dblink_is_busy - Man Page

dblink_is_busy(text connname) returns int

dblink_is_busy tests whether an async query is in progress.

connname

Name of the connection to check.

Returns 1 if connection is busy, 0 if it is not busy. If this function returns 0, it is guaranteed that dblink_get_result will not block.

SELECT dblink_is_busy('dtest1');