чт, 10 нояб. 2022 г. в 01:32, Peter J. Holzer <hjp-pg...@hjp.at>:
> On 2022-11-09 12:57:23 -0600, Ron wrote: > > On 11/9/22 10:17, Peter J. Holzer wrote: > > > On 2022-11-07 14:40:40 -0600, Ron wrote: > > > > On 11/7/22 10:57, Вадим Самохин wrote: > > > > I have an application that must copy a local file in csv format > to a > > > > postgres table on a remote host. The closest solution is this > one (https:// > > > > stackoverflow.com/a/9327519/618020). It boils down to > specifying a \copy > > > > meta-command in a psql command: > > > > > > > > psql -U %s -p %s -d %s -f - <<EOT\n here hoes a \copy > meta-command \nEOT\n > > > > > > > > and executing it. But it's quite an unnatural way to write > > > > database code. Has anything changed in the last ten years? > > > > Or, is there a better way to copy file contents in a remote > > > > database? > > > > > > > > > > > > I'd write a small Python script, using the csv module to read the > data and > > > > psycopg2 to load it. > > > If you use insert statements it will be significantly slower (which may > > > not matter for small files or one-off actions). If you use copy_from() > > > you don't have to parse it (but then why use Python at all?) > > > > If OP does not want to embed psql in his app, then he must find a > different > > solution. Python is such an option. > > Invoking a program written in Python is just as hard (or simple) as > invoking a program written in C (psql). But that Python > program is additional code in their project which has to be first > written and then maintained. > > What they probably should do is write the code in the programming > language they are already using for their app. And as I wrote just using > copy (from within their app, not from psql or a python script or > whatever) is probably the simplest solution. But since the OP chose not > to tell us what programming language or library they use, it's hard to > be more specific. > > hp > > -- > _ | Peter J. Holzer | Story must make more sense than reality. > |_|_) | | > | | | h...@hjp.at | -- Charles Stross, "Creative writing > __/ | http://www.hjp.at/ | challenge!" > Fantastic, never thought pdo could have this kind of method -- https://www.php.net/manual/en/pdo.pgsqlcopyfromfile.php! Haven't checked yet, but it seems it does exactly what I need -- and what its name implies! Thanks a lot!
