valgog <valgog@gmail.com> wrote .. > On Jul 23, 7:00 pm, t...@sss.pgh.pa.us (Tom Lane) wrote: > > valgog < val...@gmail.com> writes: > > > how to build an multicolumn index with one column order ASCENDING and > > > another column order DESCENDING? > > > > Use 8.3 ;-) > > > > In existing releases you could fake it with a custom reverse-sorting > > operator class, but it's a pain in the neck to create one.
I've often gotten what I want by using a calculated index on (f1, -f2). ORDER BY will take an expression, e.g. ORDER BY f1, -f2. Simpler than a custom operator.
Yes, this is true, but I do now know how to make text order be reversible? There is no - (minus) operator for text value. By now it is not a problem for me, but theoretically I do not see other chance to reverse text fields order...
