Reynold Xin created SPARK-9132:
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Summary: Implement code gen for Conv
Key: SPARK-9132
URL: https://issues.apache.org/jira/browse/SPARK-9132
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Would be great to refactor the thing slightly so we can do code generation.
Since conv actually have some internal buffer, I think the best way is to
create a new NumberConverter class that contains the internal buffer, and move
most of the methods there. And then in Conv expression, we just create a
NumberConverter, and call it to do the conversion.
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