Java ExprNodeColumnDesc.getTabAlias Examples

Example #1

File: RexNodeConverter.java Project: Leolh/hive

  private InputCtx getInputCtx(ExprNodeColumnDesc col) throws SemanticException {
    InputCtx ctxLookingFor = null;

    if (inputCtxs.size() == 1) {
      ctxLookingFor = inputCtxs.get(0);
    } else {
      String tableAlias = col.getTabAlias();
      String colAlias = col.getColumn();
      int noInp = 0;
      for (InputCtx ic : inputCtxs) {
        if (tableAlias == null || ic.hiveRR.hasTableAlias(tableAlias)) {
          if (ic.hiveRR.getPosition(colAlias) >= 0) {
            ctxLookingFor = ic;
            noInp++;
          }
        }
      }

      if (noInp > 1) throw new RuntimeException("Ambigous column mapping");
    }

    return ctxLookingFor;
  }