PostgreSQL 9.4.4 Documentation
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# dblink_is_busy

## 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

`conname`

  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');

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