[teiid-issues] [JBoss JIRA] (TEIID-5034) Couchbase SUBSTRING function returns null when reaches end of string

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-5034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480732#comment-13480732 ] 

RH Bugzilla Integration commented on TEIID-5034:
------------------------------------------------

Van Halbert <vhalbert at redhat.com> changed the Status of [bug 1484915|https://bugzilla.redhat.com/show_bug.cgi?id=1484915] from MODIFIED to ON_QA

> Couchbase SUBSTRING function returns null when reaches end of string
> --------------------------------------------------------------------
>
>                 Key: TEIID-5034
>                 URL: https://issues.jboss.org/browse/TEIID-5034
>             Project: Teiid
>          Issue Type: Bug
>          Components: Misc. Connectors
>    Affects Versions: 8.12.x-6.4
>            Reporter: Jan Stastny
>            Assignee: Steven Hawkins
>
> Couchbase return null when y points after the string end in SUBSTRING(VALUE, x, y). That's not what is expected from Teiid.
> Teiid:
> {code:sql|title=query1}
> SELECT SUBSTRING('49',1, 10)
> {code}
> || expr1 ||
> || 49 ||
> Couchbase pushdown:
> {code:sql|title=query2}
> SELECT SUBSTRING(BQT1.SmallA.intkey, 1, 10) FROM BQT1.SmallA WHERE IntKey=49
> {code}
> || expr1 ||
> || <null> ||
> {code:title=teiid-command.log}
> 16:18:57,156 INFO  [org.teiid.COMMAND_LOG] (New I/O worker #2) QE2ZpDa/Btt5     START USER COMMAND: startTime=2017-08-24 16:18:57.156       requestID=QE2ZpDa/Btt5.124    txID=null sessionID=QE2ZpDa/Btt5        applicationName=JDBC          principal=user at teiid-security vdbName=couchbase   vdbVersion=1        sql=SELECT SUBSTRING(BQT1.SmallA.intkey, 1, 10) FROM BQT1.SmallA WHERE IntKey=49
> 16:18:57,160 DEBUG [org.teiid.COMMAND_LOG] (Worker39_QueryProcessorQueue353) QE2ZpDa/Btt5           START DATA SRC COMMAND:       startTime=2017-08-24 16:18:57.16        requestID=QE2ZpDa/Btt5.124    sourceCommandID=0   executionID=85      txID=null modelName=Couchbase_small     translatorName=couchbase      sessionID=QE2ZpDa/Btt5        principal=user at teiid-security sql=SELECT SUBSTRING(convert(Couchbase_small.SmallA.IntKey, string), 1, 10) FROM Couchbase_small.SmallA WHERE Couchbase_small.SmallA.IntKey = 49
> 16:18:57,160 DEBUG [org.teiid.COMMAND_LOG] (Worker39_QueryProcessorQueue353) QE2ZpDa/Btt5           SOURCE SRC COMMAND: endTime=2017-08-24 16:18:57.16          requestID=QE2ZpDa/Btt5.124    sourceCommandID=0   executionID=85      txID=null modelName=Couchbase_small     translatorName=couchbase      sessionID=QE2ZpDa/Btt5        principal=user at teiid-security sourceCommand=[SELECT SUBSTR(TOSTRING(`$cb_c1_IntKey`), 1, 10) FROM `dvqe_small` `$cb_t1` LET `$cb_c1_IntKey` = `$cb_t1`.`IntKey` WHERE `$cb_c1_IntKey` = 49 AND `$cb_t1`.`type` = 'SmallA']
> 16:18:57,449 DEBUG [org.teiid.COMMAND_LOG] (Worker38_QueryProcessorQueue354) QE2ZpDa/Btt5           END SRC COMMAND:    endTime=2017-08-24 16:18:57.449         requestID=QE2ZpDa/Btt5.124    sourceCommandID=0   executionID=85      txID=null modelName=Couchbase_small     translatorName=couchbase      sessionID=QE2ZpDa/Btt5        principal=user at teiid-security finalRowCount=1     cpuTime(ns)=1213042
> 16:18:57,456 INFO  [org.teiid.COMMAND_LOG] (Worker38_QueryProcessorQueue355) QE2ZpDa/Btt5           END USER COMMAND:   endTime=2017-08-24 16:18:57.456         requestID=QE2ZpDa/Btt5.124    txID=null sessionID=QE2ZpDa/Btt5        principal=user at teiid-security vdbName=couchbase   vdbVersion=1        finalRowCount=1
> {code}



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