Examples of org.apache.derby.impl.sql.GenericPreparedStatement$RowCountStatistics

org.apache.derby.impl.sql.GenericPreparedStatement
This class holds information about stale plan check interval, execution count and row count statistics for a GenericPreparedStatement. The fields and methods should ideally live in GenericPreparedStatement, not in a separate class. However, triggers clone the GPS on each execution, which means the statistics would be reset on each execution if they lived directly inside GPS. Instead, keep the statistics in an object that can be shared between multiple GPS instances when they are cloned.

    Cacheable cachedItem = statementCache.find(statement);


    CachedStatement cs = (CachedStatement) cachedItem;




    GenericPreparedStatement ps = cs.getPreparedStatement();


    synchronized (ps) {
      if (ps.upToDate()) {
        GeneratedClass ac = ps.getActivationClass();


        // Check to see if the statement was prepared before some change
        // in the class loading set. If this is the case then force it to be invalid
        int currentClasses =
            getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


        if (ac.getClassLoaderVersion() != currentClasses) {
          ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
        }


        // note that the PreparedStatement is not kept in the cache. This is because
        // having items kept in the cache that ultimately are held onto by
        // user code is impossible to manage. E.g. an open ResultSet would hold onto

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        Cacheable cachedItem = statementCache.find(statement);


        CachedStatement cs = (CachedStatement) cachedItem;




        GenericPreparedStatement ps = cs.getPreparedStatement();


        synchronized (ps) {
            if (ps.upToDate()) {
                GeneratedClass ac = ps.getActivationClass();


                // Check to see if the statement was prepared before some change
                // in the class loading set. If this is the case then force it to be invalid
                int currentClasses =
                        getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


                if (ac.getClassLoaderVersion() != currentClasses) {
                    ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
                }


                // note that the PreparedStatement is not kept in the cache. This is because
                // having items kept in the cache that ultimately are held onto by
                // user code is impossible to manage. E.g. an open ResultSet would hold onto

View Full Code Here

    if (statementCache != null) {
      final Collection values = statementCache.values();
      data = new Vector(values.size());
      for (Iterator i = values.iterator(); i.hasNext(); ) {
        final CachedStatement cs = (CachedStatement) i.next();
        final GenericPreparedStatement ps =
          (GenericPreparedStatement) cs.getPreparedStatement();
        data.add(ps);
      }
    }
  }

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          double optimizerEstimatedRowCount,
          double optimizerEstimatedCost) 
    throws StandardException
  {
    super(a, resultSetNumber, optimizerEstimatedRowCount, optimizerEstimatedCost);
    final GenericPreparedStatement gp =
      (GenericPreparedStatement)a.getPreparedStatement();
    final Object[] saved = gp.getSavedObjects();


    scoci = (StaticCompiledOpenConglomInfo)saved[scociItem];
    TransactionController tc = activation.getTransactionController();
    dcoci = tc.getDynamicCompiledConglomInfo(conglomId);
        this.source = source;

View Full Code Here




        CachedItem ci = (CachedItem) e.nextElement();
        CachedStatement cs = (CachedStatement) ci.getEntry();


        GenericPreparedStatement ps = (GenericPreparedStatement) cs.getPreparedStatement();


        data.addElement(ps);
      }
    }

View Full Code Here

  /**
  */
  public Cacheable setIdentity(Object key) {


    identity = key;
    ps = new GenericPreparedStatement((GenericStatement) key);
    ps.setCacheHolder(this);


    return this;
  }

View Full Code Here

    Cacheable cachedItem = statementCache.find(statement);


    CachedStatement cs = (CachedStatement) cachedItem;




    GenericPreparedStatement ps = cs.getPreparedStatement();


    synchronized (ps) {
      if (ps.upToDate()) {
        GeneratedClass ac = ps.getActivationClass();


        // Check to see if the statement was prepared before some change
        // in the class loading set. If this is the case then force it to be invalid
        int currentClasses =
            getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


        if (ac.getClassLoaderVersion() != currentClasses) {
          ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
        }


        // note that the PreparedStatement is not kept in the cache. This is because
        // having items kept in the cache that ultimately are held onto by
        // user code is impossible to manage. E.g. an open ResultSet would hold onto

View Full Code Here

    Cacheable cachedItem = statementCache.find(statement);


    CachedStatement cs = (CachedStatement) cachedItem;




    GenericPreparedStatement ps = cs.getPreparedStatement();


    synchronized (ps) {
      if (ps.upToDate()) {
        GeneratedClass ac = ps.getActivationClass();


        // Check to see if the statement was prepared before some change
        // in the class loading set. If this is the case then force it to be invalid
        int currentClasses =
            getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


        if (ac.getClassLoaderVersion() != currentClasses) {
          ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
        }


        // note that the PreparedStatement is not kept in the cache. This is because
        // having items kept in the cache that ultimately are held onto by
        // user code is impossible to manage. E.g. an open ResultSet would hold onto

View Full Code Here

    Cacheable cachedItem = statementCache.find(statement);


    CachedStatement cs = (CachedStatement) cachedItem;




    GenericPreparedStatement ps = cs.getPreparedStatement();


    synchronized (ps) {
      if (ps.upToDate()) {
        GeneratedClass ac = ps.getActivationClass();


        // Check to see if the statement was prepared before some change
        // in the class loading set. If this is the case then force it to be invalid
        int currentClasses =
            getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


        if (ac.getClassLoaderVersion() != currentClasses) {
          ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
        }


        // note that the PreparedStatement is not kept in the cache. This is because
        // having items kept in the cache that ultimately are held onto by
        // user code is impossible to manage. E.g. an open ResultSet would hold onto

View Full Code Here

    Cacheable cachedItem = statementCache.find(statement);


    CachedStatement cs = (CachedStatement) cachedItem;




    GenericPreparedStatement ps = cs.getPreparedStatement();


    synchronized (ps) {
      if (ps.upToDate()) {
        GeneratedClass ac = ps.getActivationClass();


        // Check to see if the statement was prepared before some change
        // in the class loading set. If this is the case then force it to be invalid
        int currentClasses =
            getLanguageConnectionFactory().getClassFactory().getClassLoaderVersion();


        if (ac.getClassLoaderVersion() != currentClasses) {
          ps.makeInvalid(DependencyManager.INTERNAL_RECOMPILE_REQUEST, this);
        }


        // note that the PreparedStatement is not kept in the cache. This is because
        // having items kept in the cache that ultimately are held onto by
        // user code is impossible to manage. E.g. an open ResultSet would hold onto

View Full Code Here

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