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https://issues.apache.org/jira/browse/SPARK-12904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15106491#comment-15106491
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Liang-Chi Hsieh commented on SPARK-12904:
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Yeah. I would like to do. Thanks!
> Strength reduction for integer/decimal comparisons
> --------------------------------------------------
>
> Key: SPARK-12904
> URL: https://issues.apache.org/jira/browse/SPARK-12904
> Project: Spark
> Issue Type: Bug
> Components: Optimizer, SQL
> Reporter: Reynold Xin
>
> We can do the following strength reduction for comparisons between an
> integral column and a decimal literal:
> 1. int_col > decimal_literal => int_col > floor(decimal_literal)
> 2. int_col >= decimal_literal => int_col > ceil(decimal_literal)
> 3. int_col < decimal_literal => int_col < floor(decimal_literal)
> 4. int_col <= decimal_literal => int_col < ceil(decimal_literal)
> This is more useful as soon as we start parsing floating point numeric
> literals as decimals rather than doubles (SPARK-12848).
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