdbb);
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m_aggregate->getRecord(tdbb);
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m_aggregate->close(tdbb);
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m_next->open(tdbb);
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}
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void WindowedStream::close(thread_db* tdbb)
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{
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jrd_req* const request = tdbb->getRequest();
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invalidateRecords(request);
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Impure* const impure = (Impure*) ((UCHAR*) request + m_impure);
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if (impure->irsb_flags & irsb_open)
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{
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impure->irsb_flags &= ~irsb_open;
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m_next->close(tdbb);
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}
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}
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bool WindowedStream::getRecord(thread_db* tdbb)
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{
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jrd_req* const request = tdbb->getRequest();
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Impure* const impure = (Impure*) ((UCHAR*) request + m_impure);
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if (!(impure->irsb_flags & irsb_open))
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{
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return false;
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}
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if (m_next->getRecord(tdbb))
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{
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jrd_nod* const node = m_aggregate->getAggregate();
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jrd_nod* const map = node->nod_arg[e_agg_map];
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jrd_nod* const* ptr = map->nod_arg;
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for (const jrd_nod* const* end = ptr + map->nod_count; ptr < end; ptr++)
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{
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jrd_nod* const from = (*ptr)->nod_arg[e_asgn_from];
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switch (from->nod_type)
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{
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case nod_agg_average:
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case nod_agg_average_distinct:
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case nod_agg_average2:
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case nod_agg_average_distinct2:
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case nod_agg_total:
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case nod_agg_total_distinct:
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case nod_agg_total2:
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case nod_agg_total_distinct2:
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case nod_agg_min:
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case nod_agg_min_indexed:
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case nod_agg_max:
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case nod_agg_max_indexed:
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case nod_agg_count:
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case nod_agg_count2:
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case nod_agg_count_distinct:
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case nod_agg_list:
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case nod_agg_list_distinct:
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break;
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default:
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EXE_assignment(tdbb, *ptr);
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break;
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}
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}
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return true;
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}
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return false;
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}
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bool WindowedStream::refetchRecord(thread_db* tdbb)
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{
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return m_next->refetchRecord(tdbb);
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}
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bool WindowedStream::lockRecord(thread_db* tdbb)
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{
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return m_next->lockRecord(tdbb);
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}
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void WindowedStream::dump(thread_db* tdbb, UCharBuffer& buffer)
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{
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buffer.add(isc_info_rsb_begin);
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buffer.add(isc_info_rsb_type);
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buffer.add(isc_info_rsb_window);
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m_aggregate->dump(tdbb, buffer);
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buffer.add(isc_info_rsb_end);
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}
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void WindowedStream::markRecursive()
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{
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m_aggregate->markRecursive();
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}
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void WindowedStream::invalidateRecords(jrd_req* request)
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{
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m_aggregate->invalidateRecords(request);
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}
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