Example #1
0
 /** Create the <TT>IDataSet</TT> to be displayed in this tab. */
 protected IDataSet createDataSet() throws DataSetException {
   final SQLConnection conn = getSession().getSQLConnection();
   try {
     final ResultSet rs = conn.getSQLMetaData().getExportedKeys(getTableInfo());
     final ResultSetDataSet rsds = new ResultSetDataSet();
     rsds.setResultSet(rs, getSession().getProperties().getLargeResultSetObjectInfo());
     return rsds;
   } catch (SQLException ex) {
     throw new DataSetException(ex);
   }
 }
    @Override
    public void sqlResultSetAvailable(
        ResultSetWrapper rs, final SQLExecutionInfo info, final IDataSetUpdateableTableModel model)
        throws DataSetException {

      final ResultSetDataSet rsds = new ResultSetDataSet();
      rsds.setResultSet(rs.getResultSet(), _dialectType);

      GUIUtils.processOnSwingEventThread(
          new Runnable() {
            public void run() {
              updateExplainTab(info, model, rsds);
            }
          });
    }
Example #3
0
  /** Create the <TT>IDataSet</TT> to be displayed in this tab. */
  protected IDataSet createDataSet() throws DataSetException {
    final ISession session = getSession();
    final ISQLConnection conn = session.getSQLConnection();
    ISQLDatabaseMetaData md = session.getMetaData();

    try {
      final Statement stmt = conn.createStatement();
      try {
        final SessionProperties props = session.getProperties();
        if (props.getContentsLimitRows()) {
          try {
            stmt.setMaxRows(props.getContentsNbrRowsToShow());
          } catch (Exception ex) {
            s_log.error("Error on Statement.setMaxRows()", ex);
          }
        }
        final ITableInfo ti = getTableInfo();

        /**
         * When the SessionProperties are set to read-only (either table or text) but the user has
         * selected "Make Editable" on the Popup menu, we want to limit the edit capability to only
         * that table, and only for as long as the user is looking at that one table. When the user
         * switches away to another table, that new table should not be editable.
         */
        final String currentTableName = ti.getQualifiedName();
        if (!currentTableName.equals(previousTableName)) {
          previousTableName = currentTableName; // needed to prevent an infinite loop
          _dataSetUpdateableTableModel.setEditModeForced(false);

          /**
           * Tell the GUI to rebuild itself. Unfortunately, this has the side effect of calling this
           * same function another time. The second call does not seem to be a problem, but we need
           * to have reset the previousTableName before makeing this call or we will be in an
           * infinite loop.
           */
          // props.forceTableContentsOutputClassNameChange();
        }

        /**
         * If the table has a pseudo-column that is the best unique identifier for the rows (like
         * Oracle's rowid), then we want to include that field in the query so that it will be
         * available if the user wants to edit the data later.
         */
        String pseudoColumn = "";

        try {
          BestRowIdentifier[] rowIDs = md.getBestRowIdentifier(ti);
          for (int i = 0; i < rowIDs.length; ++i) {
            short pseudo = rowIDs[i].getPseudoColumn();
            if (pseudo == DatabaseMetaData.bestRowPseudo) {
              pseudoColumn = " ," + rowIDs[i].getColumnName();
              break;
            }
          }
        }

        // Some DBMS's (EG Think SQL) throw an exception on a call to
        // getBestRowIdentifier.
        catch (Throwable th) {
          if (s_log.isDebugEnabled()) {
            s_log.debug("getBestRowIdentifier not supported for table " + currentTableName, th);
          }
        }

        // TODO: - Col - Add method to Databasemetadata that returns array
        // of objects for getBestRowIdentifier. For PostgreSQL put this kludge in
        // the new function. THis way all the kludges are kept in one place.
        //
        // KLUDGE!!!!!!
        //
        // For some DBs (e.g. PostgreSQL) there is actually a pseudo-column
        // providing the rowId, but the getBestRowIdentifier function is not
        // implemented.  This kludge hardcodes the knowledge that specific
        // DBs use a specific pseudo-column.  Additionally, as of pg 8.1,
        // you must create the table using "WITH OID" appended to the create
        // statement.  Otherwise, OID column is not available by default.
        //
        if (pseudoColumn.length() == 0) {
          if (DialectFactory.isPostgreSQL(md)) {
            pseudoColumn = ", oid";
          }
          if (DialectFactory.isOracle(md)) {
            pseudoColumn = ", ROWID";
          }
        }

        ResultSet rs = null;
        try {
          // Note. Some DBMSs such as Oracle do not allow:
          // "select *, rowid from table"
          // You cannot have any column name in the columns clause
          // if you have * in there. Aliasing the table name seems to
          // be the best way to get around the problem.
          final StringBuffer buf = new StringBuffer();
          buf.append("select tbl.*")
              .append(pseudoColumn)
              .append(" from ")
              .append(ti.getQualifiedName())
              .append(" tbl");

