mirror of
https://github.com/postgres/postgres.git
synced 2025-10-31 10:30:33 +03:00
81 lines
2.2 KiB
Plaintext
81 lines
2.2 KiB
Plaintext
$PostgreSQL: pgsql/contrib/dblink/doc/execute,v 1.4 2006/03/11 04:38:29 momjian Exp $
|
|
==================================================================
|
|
Name
|
|
|
|
dblink_exec -- Executes an UPDATE/INSERT/DELETE on a remote database
|
|
|
|
Synopsis
|
|
|
|
dblink_exec(text connstr, text sql [, bool fail_on_error])
|
|
dblink_exec(text connname, text sql [, bool fail_on_error])
|
|
dblink_exec(text sql [, bool fail_on_error])
|
|
|
|
Inputs
|
|
|
|
connname
|
|
connstr
|
|
|
|
If two arguments are present, the first is first assumed to be a specific
|
|
connection name to use. If the name is not found, the argument is then
|
|
assumed to be a valid connection string, of standard libpq format,
|
|
e.g.: "hostaddr=127.0.0.1 dbname=mydb user=postgres password=mypasswd"
|
|
|
|
If only one argument is used, then the unnamed connection is used.
|
|
|
|
sql
|
|
|
|
sql statement that you wish to execute on the remote host, e.g.:
|
|
insert into foo values(0,'a','{"a0","b0","c0"}');
|
|
|
|
fail_on_error
|
|
|
|
If true (default when not present) then an ERROR thrown on the remote side
|
|
of the connection causes an ERROR to also be thrown locally. If false, the
|
|
remote ERROR is locally treated as a NOTICE, and the return value is set
|
|
to 'ERROR'.
|
|
|
|
Outputs
|
|
|
|
Returns status of the command, or 'ERROR' if the command failed.
|
|
|
|
Notes
|
|
1) dblink_open starts an explicit transaction. If, after using dblink_open,
|
|
you use dblink_exec to change data, and then an error occurs or you use
|
|
dblink_disconnect without a dblink_close first, your change *will* be
|
|
lost.
|
|
|
|
Example usage
|
|
|
|
select dblink_connect('dbname=dblink_test_slave');
|
|
dblink_connect
|
|
----------------
|
|
OK
|
|
(1 row)
|
|
|
|
select dblink_exec('insert into foo values(21,''z'',''{"a0","b0","c0"}'');');
|
|
dblink_exec
|
|
-----------------
|
|
INSERT 943366 1
|
|
(1 row)
|
|
|
|
select dblink_connect('myconn','dbname=regression');
|
|
dblink_connect
|
|
----------------
|
|
OK
|
|
(1 row)
|
|
|
|
select dblink_exec('myconn','insert into foo values(21,''z'',''{"a0","b0","c0"}'');');
|
|
dblink_exec
|
|
------------------
|
|
INSERT 6432584 1
|
|
(1 row)
|
|
|
|
select dblink_exec('myconn','insert into pg_class values (''foo'')',false);
|
|
NOTICE: sql error
|
|
DETAIL: ERROR: null value in column "relnamespace" violates not-null constraint
|
|
|
|
dblink_exec
|
|
-------------
|
|
ERROR
|
|
(1 row)
|