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https://issues.apache.org/jira/browse/FLINK-36100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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lincoln lee updated FLINK-36100:
--------------------------------
    Affects Version/s: 1.19.1
                       1.20.0

> Support ESCAPE in built-in function LIKE formally
> -------------------------------------------------
>
>                 Key: FLINK-36100
>                 URL: https://issues.apache.org/jira/browse/FLINK-36100
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.20.0, 1.19.1
>            Reporter: Dylan He
>            Assignee: Dylan He
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.0.0
>
>
> Flink does not formally support ESCAPE in built-in function LIKE, but in some 
> cases we do need it because '_' and '%' are interpreted as special wildcard 
> characters, preventing their use in their literal sense.
> And currently, if we forcefully use ESCAPE characters, we will get unexpected 
> results like the cases below.
> {code:SQL}
> > SELECT 'TE_ST' LIKE '%E\_S%';
>  FALSE
> > SELECT 'TE_ST' LIKE '%E\_S%' ESCAPE '\';
>  ERROR
> {code}



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