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https://issues.apache.org/jira/browse/DERBY-791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777021#action_12777021
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Rick Hillegas commented on DERBY-791:
-------------------------------------
Committed derby-791-02-aa-printTargetColumnList.diff at subversion revision
835417.
> Expose api for printing Abstract Syntax Trees in production (non-debug)
> servers
> -------------------------------------------------------------------------------
>
> Key: DERBY-791
> URL: https://issues.apache.org/jira/browse/DERBY-791
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Reporter: Rick Hillegas
> Attachments: ASTGrapher.java,
> derby-791-01-aa-fromListAndResultColumnList.diff,
> derby-791-02-aa-printTargetColumnList.diff, XmlTreeWalker.java,
> XmlTreeWalker.java, XmlTreeWalker.java, XmlTreeWalker.java,
> XmlTreeWalker.java, z.xml
>
>
> Currently you can print Abstract Syntax Trees to derby.log by setting the
> DumpParseTree tracepoint at server startup. E.g.:
> java -cp $CLASSPATH -Dderby.debug.true=DumpParseTree
> -Dderby.stream.error.logSeverityLevel=0 org.apache.derby.tools.ij z.sql
> This can be a useful debugging tool. However, it only works on debug servers
> built with the following flags:
> sanity=true
> debug=true
> We should provide some mechanism for printing these trees in production
> (non-debug) servers.
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