[teiid-issues] [JBoss JIRA] (TEIID-3600) DB2 - error getting substring if "from position" is out of range

[Juraj Duráni (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-3600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Juraj Duráni reopened TEIID-3600:
---------------------------------


The query is still failing. I can see condition in the source-specific command like follows:
{code:sql}
CASE WHEN 40 > length(varchar(g_0.TIMESTAMPVALUE)) THEN (length(varchar(g_0.TIMESTAMPVALUE)) + 1)
{code}

I believe that this is wrong as *(length(varchar(g_0.TIMESTAMPVALUE)) + 1)* is obviously greater than *length(varchar(g_0.TIMESTAMPVALUE))* which actually causes the exception.

Source-specific command:
{code:sql}
SELECT substr(varchar(g_0.TIMESTAMPVALUE), CASE WHEN 40 > length(varchar(g_0.TIMESTAMPVALUE)) THEN (length(varchar(g_0.TIMESTAMPVALUE)) + 1) ELSE 40 END, CASE WHEN 0 > (length(varchar(g_0.TIMESTAMPVALUE)) - (CASE WHEN 40 > length(varchar(g_0.TIMESTAMPVALUE)) THEN (length(varchar(g_0.TIMESTAMPVALUE)) + 1) ELSE 40 END - 1)) THEN (length(varchar(g_0.TIMESTAMPVALUE)) - (CASE WHEN 40 > length(varchar(g_0.TIMESTAMPVALUE)) THEN (length(varchar(g_0.TIMESTAMPVALUE)) + 1) ELSE 40 END - 1)) ELSE 0 END) FROM SMALLA AS g_0 WHERE integer(g_0.INTKEY) = 1
{code}

> DB2 - error getting substring if "from position" is out of range
> ----------------------------------------------------------------
>
>                 Key: TEIID-3600
>                 URL: https://issues.jboss.org/browse/TEIID-3600
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Misc. Connectors
>            Reporter: Juraj Duráni
>            Assignee: Steven Hawkins
>             Fix For: 9.0, 8.12.5, 8.13.5
>
>
> If second argument of a SUBSTRING(x,y,z) function is out of range of first argument an exception is thrown [1]. Source-specific command [2].
> [1]
> Caused by: com.ibm.db2.jcc.am.SqlDataException: DB2 SQL Error: SQLCODE=-138, SQLSTATE=22011, SQLERRMC=null, DRIVER=4.12.55
> 	at com.ibm.db2.jcc.am.hd.a(hd.java:668)
> 	at com.ibm.db2.jcc.am.hd.a(hd.java:60)
> ...
> [2]
> SELECT substr(varchar(g_0.TimestampValue), 40, CASE WHEN 0 > (length(varchar(g_0.TimestampValue)) - (40 - 1)) THEN (length(varchar(g_0.TimestampValue)) - (40 - 1)) ELSE 0 END) FROM SmallA AS g_0 WHERE g_0.IntKey = 1



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