Hi !
I destroyed my db and created again, 'vacuum' it and seems to be everything
ok.
Now I'm getting this (wich is much better than before). Thanks all !
explain select * from d_cue where clave = '9400001';
NOTICE: QUERY PLAN:
Index Scan using d_cue_clave on d_cue (cost=0.00..1.69 rows=1 width=544)