[teiid-issues] [JBoss JIRA] (TEIID-2337) Source Hints documenation states source hints can be used in user and transformation queries
Johnathon Lee (JIRA)
jira-events at lists.jboss.org
Mon Jan 7 08:07:08 EST 2013
[ https://issues.jboss.org/browse/TEIID-2337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Johnathon Lee resolved TEIID-2337.
----------------------------------
Resolution: Rejected
The SQuirreL SQL client was stripping the HINT. After changing client settings this worked for passing a HINT in a client SQL statement.
> Source Hints documenation states source hints can be used in user and transformation queries
> ---------------------------------------------------------------------------------------------
>
> Key: TEIID-2337
> URL: https://issues.jboss.org/browse/TEIID-2337
> Project: Teiid
> Issue Type: Bug
> Components: JDBC Driver, Query Engine
> Affects Versions: 7.7.2, 8.2
> Reporter: Johnathon Lee
> Assignee: Johnathon Lee
>
> Per [1], 15.2.13.4 states that user queries can contain source hints.
> Using hints in transformations as follows [2], I can see the HINT being passed to source. Using a SQL client such as SQuirreL and the Teiid Driver the START USER COMMAND does not show the HINT being passed in.
> [1]
> https://access.redhat.com/knowledge/docs/en-US/JBoss_Enterprise_Data_Services/5/html/Data_Services_Reference_Guide/federated_planning.html#query_plan
> [2]
> I have completed a few steps in order to verify the source hint can be passed along using a test vdb (bqt using SLNTDS08.mw.lab.eng.bos.redhat.com).
> Created a view (SourceView.SMALLA) with the transformation [1a]. Note that there seems to be an issue with designer recognizing the format of the hint in the SQL statement and discarding (which is why the /*+sh:'general hint' has been included). Note that "Source:" is the Source Name specified by the Translator (this can be seen when viewing the vdb in designer).
> Turned up the logging to trace for org.teiid in the logging subsystem [2a].
> Verified via the logging that the hint is being passed to the source system [3a]
> [1a]
> SELECT /*+sh:'general hint' Source:'FIRST_ROWS(10)' */
> *
> FROM
> Source.SmallA
> [2a]
> ...
> <logger category="org.teiid">
> <level name="TRACE"/>
> </logger>
> ...
> [3a]
> 8:54:01,592 DEBUG [org.teiid.CONNECTOR] (Worker1_QueryProcessorQueue6) Source-specific command: SELECT /*+ FIRST_ROWS(10) */ g_0.INTKEY FROM SMALLA g_0
> [3]
> 2012-12-31 08:48:20,413 DEBUG [org.teiid.COMMAND_LOG] (New I/O server worker #1-1) START USER COMMAND: startTime=2012-12-31 08:48:20.413 requestID=Rg1eL+X/XzJ3.5 txID=null sessionID=Rg1eL+X/XzJ3 applicationName=JDBC principal=admin at teiid-security vdbName=bqt vdbVersion=1 sql=SELECT
> *
> FROM
> Source.SmallA
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