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https://issues.apache.org/jira/browse/ASTERIXDB-2760?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Lychagin resolved ASTERIXDB-2760.
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Resolution: Fixed
> Group by expression substitution must be case insensitive for builtin
> function names
> ------------------------------------------------------------------------------------
>
> Key: ASTERIXDB-2760
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2760
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: COMP - Compiler
> Affects Versions: 0.9.4
> Reporter: Dmitry Lychagin
> Assignee: Dmitry Lychagin
> Priority: Major
> Fix For: 0.9.6
>
>
> When a grouping expression is used in the SELECT clause the compiler replaces
> the expression in the SELECT clause with a variable assigned to that
> expression by the GROUP BY clause.
> {noformat}
> SELECT f(x) FROM ds GROUP BY f(x) AS y
> {noformat}
> is rewritten by the compiler into
> {noformat}
> SELECT y FROM ds GROUP BY f(x) AS y
> {noformat}
> However when comparing GROUP BY / SELECT expressions the compiler currently
> compares function names in a case-sensitive fashion (function names are not
> yet normalized at that point). This is incorrect for built-in functions
> because their names are supposed to be case insensitive.
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