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and, dblink_fetch -- allows ERROR on remote side of connection to throw NOTICE locally instead of ERROR. Also removed documentation for previously deprecated, now removed, functions.
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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