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https://issues.apache.org/jira/browse/CALCITE-6931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Caican Cai resolved CALCITE-6931.
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Resolution: Fixed
> STARTSWITH/ENDSWITH in SPARK should not convert to STARTS_WITH/ENDS_WITH
> ------------------------------------------------------------------------
>
> Key: CALCITE-6931
> URL: https://issues.apache.org/jira/browse/CALCITE-6931
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.39.0
> Reporter: Yu Xu
> Assignee: Yu Xu
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.40.0
>
>
> *origin sql:*
> select startswith(\"brand_name\", 'a') from \"product\"
>
> *currently spark dialect would convert to:*
> SELECT STARTS_WITH(`brand_name`, 'a') FROM `foodmart`.`product`
>
> *this is not right, if execute would error out:*
> spark-sql> select starts_with('aab', 'a');
> Error in query: Undefined function: 'starts_with'. This function is neither a
> registered temporary function nor a permanent function registered in the
> database 'default'.; line 1 pos 7
>
> *correct should convert to：*
> SELECT STARTSWITH(`brand_name`, 'a') FROM `foodmart`.`product`
>
> the same is function ENDSWITH，we also find out in doc:
> [https://spark.apache.org/docs/latest/sql-ref-functions-builtin.html#string-functions]
> need to fix the bug.
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