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Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2014/06/20 22:28:28 UTC
[jira] [Resolved] (DRILL-884) Query used to derive result set
metadata for Tableau's "Custom SQL" does not run
[ https://issues.apache.org/jira/browse/DRILL-884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jacques Nadeau resolved DRILL-884.
----------------------------------
Resolution: Fixed
Assignee: (was: Steven Phillips)
> Query used to derive result set metadata for Tableau's "Custom SQL" does not run
> --------------------------------------------------------------------------------
>
> Key: DRILL-884
> URL: https://issues.apache.org/jira/browse/DRILL-884
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Reporter: George Chow
> Priority: Critical
> Labels: Tableau
> Fix For: 1.0.0-BETA1
>
> Attachments: DRILL-884.patch
>
>
> The following style of query is used by Tableau to derive the metadata of a custom SQL:
> From Tableau's protocol server log:
> {code}
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: ODBCProtocol::ReadMetadataImpl: Attempting to read metadata from the prepared / executed query result set.
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: ODBCProtocolImpl::ReadMetadataImpl: Reading metadata using a prepared statement.
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: <QUERY protocol='0367b1f0'>
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: SELECT *
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: FROM (
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: select * from dfs.`default`.`/opt/drill/raw-files/click1.json`
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: ) `TableauSQL`
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: WHERE (0 = 1)
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: </QUERY>
> 2014-05-30 18:35:39.718 (-,-,-,-) 0ea0: ODBCProtocolImpl::ReadMetadataImpl: SQLPrepare failed. Reading metadata using an executed query.
> 2014-05-30 18:35:47.640 (-,-,-,-) 0ea0: ODBCProtocolImpl::ReadMetadataImpl: No columns were reported!
> {code}
> Extracting the query to run inside sqlline shows the problem:
> {code}
> 0: jdbc:drill:zk=localhost:5181> select * from (select * from dfs.`default`.`/opt/drill/raw-files/click1.json`) `TableauSQL` where (0=1);
> +--+
> | |
> +--+
> +--+
> No rows selected (9.059 seconds)
> {code}
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