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https://issues.apache.org/jira/browse/CALCITE-7109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18010007#comment-18010007
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Mihai Budiu commented on CALCITE-7109:
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I have asked many of the same questions Julian is asking in your previous issue
where you bundled all operations together.
You may need to implement several flavors of these operations if you want to
cover all variants.
> Add support for << operator in Calcite
> --------------------------------------
>
> Key: CALCITE-7109
> URL: https://issues.apache.org/jira/browse/CALCITE-7109
> Project: Calcite
> Issue Type: New Feature
> Reporter: krooswu
> Assignee: krooswu
> Priority: Major
> Labels: pull-request-available
>
> Calcite currently does not support the {{<<}} (bitwise left shift) operator
> in SQL expressions. This operator is commonly used in various SQL dialects
> (e.g., PostgreSQL, SQL Server, MySQL) for efficient manipulation of integer
> bit patterns.
> This issue proposes to add parser, validation, and Rex-level support for the
> {{<<}} operator, consistent with existing bitwise operations like {{{}&{}}},
> {{{}|{}}}, and {{{}^{}}}.
> *Scope:*
> * Extend the SQL parser to recognize the {{<<}} operator.
> * Implement a corresponding {{{}SqlBinaryOperator{}}}.
> * Add support in {{SqlToRelConverter}} and {{{}RexBuilder{}}}.
> * Add type inference and validation logic (e.g., restrict to integer types).
> * Write tests covering SQL parsing, validation, and execution via
> {{{}RexExecutor{}}}.
>
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