Re: Select with qualified join condition / Batch inserts

> SELECT cmp.WELL_INDEX, cmp.COMPOUND, con.CONCENTRATION
>     FROM SCR_WELL_COMPOUND cmp, SCR_WELL_CONCENTRATION con
>     WHERE cmp.BARCODE=con.BARCODE
>         AND cmp.WELL_INDEX=con.WELL_INDEX
>         AND cmp.MAT_ID=con.MAT_ID
>         AND cmp.MAT_ID = 3
>         AND cmp.BARCODE='910125864'
>         AND cmp.ID_LEVEL = 1;

Quick guess - type mismatch forcing sequential scan.  Try some quotes:
         AND cmp.MAT_ID = '3'
         AND cmp.BARCODE='910125864'
         AND cmp.ID_LEVEL = '1';

M