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Drill, mail # dev - Review Request 16230: DRILL-320: Rework math functions to use codegen.


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Re: Review Request 16230: DRILL-320: Rework math functions to use codegen.
Jacques Nadeau 2013-12-17, 06:15

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https://reviews.apache.org/r/16230/#review30520
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exec/java-exec/src/main/codegen/data/MathFunctionTypes.tdd
<https://reviews.apache.org/r/16230/#comment58453>

    Where did you get these conversion rules?  For example, TinyInt + TinyInt => BigInt?
- Jacques Nadeau
On Dec. 13, 2013, 12:56 a.m., Mehant Baid wrote:
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/16230/
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>
> (Updated Dec. 13, 2013, 12:56 a.m.)
>
>
> Review request for drill and Jacques Nadeau.
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>
> Bugs: DRILL-320
>     https://issues.apache.org/jira/browse/DRILL-320
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>
> Repository: drill-git
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>
> Description
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>
> Rework the implementations of existing math functions to use codegen so that we have a more complete list of implementations. Previous implementations were done manually so we only had a handful of implementations for each function. Now that we are using freemarker to generate code during compile time we can easily have all the required implementations.
>
> We were also missing any implementation for multiply and divide functions, so added that as part of this JIRA.
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> The implementations added here are for inputs with similar types (eg: for the function 'add', the inputs can be of type INT, INT or FLOAT, FLOAT etc). The expectation is that if we have implementations for similar types of input, once we have implicit casting we should be able to cast one of the inputs so that both the inputs are of the same type.
>
>
> MathFunctionTypes.tdd, MathFunctionTemplates.java:
> The above two files are used by freemarker to generate code for all the types specified in MathFunctionTypes.tdd using the template specified in MathFunctionTemplates.java.
>
> ComparisonFunctions.java, SimpleRepeatedFunctions.java:
> Simple modification in these files to use the correct class for logging purposes.
>
> MathFunctions.java:
> This class used to contain some implementations for add, subtract methods. Removed those from here, since we have all the implementations via codegen.
>
> TestMathFunctions.java, simple_math_functions.json:
> Added really basic test cases for add and multiply functions.
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>
> Diffs
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>   exec/java-exec/src/main/codegen/config.fmpp cd2b2cc
>   exec/java-exec/src/main/codegen/data/MathFunctionTypes.tdd PRE-CREATION
>   exec/java-exec/src/main/codegen/templates/MathFunctionTemplates.java PRE-CREATION
>   exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/ComparisonFunctions.java 15034cd
>   exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/MathFunctions.java 288760b
>   exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/SimpleRepeatedFunctions.java 2f838b1
>   exec/java-exec/src/test/java/org/apache/drill/exec/fn/impl/TestMathFunctions.java PRE-CREATION
>   exec/java-exec/src/test/resources/functions/simple_math_functions.json PRE-CREATION
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> Diff: https://reviews.apache.org/r/16230/diff/
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>
> Testing
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> Manual testing using sqlline.
>
> Added basic test cases in TestMathFunctions.java, simple addition and multiplication of constants.
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>
> Thanks,
>
> Mehant Baid
>
>