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Posted to dev@calcite.apache.org by "Gregory Hart (Jira)" <ji...@apache.org> on 2021/11/17 23:50:00 UTC

[jira] [Created] (CALCITE-4892) Conversion from String in cursor accessors

Gregory Hart created CALCITE-4892:
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             Summary: Conversion from String in cursor accessors
                 Key: CALCITE-4892
                 URL: https://issues.apache.org/jira/browse/CALCITE-4892
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Gregory Hart


Numeric accessors (such as LongAccessor) of the AbstractCursor class could automatically convert strings to the appropriate numeric type.

Also, I looked to see if I could instead easily provide my own accessor implementations in Calcite, but the cursor implementation is hardcoded in CalciteResultSet and is not easy to override.

An example where this would be useful is when using the JDBC adapter with PostgreSQL and Hibernate. Hibernate is expecting this conversion to happen in the driver and fails when Calcite throws an exception: cannot convert to long.



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