You only want one record to be returned? Tack a LIMIT 1 onto the end of 
the query.

> My problem is deceptively simple: how you read the next record from a
> table based on a given set of values?  In practice, this is difficult to
> implement.  If anybody can suggest a alternative/better way to this, I'm
> all ears.

---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

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