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https://issues.apache.org/jira/browse/CALCITE-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16824858#comment-16824858
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Julian Hyde commented on CALCITE-2282:
--------------------------------------

I don’t think we need to worry about CASE or VALUES, or anything with special 
syntax. These are already associated with an operator in SqlStdOperatorTable at 
parse time. We only need to deal with calls that have function or identifier 
syntax. 

> Allow OperatorTable to be pluggable in the parser
> -------------------------------------------------
>
>                 Key: CALCITE-2282
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2282
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Sudheesh Katkam
>            Priority: Major
>         Attachments: CALCITE-2282.patch.txt
>
>
> SqlAbstractParserImpl [hardcodes OperatorTable to 
> SqlStdOperatorTable|https://github.com/apache/calcite/blob/8327e674e7f0a768d124fa37fd75cda4b8a35bb6/core/src/main/java/org/apache/calcite/sql/parser/SqlAbstractParserImpl.java#L334|https://github.com/apache/calcite/blob/8327e674e7f0a768d124fa37fd75cda4b8a35bb6/core/src/main/java/org/apache/calcite/sql/parser/SqlAbstractParserImpl.java#L334].
>  Make this pluggable via a protected method.



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