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https://issues.apache.org/jira/browse/CALCITE-5955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17768106#comment-17768106
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Tanner Clary commented on CALCITE-5955:
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[~julianhyde] If you are trying to parse a query like {{SELECT
PERCENTILE_CONT(users.age, .5) OVER(PARTITION BY users.id)}} would this not
qualify as a window function? This is considered valid according to BigQuery's
syntax.
> BigQuery PERCENTILE functions are unparsed incorrectly
> ------------------------------------------------------
>
> Key: CALCITE-5955
> URL: https://issues.apache.org/jira/browse/CALCITE-5955
> Project: Calcite
> Issue Type: Bug
> Reporter: Tanner Clary
> Assignee: Tanner Clary
> Priority: Major
> Labels: pull-request-available
>
> Currently if you have a query like:
> {{SELECT PERCENTILE_CONT(x, .5) OVER() FROM x;}} the {{OVER()}} clause gets
> unparsed with a {{window frame clause}} which BigQuery defines
> [here|https://cloud.google.com/bigquery/docs/reference/standard-sql/window-function-calls#def_window_frame].
>
> From the docs: "Only aggregate analytic functions can use a window frame
> clause."
> This causes BigQuery to fail with the following error: {{Window framing
> clause is not allowed for analytic function percentile_cont}}
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