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94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#include <unistd.h>
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#include <string>
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#include <memory>
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using namespace std;
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#include <boost/thread/mutex.hpp>
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#include <boost/scoped_ptr.hpp>
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using namespace boost;
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#include "cseputils.h"
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#include "parsequery.h"
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#include "calpontselectexecutionplan.h"
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#include "simplecolumn.h"
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#include "simplefilter.h"
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#include "constantcolumn.h"
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#include "calpontsystemcatalog.h"
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#include "sessionmanager.h"
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using namespace execplan;
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#include "brmtypes.h"
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using namespace BRM;
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extern int qfeparse();
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extern int qfedebug;
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struct yy_buffer_state;
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extern yy_buffer_state* qfe_scan_string(const char*);
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extern void qfe_delete_buffer(yy_buffer_state*);
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extern CalpontSelectExecutionPlan* ParserCSEP;
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extern boost::shared_ptr<CalpontSystemCatalog> ParserCSC;
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namespace
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{
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mutex ParserMutex;
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} //anon namespace
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namespace qfe
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{
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extern string DefaultSchema;
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CalpontSelectExecutionPlan* parseQuery(const string& query, const uint32_t sid)
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{
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//We're going to make parsing the query single-threaded for now. This makes it a lot
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// easier to interface with the parser and doesn;t materially affect overall query
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// performance (I think)
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mutex::scoped_lock lk(ParserMutex);
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boost::shared_ptr<CalpontSystemCatalog> csc = CalpontSystemCatalog::makeCalpontSystemCatalog(sid);
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CalpontSelectExecutionPlan* csep=0;
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csep = new CalpontSelectExecutionPlan();
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//we use an auto_ptr here with some trepidation. We only want auto delete on an execption.
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//If the parseing and plan build succeed, we want the ptr to stay around. boost::scoped_ptr<>
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//doesn't have an API to release ownership, so we use auto_ptr...
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auto_ptr<CalpontSelectExecutionPlan> scsep(csep);
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yy_buffer_state* ybs=0;
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ybs = qfe_scan_string(query.c_str());
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if (ybs != 0)
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{
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ParserCSEP = csep;
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ParserCSC = csc;
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if (qfeparse() != 0)
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throw runtime_error("syntax error");
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qfe_delete_buffer(ybs);
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}
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else
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throw runtime_error("Internal parser memory error");
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csep->data(query);
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SessionManager sm;
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TxnID txnID;
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txnID = sm.getTxnID(sid);
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if (!txnID.valid)
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{
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txnID.id = 0;
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txnID.valid = true;
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}
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QueryContext verID;
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verID = sm.verID();
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csep->txnID(txnID.id);
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csep->verID(verID);
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csep->sessionID(sid);
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//cout << *csep << endl;
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scsep.release();
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return csep;
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}
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}
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