Question

I am trying to write what should ostensibly, be relative easy SQL queries – yet, I cant seeem to get them to work.

Is it possible to write a query that looks something like this:

select t.name 
  from (select * 
          from mystoredproc(1,2,3) as t) 
 where t.name = 'foobar'

Two problems with the above query:

1) First off all, the statement above dosent work. My db engine (mySQL) complains:

ERROR 1054 (42S22): Unknown column
‘t.name’ in ‘field list’

2) I want to use the returned table t
in a SELF JOIN. However, I dont want
to have to call mystoredproc(…)
again, because it is a VERY
expensive call.

Any one knows how to fix these problems?

BTW, even though I am using mySQL (for now), I would prefer if any proffered SQL snippet was db agnostic (i.e. ANSI SQL)

Answer 1

Replace the ) as t) with ) t, as in

select t.name from (select * from mystoredproc(1,2,3)) t where t.name = 'foobar'

For your second problem: Feed the result from mystoredproc into a temporary table and SELECT from it, then you can make a self join without hassles.