Examples of org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc

org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc
Describes a GenericFunc node.

      while (joinKeys.size() > 0) {
        ExprNodeDesc node = joinKeys.remove(0);
        if (node instanceof ExprNodeColumnDesc) {
          joinCols.addAll(node.getCols());
        } else if (node instanceof ExprNodeGenericFuncDesc) {
          ExprNodeGenericFuncDesc udfNode = ((ExprNodeGenericFuncDesc) node);
          GenericUDF udf = udfNode.getGenericUDF();
          if (!FunctionRegistry.isDeterministic(udf)) {
            return false;
          }
          joinKeys.addAll(0, udfNode.getChildExprs());
        }
      }


      Table tbl = topToTable.get(tso);
      if (tbl.isPartitioned()) {

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                  ErrorMsg.INVALID_ARRAYINDEX_CONSTANT.getMsg()));
          }


          // Calculate TypeInfo
          TypeInfo t = ((ListTypeInfo) myt).getListElementTypeInfo();
          desc = new ExprNodeGenericFuncDesc(t, FunctionRegistry
              .getGenericUDFForIndex(), children);
        } else if (myt.getCategory() == Category.MAP) {
          // Only allow constant map key for now
          if (!(children.get(1) instanceof ExprNodeConstantDesc)) {
            throw new SemanticException(SemanticAnalyzer.generateErrorMessage(
                  expr,
                  ErrorMsg.INVALID_MAPINDEX_CONSTANT.getMsg()));
          }
          if (!(((ExprNodeConstantDesc) children.get(1)).getTypeInfo()
              .equals(((MapTypeInfo) myt).getMapKeyTypeInfo()))) {
            throw new SemanticException(ErrorMsg.INVALID_MAPINDEX_TYPE
                .getMsg(expr));
          }
          // Calculate TypeInfo
          TypeInfo t = ((MapTypeInfo) myt).getMapValueTypeInfo();
          desc = new ExprNodeGenericFuncDesc(t, FunctionRegistry
              .getGenericUDFForIndex(), children);
        } else {
          throw new SemanticException(ErrorMsg.NON_COLLECTION_TYPE.getMsg(expr,
              myt.getTypeName()));
        }

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    for (Map.Entry<Byte, List<ExprNodeDesc>> entry : filterMap.entrySet()) {
      Byte srcAlias = entry.getKey();
      List<ExprNodeDesc> columnDescList = entry.getValue();


      for (ExprNodeDesc nodeExpr : columnDescList) {
        ExprNodeGenericFuncDesc funcDesc = (ExprNodeGenericFuncDesc) nodeExpr;
        for (ExprNodeDesc childDesc : funcDesc.getChildExprs()) {
          if (!(childDesc instanceof ExprNodeColumnDesc)) {
            continue;
          }
          ExprNodeColumnDesc columnDesc = (ExprNodeColumnDesc) childDesc;
          // reset columns

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   */
  private static Class<? extends GenericUDF> getGenericUDFClassFromExprDesc(ExprNodeDesc desc) {
    if (!(desc instanceof ExprNodeGenericFuncDesc)) {
      return null;
    }
    ExprNodeGenericFuncDesc genericFuncDesc = (ExprNodeGenericFuncDesc) desc;
    return genericFuncDesc.getGenericUDF().getClass();
  }

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   */
  private static Class<? extends UDF> getUDFClassFromExprDesc(ExprNodeDesc desc) {
    if (!(desc instanceof ExprNodeGenericFuncDesc)) {
      return null;
    }
    ExprNodeGenericFuncDesc genericFuncDesc = (ExprNodeGenericFuncDesc) desc;
    if (!(genericFuncDesc.getGenericUDF() instanceof GenericUDFBridge)) {
      return null;
    }
    GenericUDFBridge bridge = (GenericUDFBridge) (genericFuncDesc
        .getGenericUDF());
    return bridge.getUdfClass();
  }

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        assert(false); // cannot find the partition column!
     } else {
       return false;
     }
    } else if (expr instanceof ExprNodeGenericFuncDesc) {
      ExprNodeGenericFuncDesc funcDesc = (ExprNodeGenericFuncDesc) expr;
      GenericUDF func = funcDesc.getGenericUDF();
      if (!supportedJDOFuncs(func)) {
        return false;
      }
      List<ExprNodeDesc> children = funcDesc.getChildExprs();
      for (ExprNodeDesc child: children) {
        if (!checkJDOPushDown(tab, child)) {
          return false;
        }
      }

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        GenericUDFOPOr or = new GenericUDFOPOr();
        List<ExprNodeDesc> expressions = new ArrayList<ExprNodeDesc>(2);
        expressions.add(previous);
        expressions.add(current);
        ExprNodeDesc orExpr =
            new ExprNodeGenericFuncDesc(TypeInfoFactory.booleanTypeInfo, or, expressions);
        previous = orExpr;
      } else {
        // If an expression does not have a where clause, there can be no common filter
        previous = null;
        break;

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      }
    }


    ExprNodeDesc equalsExpr = null;
    {
      ExprNodeDesc hashfnExpr = new ExprNodeGenericFuncDesc(
          TypeInfoFactory.intTypeInfo, new GenericUDFHash(), args);
      assert (hashfnExpr != null);
      LOG.info("hashfnExpr = " + hashfnExpr);
      ExprNodeDesc andExpr = TypeCheckProcFactory.DefaultExprProcessor
          .getFuncExprNodeDesc("&", hashfnExpr, intMaxExpr);

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      for (; i < preds.size(); i++) {
        List<ExprNodeDesc> children = new ArrayList<ExprNodeDesc>(2);
        children.add(condn);
        children.add(preds.get(i));
        condn = new ExprNodeGenericFuncDesc(TypeInfoFactory.booleanTypeInfo,
            FunctionRegistry.getGenericUDFForAnd(), children);
      }
    }


    if (condn == null) {

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        return residual1;
      }
      List<ExprNodeDesc> residuals = new ArrayList<ExprNodeDesc>();
      residuals.add(residual1);
      residuals.add(residual2);
      return new ExprNodeGenericFuncDesc(
        TypeInfoFactory.booleanTypeInfo,
        FunctionRegistry.getGenericUDFForAnd(),
        residuals);
    }


    String udfName;
    ExprNodeGenericFuncDesc funcDesc = (ExprNodeGenericFuncDesc) expr;
    if (funcDesc.getGenericUDF() instanceof GenericUDFBridge) {
      GenericUDFBridge func = (GenericUDFBridge) funcDesc.getGenericUDF();
      udfName = func.getUdfName();
    } else {
      udfName = funcDesc.getGenericUDF().getClass().getName();
    }
    if (!udfNames.contains(udfName)) {
      return expr;
    }

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