> For larger tables, you may have to resort to a
> union:
>
> select * from foo where name != 'Other' order by name
> union
> select * from foo where name = 'Other'
Alas, this suggestion is wrong on two counts: (a) UNION expects a single
ORDER BY that applies to the whole recordset and which has to come at
the end; (b) UNION re-sorts anyway (it needs to eliminate the dupes) --
maybe you are thinking UNION ALL? So, to follow your advice he may want
a query like this, although it seems quite silly and there still isn't
an ironclad guarantee re. the final result sorting:
select * from
(select * from foo where name != 'Other' order by name) x
union all
select * from foo where name = 'Other'
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
