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Backpatch-through: certain files through 9.4
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Backpatch-through: certain files through 9.3
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Backpatch certain files through 9.1
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Backpatch certain files through 9.0
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Update all files in head, and files COPYRIGHT and legal.sgml in all back
branches.
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Fully update git head, and update back branches in ./COPYRIGHT and
legal.sgml files.
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Run on HEAD and 9.2.
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We should generally use left-recursion not right-recursion to parse lists.
Bison hasn't got any built-in way to check for this type of inefficiency,
and I didn't find anything on the net in a quick search, so I wrote a
little Perl script to do it. Add to src/tools/ so we don't have to
re-invent this wheel next time we wonder if we're doing anything stupid.
Currently, the only place that seems to need fixing is plpgsql's stmt_else
production, so the problem doesn't appear to be common enough to warrant
trying to include such a test in our standard build process. If we did
want to do that, we'd need a way to ignore some false positives, such as
a_expr := '-' a_expr
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