[jira] [Resolved] (SPARK-12904) Strength reduction for integer/decimal comparisons

["Reynold Xin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-12904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin resolved SPARK-12904.
---------------------------------
       Resolution: Fixed
         Assignee: Reynold Xin
    Fix Version/s: 2.0.0

> 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
>            Assignee: Reynold Xin
>             Fix For: 2.0.0
>
>
> 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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