Hi Suresh, Thanks! I haven't always had success clicking on the "I" button on the menu bar. So that may be buggy. But I didn't know about right-clicking on the RE nodes. I'll give that a try.
Dave -----Original Message----- From: Suresh Subbiah [mailto:[email protected]] Sent: Wednesday, November 4, 2015 4:59 PM To: [email protected] Subject: Re: Good ways to see query trees during compilation? Hi Dave, The "I" (Capital i) button in display should work. ItemExpr tree can also be seen by right clicking on a RelExpr and choosing ItemExpr from the drop down menu (three choices in the menu I think). One can oonly see ItemExpr trees at the end of major compiler phases though with DISPLAY. Also maybe not all ItemExpr trees of a RelExpr are displayed, only the ones the tool is is aware of. Thanks Suresh On Tue, Nov 3, 2015 at 6:53 PM, Hans Zeller <[email protected]> wrote: > Hi Dave, > > Many years ago, we used to have a method ExprNode::displayTree() that > would invoke the GUI display tool from the debugger, so you could look > at a tree not just at the end of each phase but also in-between. It > looks like the current GUI does not support this feature, but maybe we > could try to bring it back. I don't know how much work that would be. > > Hans > > On Tue, Nov 3, 2015 at 3:47 PM, Dave Birdsall > <[email protected]> > wrote: > > > Hi, > > > > > > > > I’ve been debugging some issues in the Trafodion compiler where the > > fix involves transforming the query tree in a certain way. One issue > > I’m running into is getting the transformation right. What would be > > really helpful is some utility that would show the details of a tree > > (the > RelExpr > > nodes and all the dangling ItemExpr subtrees under it, complete with > > ValueIDs) so I could compare my transformation with other > transformations; > > that is, so I can get a visual picture of what a good transformation > looks > > like. > > > > > > > > I have been using the DISPLAY utility, but it doesn’t seem to show > > the ItemExpr subtrees. Perhaps there’s a bug in there that needs to be > > fixed? > > > > > > > > The ItemExpr nodes have a display() method that is handy to call > > from > gdb. > > If I could have something like that on RelExpr nodes as well, and > > with ValueIDs added in all the ItemExpr nodes, that would be great, I > > think. > > > > > > > > Perhaps this capability exists and I just haven’t stumbled upon it yet? > > > > > > > > Thanks for any suggestions, > > > > > > > > Dave > > >
