drill-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Norris Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-884) Query used to derive result set metadata for Tableau's "Custom SQL" does not run
Date Thu, 05 Jun 2014 16:52:03 GMT

    [ https://issues.apache.org/jira/browse/DRILL-884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018956#comment-14018956
] 

Norris Lee commented on DRILL-884:
----------------------------------

This seems to be an issue with the '*'. If the inner query explicitly states the column, then
it will run fine. For example,
{code}
Select `TableauSQL`.`address` AS `address` FROM (select `address` from `dfs`.`default`.`/opt/drill/raw-files/click1.json`)
`TableauSQL`
{code}
will execute while
{code}
Select `TableauSQL`.`address` AS `address` FROM (select * from `dfs`.`default`.`/opt/drill/raw-files/click1.json`)
`TableauSQL`
{code}
will not, with the "Column 'address' not found in table 'TableauSQL'" message.

> 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
>            Reporter: George Chow
>
> 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}



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message