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Tom Lane f4e4b32743 Support RIGHT and FULL OUTER JOIN in hash joins. ... This is advantageous first because it allows us to hash the smaller table regardless of the outer-join type, and second because hash join can be more flexible than merge join in dealing with arbitrary join quals in a FULL join. For merge join all the join quals have to be mergejoinable, but hash join will work so long as there's at least one hashjoinable qual --- the others can be any condition. (This is true essentially because we don't keep per-inner-tuple match flags in merge join, while hash join can do so.) To do this, we need a has-it-been-matched flag for each tuple in the hashtable, not just one for the current outer tuple. The key idea that makes this practical is that we can store the match flag in the tuple's infomask, since there are lots of bits there that are of no interest for a MinimalTuple. So we aren't increasing the size of the hashtable at all for the feature. To write this without turning the hash code into even more of a pile of spaghetti than it already was, I rewrote ExecHashJoin in a state-machine style, similar to ExecMergeJoin. Other than that decision, it was pretty straightforward.		15 years ago
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attnum.h	Remove cvs keywords from all files.	16 years ago
clog.h	Remove cvs keywords from all files.	16 years ago
genam.h	Create core infrastructure for KNNGIST.	15 years ago
gin.h	Support unlogged tables.	15 years ago
gist.h	Rewrite the GiST insertion logic so that we don't need the post-recovery	15 years ago
gist_private.h	Support unlogged tables.	15 years ago
gistscan.h	Remove cvs keywords from all files.	16 years ago
hash.h	Support unlogged tables.	15 years ago
heapam.h	Remove cvs keywords from all files.	16 years ago
hio.h	Remove cvs keywords from all files.	16 years ago
htup.h	Support RIGHT and FULL OUTER JOIN in hash joins.	15 years ago
itup.h	Remove cvs keywords from all files.	16 years ago
multixact.h	Remove cvs keywords from all files.	16 years ago
nbtree.h	Support unlogged tables.	15 years ago
printtup.h	Remove cvs keywords from all files.	16 years ago
reloptions.h	Remove cvs keywords from all files.	16 years ago
relscan.h	Create core infrastructure for KNNGIST.	15 years ago
rewriteheap.h	Improve logging in VACUUM FULL VERBOSE and CLUSTER VERBOSE.	15 years ago
rmgr.h	Remove cvs keywords from all files.	16 years ago
sdir.h	Remove cvs keywords from all files.	16 years ago
skey.h	Create core infrastructure for KNNGIST.	15 years ago
slru.h	Avoid unnecessary public struct declaration in slru.h	15 years ago
subtrans.h	Remove cvs keywords from all files.	16 years ago
sysattr.h	Remove cvs keywords from all files.	16 years ago
transam.h	Remove cvs keywords from all files.	16 years ago
tupconvert.h	Remove cvs keywords from all files.	16 years ago
tupdesc.h	Remove cvs keywords from all files.	16 years ago
tupmacs.h	Remove cvs keywords from all files.	16 years ago
tuptoaster.h	Remove cvs keywords from all files.	16 years ago
twophase.h	Remove cvs keywords from all files.	16 years ago
twophase_rmgr.h	Remove cvs keywords from all files.	16 years ago
valid.h	Remove cvs keywords from all files.	16 years ago
visibilitymap.h	Remove cvs keywords from all files.	16 years ago
xact.h	Remove cvs keywords from all files.	16 years ago
xlog.h	Instrument checkpoint sync calls.	15 years ago
xlog_internal.h	Bump XLOG_PAGE_MAGIC.	15 years ago
xlogdefs.h	Force default wal_sync_method to be fdatasync on Linux.	15 years ago
xlogutils.h	Remove cvs keywords from all files.	16 years ago