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Hinting the planner

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Hello all.

I have some tables that contain exactly 1 row and that I use for searches with 
JOIN.

Does it make any sense to hint the planner about this?
If so, how can I send such hints to it?

-- 
Reg me, please!

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match

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