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e31193d495
ruleutils.c tries to cope with additions/deletions/renamings of columns in
tables referenced by views, by means of adding machine-generated aliases to
the printed form of a view when needed to preserve the original semantics.
A recent blog post by Marko Tiikkaja pointed out a case I'd missed though:
if one input of a join with USING is itself a join, there is nothing to
stop the user from adding a column of the same name as the USING column to
whichever side of the sub-join didn't provide the USING column. And then
there'll be an error when the view is re-parsed, since now the sub-join
exposes two columns matching the USING specification. We were catching a
lot of related cases, but not this one, so add some logic to cope with it.
Back-patch to 9.3, which is the first release that makes any serious
attempt to cope with such cases (cf commit
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| common | ||
| include | ||
| interfaces | ||
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| pl | ||
| port | ||
| template | ||
| test | ||
| timezone | ||
| tools | ||
| tutorial | ||
| .gitignore | ||
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| DEVELOPERS | ||
| Makefile | ||
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| nls-global.mk | ||
| win32.mak | ||