Examples of org.apache.hadoop.hive.ql.exec.FunctionInfo

org.apache.hadoop.hive.ql.exec.FunctionInfo

    int udtfExprType = udtfExpr.getType();
    if (udtfExprType == HiveParser.TOK_FUNCTION
        || udtfExprType == HiveParser.TOK_FUNCTIONSTAR) {
      String funcName = TypeCheckProcFactory.DefaultExprProcessor
          .getFunctionText(udtfExpr, true);
      FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
      if (fi != null) {
        genericUDTF = fi.getGenericUDTF();
      }
      isUDTF = (genericUDTF != null);
      if (isUDTF) {
        globalLimitCtx.setHasTransformOrUDTF(true);
      }
      if (isUDTF && !fi.isNative()) {
        unparseTranslator.addIdentifierTranslation((ASTNode) udtfExpr
            .getChild(0));
      }
      if (isUDTF && (selectStar = udtfExprType == HiveParser.TOK_FUNCTIONSTAR)) {
        genColListRegex(".*", null, (ASTNode) udtfExpr.getChild(0),

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  public static boolean isCustomUDF(ExprNodeGenericFuncDesc expr) {
    String udfName = expr.getFuncText();
    if (udfName == null) {
      return false;
    }
    FunctionInfo funcInfo = FunctionRegistry.getFunctionInfo(udfName);
    if (funcInfo == null) {
      return false;
    }
    boolean isNativeFunc = funcInfo.isNative();
    return !isNativeFunc;
  }

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        name = FunctionRegistry.UNARY_PLUS_FUNC_NAME;
      } else if (name == "-") {
        name = FunctionRegistry.UNARY_MINUS_FUNC_NAME;
      }
    }
    FunctionInfo hFn = name != null ? FunctionRegistry.getFunctionInfo(name) : null;
    if (hFn == null)
      hFn = handleExplicitCast(op, dt);
    return hFn == null ? null : hFn.getGenericUDF();
  }

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      hFn = handleExplicitCast(op, dt);
    return hFn == null ? null : hFn.getGenericUDF();
  }


  private static FunctionInfo handleExplicitCast(SqlOperator op, RelDataType dt) {
    FunctionInfo castUDF = null;


    if (op.kind == SqlKind.CAST) {
      TypeInfo castType = TypeConverter.convert(dt);


      if (castType.equals(TypeInfoFactory.byteTypeInfo)) {

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    try {
      udf.setTypeInfo(ti);
    } catch (UDFArgumentException e) {
      throw new RuntimeException(e);
    }
    return new FunctionInfo(fi.isNative(), fi.getDisplayName(), (GenericUDF) udf);
  }

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      registerFunction("<>", SqlStdOperatorTable.NOT_EQUALS, hToken(HiveParser.NOTEQUAL, "<>"));
    }


    private void registerFunction(String name, SqlOperator optiqFn, HiveToken hiveToken) {
      reverseOperatorMap.put(optiqFn, name);
      FunctionInfo hFn = FunctionRegistry.getFunctionInfo(name);
      if (hFn != null) {
        String hFnName = getName(hFn.getGenericUDF());
        hiveToOptiq.put(hFnName, optiqFn);


        if (hiveToken != null) {
          optiqToHiveToken.put(optiqFn, hiveToken);
        }

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      // 5. Bailout if select involves UDTF
      ASTNode expr = (ASTNode) selExprList.getChild(posn).getChild(0);
      int exprType = expr.getType();
      if (exprType == HiveParser.TOK_FUNCTION || exprType == HiveParser.TOK_FUNCTIONSTAR) {
        String funcName = TypeCheckProcFactory.DefaultExprProcessor.getFunctionText(expr, true);
        FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
        if (fi != null && fi.getGenericUDTF() != null) {
          String msg = String.format("UDTF " + funcName + " is currently not supported in CBO,"
              + " turn off cbo to use UDTF " + funcName);
          LOG.debug(msg);
          throw new OptiqSemanticException(msg);
        }

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     * @throws UDFArgumentException
     */
    static ExprNodeDesc getFuncExprNodeDescWithUdfData(String udfName, TypeInfo typeInfo,
        ExprNodeDesc... children) throws UDFArgumentException {


      FunctionInfo fi = FunctionRegistry.getFunctionInfo(udfName);
      if (fi == null) {
        throw new UDFArgumentException(udfName + " not found.");
      }


      GenericUDF genericUDF = fi.getGenericUDF();
      if (genericUDF == null) {
        throw new UDFArgumentException(udfName
            + " is an aggregation function or a table function.");
      }

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        } else {
          throw new SemanticException(ErrorMsg.NON_COLLECTION_TYPE.getMsg(expr, myt.getTypeName()));
        }
      } else {
        // other operators or functions
        FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcText);


        if (fi == null) {
          if (isFunction) {
            throw new SemanticException(ErrorMsg.INVALID_FUNCTION
                .getMsg((ASTNode) expr.getChild(0)));
          } else {
            throw new SemanticException(ErrorMsg.INVALID_FUNCTION.getMsg(expr));
          }
        }


        // getGenericUDF() actually clones the UDF. Just call it once and reuse.
        GenericUDF genericUDF = fi.getGenericUDF();


        if (!fi.isNative()) {
          ctx.getUnparseTranslator().addIdentifierTranslation(
              (ASTNode) expr.getChild(0));
        }


        // Handle type casts that may contain type parameters

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        if (FunctionRegistry.getGenericUDAFResolver(functionName) != null) {
          if(containsLeadLagUDF(expressionTree)) {
            throw new SemanticException(ErrorMsg.MISSING_OVER_CLAUSE.getMsg(functionName));
          }
          aggregations.put(expressionTree.toStringTree().toLowerCase(), expressionTree);
          FunctionInfo fi = FunctionRegistry.getFunctionInfo(functionName);
          if (!fi.isNative()) {
            unparseTranslator.addIdentifierTranslation((ASTNode) expressionTree
                .getChild(0));
          }
          return;
        }

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