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lang-sql
it seems as if the index isn't used at all. That can't be right. Obviously the index is used, because there are two index scans in the plan. It may not be doing the seek you want, but it's still used. What confuses me in the plan and question is that these are both PK indexes. I see no reference to the FK index in plan, which might reduce the cost of the join. But even your index hint was pushing the PK index, and not the FK. Perhaps if you added thenamecolumn as a non-indexed field to the FK index, so that the index covers thevariabletable, you might get different results.