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