Tom Lane <t...@sss.pgh.pa.us> wrote: > I had wondered whether it'd be worth optimizing that along the > lines of slot_getallattrs(). But most indexes probably have only > one column, or anyway not enough to make for a useful savings. >From a heavily-used production database: cir=> select indnatts, count(*) from pg_index group by indnatts order by indnatts; indnatts | count ----------+------- 1 | 200 2 | 684 3 | 155 4 | 76 5 | 43 6 | 13 7 | 2 9 | 1 (8 rows) This includes system table and TOAST table indexes (which seem to have two columns). There are over 400 user tables, each of which has a primary key, so most primary keys in our database are more than one column. -Kevin
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