nodeHash.c

25 years ago

Correct oversight in hashjoin cost estimation: nodeHash sizes its hash · 25442d8d

Tom Lane authored 25 years ago

table for an average of NTUP_PER_BUCKET tuples/bucket, but cost_hashjoin
was assuming a target load of one tuple/bucket.  This was causing a
noticeable underestimate of hashjoin costs.

25442d8d

History

Correct oversight in hashjoin cost estimation: nodeHash sizes its hash

Tom Lane authored 25 years ago

table for an average of NTUP_PER_BUCKET tuples/bucket, but cost_hashjoin
was assuming a target load of one tuple/bucket.  This was causing a
noticeable underestimate of hashjoin costs.

nodeHash.c 18.96 KiB