Bruce Momjian <[EMAIL PROTECTED]> writes:
> Simon Riggs wrote:
>> Reason for no documentation was that CREATE INDEX and CREATE TABLE AS
>> SELECT already use this optimisation, but to my knowledge neither was/is
>> documented on those command pages.
> I wasn't aware those used the optimization. Seems they all should be
> documented somewhere.
We don't document every single optimization in the system ... if we did,
the docs would be as big as the source code and equally unreadable by
non-programmers. I think it's a much better idea just to mention it one
place and not try to enumerate exactly which commands have the optimization.
regards, tom lane
---------------------------(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
