September 26, 2024: PostgreSQL 17 Released!
Supported Versions: Current (17) / 16 / 15 / 14 / 13 / 12
Development Versions: devel
Unsupported versions: 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3
This documentation is for an unsupported version of PostgreSQL.
You may want to view the same page for the current version, or one of the other supported versions listed above instead.

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

conname

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');