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DBLINK_IS_BUSY(3)       PostgreSQL 9.5.0 Documentation       DBLINK_IS_BUSY(3)

NAME
       dblink_is_busy - checks if connection is busy with an async query

SYNOPSIS
       dblink_is_busy(text connname) returns int

DESCRIPTION
       dblink_is_busy tests whether an async query is in progress.

ARGUMENTS
       connname
           Name of the connection to check.

RETURN VALUE
       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.

EXAMPLES
           SELECT dblink_is_busy('dtest1');

PostgreSQL 9.5.0                     2016                    DBLINK_IS_BUSY(3)