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https://issues.apache.org/jira/browse/CALCITE-4740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17400483#comment-17400483
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Julian Hyde commented on CALCITE-4740:
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Or, when generating a HAVING clause, in a dialect where a HAVING clause can see
aliases, don't generate references to aliases that start "expr$"? (I know your
change strips away such aliases, but better to not reference the aliases in the
first place.)
> JDBC adapter generates incorrect HAVING clause in BigQuery dialect
> ------------------------------------------------------------------
>
> Key: CALCITE-4740
> URL: https://issues.apache.org/jira/browse/CALCITE-4740
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.27.0
> Environment: jdk8
> macos
> Reporter: yanjing.wang
> Priority: Minor
>
> I'm converting
> {code:java}
> String query = select
> "product_id" , sum("shelf_width")
> from "foodmart"."product"
> where "product_id" > 0
> group by "product_id" having sum("shelf_width") > 1{code}
> with big query dialect, but results
> {code:java}
> SELECT product_id, SUM(shelf_width)
> FROM foodmart.product
> WHERE product_id > 0
> GROUP BY product_id
> HAVING `EXPR$1` > 1
> {code}
> Maybe we need replace having clause aliases when stripping trivial aliases.
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