On Monday 13 December 2004 06:55 pm, Richard Huxton wrote:
> Kenneth Gonsalves wrote:
> > hi,
> > how does one replicate the myql 'set' datatype in pg? i tried using
> > 'check', but apparently there is much more to this
>
> You could use a bit-string if you are just tracking set membership, but
> that doesn't exactly duplicate the behaviour. It should be
> straightforward enough to write some support functions and just use a
> text type, but that'd use a lot more storage.
>
> Of course, another table is the accepted way of doing this relationally.
> Are there any particular features you need, or are you just porting an
> application from Mysql?
just porting
kg
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
