20 Mar
2009
20 Mar
'09
6:58 p.m.
I have a table with 700million rows, and 14 columns. All doubles. Each column of data have non-unique entries. No indexing. My query: SELECT * FROM bigtable WHERE col4 < 1000 limit 100; took 35 minutes to run. (a) Is this about the average time to run? (b) Should I explicitly index col4? (Website seems to suggest MonetDB takes care of indexing automatically) If so, how much benefit should I expect? Thanks.