Can someone remind me why date_part() returns a double rather than an
int4? It is just for partial seconds?
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Peter Eisentraut wrote:
> Tom Lane writes:
>
> > Shall we abandon all that work and go back to "any available cast can be
> > applied implicitly"?
> >
> > My vote is "tough, time to fix your SQL code".
>
> That would be a OK if the current behavior conformed to the SQL standard,
> which it doesn't. The standard says that all numerical types are mutually
> assignable, which in my mind translates directly as implicitly castable.
> Additionally, your stance breaks the following SQL compatible and probably
> quite common code:
>
> create table test ( a int extract(year from current_date) );
>
> We aren't abandoning "all that work". Plenty of casts should not be
> implicit because they are structurally guaranteed to lose information. But
> for casts between numerical types it depends on the content at run time.
> Therefore the SQL standard says that the check needs to be at run time.
> We do that already, so I don't see a reason to be more strict here.
>
> --
> Peter Eisentraut peter_e@gmx.net
>
>
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-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
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