dblink_send_query
dblink_send_query
dblink_send_query - sends an async query to a remote database
Synopsis
dblink_send_query(text connname, text sql) returns int
Description
dblink_send_query
sends a query to be executed
asynchronously, that is, without immediately waiting for the result.
There must not be an async query already in progress on the
connection.
After successfully dispatching an async query, completion status
can be checked with
dblink_is_busy
, and the results
are ultimately collected with
dblink_get_result
.
It is also possible to attempt to cancel an active async query
using
dblink_cancel_query
.
Arguments
-
connname -
Name of the connection to use.
-
sql -
The SQL statement that you wish to execute in the remote database, for example
select * from pg_class.
Return Value
Returns 1 if the query was successfully dispatched, 0 otherwise.
Examples
SELECT dblink_send_query('dtest1', 'SELECT * FROM foo WHERE f1 < 3');