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https://issues.apache.org/jira/browse/ARROW-18294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17631290#comment-17631290
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James Henderson commented on ARROW-18294:
-----------------------------------------
Separately, I've merged a PoC of Flight SQL server support for our XTDB Core2
today - it currently supports simple queries, transactions and prepared
statements through the Flight SQL client. Still plenty to do, but we're
certainly very excited to see what tooling and ecosystem this might open up in
the near future!
> [Java][FlightRPC] 'Signature not found' calling `executeUpdate` on FlightSQL
> prepared statement
> -----------------------------------------------------------------------------------------------
>
> Key: ARROW-18294
> URL: https://issues.apache.org/jira/browse/ARROW-18294
> Project: Apache Arrow
> Issue Type: Bug
> Components: FlightRPC, Java
> Affects Versions: 10.0.0
> Reporter: James Henderson
> Assignee: David Li
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Hey folks :)
> I'm hitting the 'signature not found' NPE precondition in
> {{ArrowFlightMetaImpl.execute}} when I prepare a DML statement and call
> {{executeUpdate}} (the prepare step seems to work fine):
> {code}
> Preconditions.java: 801
> cfjd.org.apache.arrow.util.Preconditions/checkNotNull
> ArrowFlightMetaImpl.java: 86
> org.apache.arrow.driver.jdbc.ArrowFlightMetaImpl/execute
> ArrowFlightMetaImpl.java: 96
> org.apache.arrow.driver.jdbc.ArrowFlightMetaImpl/execute
> AvaticaConnection.java: 548
> cfjd.org.apache.calcite.avatica.AvaticaConnection/executeQueryInternal
> AvaticaPreparedStatement.java: 152
> cfjd.org.apache.calcite.avatica.AvaticaPreparedStatement/executeLargeUpdate
> AvaticaPreparedStatement.java: 147
> cfjd.org.apache.calcite.avatica.AvaticaPreparedStatement/executeUpdate
> {code}
> It seems that this will always be null in this situation because
> {{AvaticaPreparedStatement.executeLargeUpdate}} calls
> {{executeQueryInternal}} with a null signature, regardless of the signature
> in the prepared statement itself (which is non-null)?
> Otherwise, enjoying playing with FlightSQL so far - thanks!
> James
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