dblink_exec
dblink_exec — executes a command in a remote database
Synopsis
dblink_exec(text connname, text sql [, bool fail_on_error]) returns textdblink_exec(text connstr, text sql [, bool fail_on_error]) returns textdblink_exec(text sql [, bool fail_on_error]) returns text
Description
dblink_exec executes a command (that is, any SQL statement that doesn't return rows) in a remote database.
When twotext arguments are given, the first one is first looked up as a persistent connection's name; if found, the command is executed on that connection. If not found, the first argument is treated as a connection info string as fordblink_connect, and the indicated connection is made just for the duration of this command.
Arguments
connnameName of the connection to use; omit this parameter to use the unnamed connection.
connstrA connection info string, as previously described for
dblink_connect.sqlThe SQL command that you wish to execute in the remote database, for example
insert into foo values(0, 'a', '{"a0","b0","c0"}').fail_on_errorIf true (the default when omitted) 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 reported as a NOTICE, and the function's return value is set to
ERROR.
Return Value
Returns status, either the command's status string orERROR.
Examples
SELECT dblink_connect('dbname=dblink_test_standby'); 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 errorDETAIL: ERROR: null value in column "relnamespace" violates not-null constraint dblink_exec------------- ERROR(1 row)