[teiid-issues] [JBoss JIRA] (TEIID-2337) Source Hints documenation states source hints can be used in user and transformation queries

[Johnathon Lee (JIRA)]

Johnathon Lee created TEIID-2337:
------------------------------------

             Summary: 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: 8.2, 7.7.2
            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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