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Posted to issues@calcite.apache.org by "ChenLuyang (Jira)" <ji...@apache.org> on 2023/12/01 10:06:00 UTC

[jira] [Created] (CALCITE-6149) ClickHouseSqlDialect should support cast to Nullable

ChenLuyang created CALCITE-6149:
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             Summary: ClickHouseSqlDialect should support cast to Nullable
                 Key: CALCITE-6149
                 URL: https://issues.apache.org/jira/browse/CALCITE-6149
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.36.0
            Reporter: ChenLuyang


In ClickHouse, there is an issue with RelDataType of Nullable type when casting to a non-Nullable type. For example, {{SELECT CAST(NULL, 'Int32')}} will throw an error. In such cases, we should use {{SELECT CAST(NULL, 'Nullable(Int32)')}} instead.



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