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Posted to issues@calcite.apache.org by "Robert Yokota (Jira)" <ji...@apache.org> on 2019/09/04 22:43:00 UTC

[jira] [Created] (CALCITE-3324) Infinite loop when calling DDL from remote Avatica driver to LocalService wrapping CalciteMetaImpl

Robert Yokota created CALCITE-3324:
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             Summary: Infinite loop when calling DDL from remote Avatica driver to LocalService wrapping CalciteMetaImpl
                 Key: CALCITE-3324
                 URL: https://issues.apache.org/jira/browse/CALCITE-3324
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.20.0
            Reporter: Robert Yokota


I encountered an infinite loop when submitting DDL from a remote Avatica driver (using sqlline) against a LocalService wrapping CalciteMetaImpl.

I was able to debug the issue and verified a fix.

The problem was that in CalciteMetaImpl.prepareAndExecute, the updateCount is not being passed to the MetaResultSetImpl constructor.  Instead, the updateCount is always set to -1.  This incorrectly instructs the remote Avatica driver to fetch results when there aren't any, which causes it to loop.

By fixing the CalciteMetaImpl.prepareAndExecute method to set the updateCount in MetaResultSetImpl, I was able to fix the infinite loop.



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