Alvaro Herrera <[EMAIL PROTECTED]> writes:
> Interesting. I wonder why the function is not defined instead with OUT
> parameters.
Because bootstrap mode isn't capable of dealing with array columns,
so you can't define stuff in pg_proc.h that sets up an array of OUT
parameter types. I tried to apply that idea for the pg_locks function
a month or two ago, but it blew up in my face :-(.
It'd be nice to fix this sometime, but not while we are so far past
feature freeze.
regards, tom lane
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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
