sqlalchemy insert or ignore

insert ignore

# insert ignore
insert_stmt = TimePoint.__table__.insert().prefix_with(" ignore").values(data)
session.execute(insert_stmt)

# insert on duplicate update
insert_stmt = mysql.insert(TaskInstance).values(**data)
on_duplicate_key_stmt = insert_stmt.on_duplicate_key_update(
    {"start_dt": start_dt, "end_dt": end_dt})
session.execute(on_duplicate_key_stmt)

https://github.com/pallets/flask-sqlalchemy/issues/241

https://docs.sqlalchemy.org/en/14/changelog/migration_12.html#support-for-insert-on-duplicate-key-update

https://stackoverflow.com/questions/46654221/sqlalchemy-core-insert-ignore-and-on-duplicate-key-update

https://stackoverflow.com/questions/2218304/sqlalchemy-insert-ignore

https://stackoverflow.com/questions/39256258/how-do-i-tell-sqlalchemy-to-ignore-certain-say-null-columns-on-insert