I want to export the table into a .CSV file using \COPY command. I can able to do that as a stand-alone command. I can't embed the same line inside a function in PostgreSQL. Actually that call should come from a ECPG. I chose \COPY over COPY command as I don't have super-user account! Please guide me on this.
Thanks and Regards,
Siva.
Unfortunately, all of the \ commands are psql commands. You can run psql -E to see what those commands expand into and get sent to the server as, but if you need a super-user account to run COPY, you're going to need a super-user account to do this.
If you are talking about using copy with plpgsql, I think this might help:
Dynamically-generated table-name in PostgreSQL COPY command
Related
I have two DB instances both running PG 9.4
When i issue the COPY command in one it will return with the number of rows affected, however in the second DB which is set up the same it will not.
I see nothing in the config that is different or may affect such. The imports do not error and import successfully on both accounts.
The Documentation states it should return as long as its not stdout.
This line in the documentation looks pertinent, but i'm not sure it applies to my situation.
Do not confuse COPY with the psql instruction \copy. \copy invokes COPY FROM STDIN or COPY TO STDOUT, and then fetches/stores the data in a file accessible to the psql client. Thus, file accessibility and access rights depend on the client rather than the server when \copy is used.
The command i'm issuing is:
COPY [tablename] from '/var/lib/pgsql/datafile.csv'
At the moment i'm down to looking at putty session variables, but i'm not sure this is the way to go.
Does anyone have any ideas as to why this may be happening?
When psql is quiet, it doesn't display these messages.
The quiet mode is activated with -q or \set QUIET on
Example:
test=# copy test to '/tmp/foo';
COPY 8
test=# \set QUIET on
test=# copy test to '/tmp/foo';
test=#
I am making an automated script from terminal that creates a file with the output of \l
But I do not know where the \o command in postgresql prints out the file that it has made. The documentation doesn't inform where.
I did read this, but no luck:
Sincerely
\o points at the named file in current working directory of psql. As you found out, this has some issues in automated environments.
This means you have basically two options:
use absolute paths with \o
Alternatively you can use \cd to set your current working directory inside your psql script.
In your particular case, however, you know that psql -l gives you the same info? That may be easier to manage in an automated environment.
i am trying to execute following unix command but its not getting executed
$array_of_tables= `dbsmp $srv_name`;
print "$array_of_tables\n";
please help me to find out list of tables in a data base through perl scripting.
Also i am trying to copy a file from a path to different path by using following command:-
copy(`cd /osp/slee/service/$srv_name/bin/exec/script.txt`,`cd /osp/local/home/linus/amit/scripts`);
but getting an error:-
Usage: copy(FROM, TO [, BUFFERSIZE])
please provide some solution
Thanks
Use doublequotes instead of back ticks.
copy("/osp/slee/service/$srv_name/bin/exec/script.txt","/osp/local/home/linus/amit/scripts");
and remove the cd
In Perl, the preferable way to capture the output of a system (shell) command is the qx() operator. See http://perldoc.perl.org/perlop.html#Quote-Like-Operators.
$array_of_tables = qx(dbsmp $srv_name);
print("$array_of_tables\n");
Actually, backticks should also work, so the problem must lie with your dbsmp command. I'm not sure what that command is; you'll have to provide more information about the utility and what error you're seeing.
For comparison, I can retrieve the list of tables in my local postgres database as a pipe-separated table using this shell command:
> psql -tAXq main postgres <<<\\d;
And this can be run from Perl as follows:
> perl -e 'print(qx(psql -tAXq main postgres <<<\\\\d;));'
We were trying to use the \COPY command in Knex.raw. We connect via heroku/postgres and the \COPY is the only way to bulk import data as we don't have superuser rights. The backslash before the copy is being removed or multiplied depending on what you try.
So far we've tried to escape it using
1. \b
2. \
3. String.fromCharCode(92)
4. concatenation
The full function we're using is...
knex.raw("\COPY tablename (column1, column2, ...columnN) FROM STDIN " + csvValues).then(function(response){
console.log('the response from the copy', response);
});
We've tested this exact function within our pg:psql environment and it works perfectly. If you know of a better way of doing this, please let us know!
Regards,
Brandon
\copy is a psql (client) command, which wraps Postgres's COPY (server). It sounds like perhaps you're trying to combine the two, and that's where the problem is.
Since knex.js is a query builder, it wouldn't know about \copy -- \COPY would not be valid SQL to use in a client scenario.
You mention that you don't have superuser access, which, if you want to reference a file, is required for COPY.
If you're unable to use COPY for that reason, you would instead need to use psql and leverage its \copy command, for which knex.js would likely not be the tool to use. Rather, you would need to access it via the invocation of a shell command.
Perhaps this batch import of data could be done outside of Javascript entirely? i.e. via a bash script that used psql directly?
In linux I can do something like this:
mysql -u user -p=pass somedb <(echo "create database foo;")
How can I do that with windows batch scripts?
Basically, I want to make a batch file that runs a sql script without having to keep the script in a separate file.
Thanks
One way is to echo the SQL commands into a file, run the mysql command with option to include the SQL file, and then remove the file (if you really don't want it.)
You can do
echo create database foo;|mysql ...
just fine, but for multiple lines you really want to make a temporary file you just pass to MySQL to read.