Hi folks,
New to airflow, trying to investigate a scenario and looking to know if
there are functionalities in airflow to handle it.

We have 2 dags: *dag_1* and *dag_2*.
*dag_1*: Looks into a sql table and any record for the query we have, picks
the record(ex: some
value in column Id) and trigger *dag_2* by passing it and *dag_1* job is
done and will
be keep running and looking for entries matching the query.

*dag_2*: Does some job with that provided arguments (i.e Id) and this might
take some time to complete.

Now if *dag_1* gets a new record in sql with same value (Id) as
previous(which is valid scenario), it will trigger new *dag_2* run even
while previous run is in progress, this will mess up few things.

Is there are way we can configure that if there is a dag run on-going with
same provided parameter(i.e id in this case), that we skip the new run or
cancel the previous so the new one keeps going.
If provided parameter(i.e id) is different it can keep triggering/run the
*dag_2*, this is only if the Id parameter passed is same as previous.

**Id here means the column value in the sql record pass on as a
parameter/arguments.

Thank You
Vishu

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