          String clause =
              _sqlFilterClauses.get(WhereClausePanel.getClauseIdentifier(), ti.getQualifiedName());
          if ((clause != null) && (clause.length() > 0)) {
            buf.append(" where ").append(clause);
          }
          clause =
              _sqlFilterClauses.get(
                  OrderByClausePanel.getClauseIdentifier(), ti.getQualifiedName());
          if ((clause != null) && (clause.length() > 0)) {
            buf.append(" order by ").append(clause);
          }

          if (s_log.isDebugEnabled()) {
            s_log.debug("createDataSet running SQL: " + buf.toString());
          }

          showWaitDialog(stmt);

          rs = stmt.executeQuery(buf.toString());

        } catch (SQLException ex) {
          if (s_log.isDebugEnabled()) {
            s_log.debug("createDataSet: exception from pseudocolumn query - " + ex, ex);
          }
          // We assume here that if the pseudoColumn was used in the query,
          // then it was likely to have caused the SQLException.  If not,
          // (length == 0), then retrying the query won't help - just throw
          // the exception.
          if (pseudoColumn.length() == 0) {
            throw ex;
          }
          // pseudocolumn query failed, so reset it.  Otherwise, we'll
          // mistake the last column for a pseudocolumn and make it
          // uneditable
          pseudoColumn = "";

          // Some tables have pseudo column primary keys and others
          // do not.  JDBC on some DBMSs does not handle pseudo
          // columns 'correctly'.  Also, getTables returns 'views' as
          // well as tables, so the thing we are looking at might not
          // be a table. (JDBC does not give a simple way to
          // determine what we are looking at since the type of
          // object is described in a DBMS-specific encoding.)  For
          // these reasons, rather than testing for all these
          // conditions, we just try using the pseudo column info to
          // get the table data, and if that fails, we try to get the
          // table data without using the pseudo column.
          // TODO: Should we change the mode from editable to
          // non-editable?
          final StringBuffer buf = new StringBuffer();
          buf.append("select *").append(" from ").append(ti.getQualifiedName()).append(" tbl");

          String clause =
              _sqlFilterClauses.get(WhereClausePanel.getClauseIdentifier(), ti.getQualifiedName());
          if ((clause != null) && (clause.length() > 0)) {
            buf.append(" where ").append(clause);
          }
          clause =
              _sqlFilterClauses.get(
                  OrderByClausePanel.getClauseIdentifier(), ti.getQualifiedName());
          if ((clause != null) && (clause.length() > 0)) {
            buf.append(" order by ").append(clause);
          }

          rs = stmt.executeQuery(buf.toString());
        }

        final ResultSetDataSet rsds = new ResultSetDataSet();

        // to allow the fw to save and reload user options related to
        // specific columns, we construct a unique name for the table
        // so the column can be associcated with only that table.
        // Some drivers do not provide the catalog or schema info, so
        // those parts of the name will end up as null.  That's ok since
        // this string is never viewed by the user and is just used to
        // distinguish this table from other tables in the DB.
        // We also include the URL used to connect to the DB so that
        // the same table/DB on different machines is treated differently.
        rsds.setContentsTabResultSet(
            rs, _dataSetUpdateableTableModel.getFullTableName(), DialectFactory.getDialectType(md));
        if (rs != null) {
          try {
            rs.close();
          } catch (SQLException e) {
          }
        }
        // KLUDGE:
        // We want some info about the columns to be available for validating the
        // user input during cell editing operations.  Ideally we would get that
        // info inside the ResultSetDataSet class during the creation of the
        // columnDefinition objects by using various functions in ResultSetMetaData
        // such as isNullable(idx).  Unfortunately, in at least some DBMSs (e.g.
        // Postgres, HSDB) the results of those calls are not the same (and are less accurate
        // than) the SQLMetaData.getColumns() call used in ColumnsTab to get the column info.
        // Even more unfortunate is the fact that the set of attributes reported on by the two
        // calls is not the same, with the ResultSetMetadata listing things not provided by
        // getColumns.  Most of the data provided by the ResultSetMetaData calls is correct.
        // However, the nullable/not-nullable property is not set correctly in at least two
        // DBMSs, while it is correct for those DBMSs in the getColumns() info.  Therefore,
        // we collect the collumn nullability information from getColumns() and pass that
        // info to the ResultSet to override what it got from the ResultSetMetaData.
        TableColumnInfo[] columnInfos = md.getColumnInfo(getTableInfo());
        final ColumnDisplayDefinition[] colDefs =
            rsds.getDataSetDefinition().getColumnDefinitions();

        // get the nullability information and pass it into the ResultSet
        // Unfortunately, not all DBMSs provide the column number in object 17 as stated in the
        // SQL documentation, so we have to guess that the result set is in column order
        for (int i = 0; i < columnInfos.length; i++) {
          boolean isNullable = true;
          TableColumnInfo info = columnInfos[i];
          if (info.isNullAllowed() == DatabaseMetaData.columnNoNulls) {
            isNullable = false;
          }
          if (i < colDefs.length) {
            colDefs[i].setIsNullable(isNullable);
          }
        }

        // ?? remember which column is the rowID (if any) so we can
        // ?? prevent editing on it
        if (pseudoColumn.length() > 0) {
          _dataSetUpdateableTableModel.setRowIDCol(rsds.getColumnCount() - 1);
        }

        return rsds;
      } finally {
        SQLUtilities.closeStatement(stmt);
      }

    } catch (SQLException ex) {
      throw new DataSetException(ex);
    } finally {
      disposeWaitDialog();
    }
  }