[teiid-issues] [JBoss JIRA] Created: (TEIID-1705) Encountered NPE in SQLStringVisitor for TIMESTAMPADD and TIMESTAMPDIFF

[Mark Drilling (JIRA)]

Encountered NPE in SQLStringVisitor for TIMESTAMPADD and TIMESTAMPDIFF
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                 Key: TEIID-1705
                 URL: https://issues.jboss.org/browse/TEIID-1705
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 7.4
            Reporter: Mark Drilling
            Assignee: Steven Hawkins


I was using expression builder in Designer when I encountered this NPE. 

java.lang.NullPointerException
	at org.teiid.query.sql.visitor.SQLStringVisitor.visit(SQLStringVisitor.java:1280)
	at org.teiid.query.sql.symbol.Function.acceptVisitor(Function.java:182)
	at org.teiid.query.sql.visitor.SQLStringVisitor.getSQLString(SQLStringVisitor.java:164)
	at com.metamatrix.query.internal.ui.builder.util.LanguageObjectLabelProvider.getText(LanguageObjectLabelProvider.java:129)

I think the visit method for FUNCTION in SQLStringVisitor just needs to do a null check on the first arg.  I'm attaching a code patch. 

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