postgres

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Tom Lane c89d507649 Round rowcount estimate for a partial path to an integer.

I'd been wondering why I was sometimes seeing fractional rowcount
estimates in parallel-query situations, and this seems to be the
reason.  (You won't see the fractional parts in EXPLAIN, because it
prints rowcounts with %.0f, but they are apparent in the debugger.)
A fractional rowcount is not any saner for a partial path than any
other kind of path, and it's equally likely to break cost estimation
for higher paths, so apply clamp_row_est() like we do in other places.

2016-07-03 14:53:46 -04:00

allpaths.c

Invent min_parallel_relation_size GUC to replace a hard-wired constant.

2016-06-16 13:47:20 -04:00

clausesel.c

Update copyright for 2016

2016-01-02 13:33:40 -05:00

costsize.c

Round rowcount estimate for a partial path to an integer.

2016-07-03 14:53:46 -04:00

equivclass.c

Restore foreign-key-aware estimation of join relation sizes.