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dblink_send_query
Name
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.
Example
SELECT dblink_send_query('dtest1', 'SELECT * FROM foo WHERE f1 < 3');