Example #1
0
 public Cursor find(Session session, SearchRow first, SearchRow last) {
   if (recursive) {
     if (view.getRecursiveResult() != null) {
       ResultInterface r = view.getRecursiveResult();
       r.reset();
       return new ViewCursor(table, r);
     }
     if (query == null) {
       query = (Query) createSession.prepare(querySQL, true);
       planSQL = query.getPlanSQL();
     }
     if (!(query instanceof SelectUnion)) {
       throw DbException.get(ErrorCode.SYNTAX_ERROR_2, "recursive queries without UNION ALL");
     }
     SelectUnion union = (SelectUnion) query;
     if (union.getUnionType() != SelectUnion.UNION_ALL) {
       throw DbException.get(ErrorCode.SYNTAX_ERROR_2, "recursive queries without UNION ALL");
     }
     Query left = union.getLeft();
     ResultInterface r = left.query(0);
     LocalResult result = union.getEmptyResult();
     while (r.next()) {
       result.addRow(r.currentRow());
     }
     Query right = union.getRight();
     r.reset();
     view.setRecursiveResult(r);
     while (true) {
       r = right.query(0);
       if (r.getRowCount() == 0) {
         break;
       }
       while (r.next()) {
         result.addRow(r.currentRow());
       }
       r.reset();
       view.setRecursiveResult(r);
     }
     return new ViewCursor(table, result);
   }
   ArrayList<Parameter> paramList = query.getParameters();
   for (int i = 0; originalParameters != null && i < originalParameters.size(); i++) {
     Parameter orig = originalParameters.get(i);
     int idx = orig.getIndex();
     Value value = orig.getValue(session);
     setParameter(paramList, idx, value);
   }
   int len;
   if (first != null) {
     len = first.getColumnCount();
   } else if (last != null) {
     len = last.getColumnCount();
   } else {
     len = 0;
   }
   int idx = originalParameters == null ? 0 : originalParameters.size();
   idx += view.getParameterOffset();
   for (int i = 0; i < len; i++) {
     if (first != null) {
       Value v = first.getValue(i);
       if (v != null) {
         int x = idx++;
         setParameter(paramList, x, v);
       }
     }
     // for equality, only one parameter is used (first == last)
     if (last != null && indexMasks[i] != IndexCondition.EQUALITY) {
       Value v = last.getValue(i);
       if (v != null) {
         int x = idx++;
         setParameter(paramList, x, v);
       }
     }
   }
   ResultInterface result = query.query(0);
   return new ViewCursor(table, result);
 }