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On Thursday 21 October 2004 03:03 pm, Tom Lane wrote:
> "Uwe C. Schroeder" <[EMAIL PROTECTED]> writes:
> > On Thursday 21 October 2004 12:40 pm, Tom Lane wrote:
> >> I don't think that conclusion follows from that premise. In recent
> >> pg_dump versions (any that use a column list with COPY, which I think is
> >> 7.3 or later) there is no fundamental disadvantage to using COPY; it
> >> should be semantically equivalent to INSERT-with-column-list commands.
> >
> > The reason is that I made changes to the schema, i.e. changed the ordinal
> > position of columns and added some columns. Since the positioning of the
> > columns isn't the same anymore a copy will fail.
>
> No, it won't, not if you use a column list.
Ahhh - I see what you mean, thanks for that hint.
A little remark then: the pg_dump manpage (7.4.3) states
--attribute-inserts
Dump data as INSERT commands with explicit column names (INSERT
INTO table (column, ...) VALUES ...). This will make restoration
very slow, but it is necessary if you desire to rearrange the
column ordering.
Maybe that should be fixed then. I was used to do the full insert statements
(ok, I've been using postgres long before it even had SQL) - maybe a old
habit then...
Uwe
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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
