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From jacques-n <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-3232: Handle promoting writers and vecto...
Date Fri, 30 Oct 2015 04:53:26 GMT
Github user jacques-n commented on a diff in the pull request:

    https://github.com/apache/drill/pull/207#discussion_r43471737
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/expr/ExpressionTreeMaterializer.java
---
    @@ -308,10 +334,115 @@ public LogicalExpression visitFunctionCall(FunctionCall call, FunctionLookupCont
             return matchedNonDrillFuncHolder.getExpr(call.getName(), extArgsWithCast, call.getPosition());
           }
     
    +      if (hasUnionInput(call)) {
    +        return rewriteUnionFunction(call, functionLookupContext);
    +      }
    +
           logFunctionResolutionError(errorCollector, call);
           return NullExpression.INSTANCE;
         }
     
    +    private static final Set<String> UNION_FUNCTIONS;
    +
    +    static {
    +      UNION_FUNCTIONS = new HashSet<>();
    +      for (MinorType t : MinorType.values()) {
    +        UNION_FUNCTIONS.add("assert_" + t.name().toLowerCase());
    +        UNION_FUNCTIONS.add("is_" + t.name().toLowerCase());
    +      }
    +      UNION_FUNCTIONS.add("typeof");
    +    }
    +
    +    private boolean hasUnionInput(FunctionCall call) {
    +      for (LogicalExpression arg : call.args) {
    +        if (arg.getMajorType().getMinorType() == MinorType.UNION) {
    +          return true;
    +        }
    +      }
    +      return false;
    +    }
    +
    +    private LogicalExpression rewriteUnionFunction(FunctionCall call, FunctionLookupContext
functionLookupContext) {
    --- End diff --
    
    javadoc please


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