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author | Tom Lane <tgl@sss.pgh.pa.us> | 2016-07-03 14:53:37 -0400 |
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committer | Tom Lane <tgl@sss.pgh.pa.us> | 2016-07-03 14:53:46 -0400 |
commit | c89d507649df9fbc21617e02ab4d5e765a28b7df (patch) | |
tree | a6cc92d04c3f43715b10bcd37470ed420ca16be4 /src/backend/executor/nodeModifyTable.c | |
parent | 3a4a33ad49e7887b104a29323e4ea625d164a139 (diff) | |
download | postgresql-c89d507649df9fbc21617e02ab4d5e765a28b7df.tar.gz postgresql-c89d507649df9fbc21617e02ab4d5e765a28b7df.zip |
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.
Diffstat (limited to 'src/backend/executor/nodeModifyTable.c')
0 files changed, 0 insertions, 0 deletions