On Thursday, December 19, 2019, Tom Lane <
tgl@sss.pgh.pa.us> wrote:
"David G. Johnston" <david.g.johnston@gmail.com> writes:
> Seems better to simply talk about each form independently:
> If a list of columns is specified, <command>COPY TO</command> will only
> copy the data in the specified columns to the file. <command>COPY
> FROM</command> will, by position (i.e., the number of columns listed must
> match the number of columns in the file), match each file column to the
> named column in the table. Any additional columns present in the table
> will receive their default value.
+1 for separating it like that, but your middle sentence reads awkwardly
to me. How about something like
<command>COPY FROM</command> will match each listed column in the table
to a file column by position (so the number of columns listed must match
the number of columns in the file).
+1
David J.