>       Some ideas :
>       hidden field (like oid was) to indicate in which partition the tuple is 
> ?

tableoid would accomplish that already, assuming that the "partitioned
table" is effectively a view on separate physical tables.

                        regards, tom lane

---------------------------(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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