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https://issues.apache.org/jira/browse/CALCITE-2206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433281#comment-16433281
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Julian Hyde commented on CALCITE-2206:
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Reviewing and testing now. Will commit when tests pass.
> Queries with window functions fail when using HSQLDB
> ----------------------------------------------------
>
> Key: CALCITE-2206
> URL: https://issues.apache.org/jira/browse/CALCITE-2206
> Project: Calcite
> Issue Type: Bug
> Components: jdbc-adapter
> Affects Versions: 1.15.0
> Reporter: Pavel Gubin
> Assignee: Julian Hyde
> Priority: Major
>
> Queries containing window functions fail when using HSQLDB (or any other DB
> that does not support window functions) because optimiser converts them to
> native SQL with window functions which are not supported by HSQLDB. For
> example:
> {code:sql}
> select "store_id", "product_id", sum("unit_sales") unit_sales, row_number()
> over (
> partition by "store_id" order by sum("unit_sales") desc
> ) row_num
> from "sales_fact_1998"
> group by "store_id", "product_id"
> {code}
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