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(parent: 71baff1) | patch
Fix adjust_semi_join to be more cautious about clauseless joins.
authorTom Lane <tgl@sss.pgh.pa.us>
Tue, 2 Nov 2010 22:45:36 +0000 (18:45 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Tue, 2 Nov 2010 22:45:36 +0000 (18:45 -0400)
commit61d6dd0c03eb4da654f435097cd0bf1da11c3272
tree5e81db71ef307484f356398ad6632b221b753f45tree
parent71baff1786e0c50b514745c64c4b0947b64bf9d0commit | diff
Fix adjust_semi_join to be more cautious about clauseless joins.

It was reporting that these were fully indexed (hence cheap), when of
course they're the exact opposite of that.  I'm not certain if the case
would arise in practice, since a clauseless semijoin is hard to produce
in SQL, but if it did happen we'd make some dumb decisions.
src/backend/optimizer/path/costsize.c diff | blob | blame | history
Kevin Grittner's development, especially fully serializable transactions (See http://wiki.postgresql.org/wiki/Serializable for more info)