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authorTom Lane <tgl@sss.pgh.pa.us>2013-03-31 18:33:07 -0400
committerTom Lane <tgl@sss.pgh.pa.us>2013-03-31 18:34:44 -0400
commitad480bd25308933153dc323af3678254a06eec5a (patch)
tree08944eaea08bf813476b933ccecab0184b0508a2 /src/tutorial/basics.source
parent861aac58708db46c105299ac854b448e756aee1a (diff)
downloadpostgresql-ad480bd25308933153dc323af3678254a06eec5a.tar.gz
postgresql-ad480bd25308933153dc323af3678254a06eec5a.zip
Ignore extra subquery outputs in set_subquery_size_estimates().
In commit 0f61d4dd1b4f95832dcd81c9688dac56fd6b5687, I added code to copy up column width estimates for each column of a subquery. That code supposed that the subquery couldn't have any output columns that didn't correspond to known columns of the current query level --- which is true when a query is parsed from scratch, but the assumption fails when planning a view that depends on another view that's been redefined (adding output columns) since the upper view was made. This results in an assertion failure or even a crash, as per bug #8025 from lindebg. Remove the Assert and instead skip the column if its resno is out of the expected range.
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