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https://issues.apache.org/jira/browse/CALCITE-7565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18090599#comment-18090599
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Sergey Nuyanzin commented on CALCITE-7565:
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Thank you for the review [~caicancai], [~xuzifu666]
> TRIM without FROM fails at parsing time
> ---------------------------------------
>
> Key: CALCITE-7565
> URL: https://issues.apache.org/jira/browse/CALCITE-7565
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.39.0
> Reporter: Sergey Nuyanzin
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.43.0
>
>
> Before Calcite 1.39.0 the queries
> {code:sql}
> SELECT TRIM(BOTH ' a ');
> SELECT TRIM(LEADING ' a ');
> SELECT TRIM(TRAILING ' a ');
> {code}
> worked
> after that it fails on parser and requires {{FROM}} like
> {code:sql}
> SELECT TRIM(BOTH FROM ' a ');
> SELECT TRIM(LEADING FROM ' a ');
> SELECT TRIM(TRAILING FROM ' a ');
> {code}
> probably the regression after CALCITE-6709.
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