Public bug reported: Currently the primary key and an additional unique index are configured on the same column. This is why sqlalchemy logs a warning on a database migration displaying following information:
``` /usr/lib/python3/dist-packages/pymysql/cursors.py:170: Warning: (1831, 'Duplicate index `uniq_instances0uuid`. This is deprecated and will be disallowed in a future release') result = self._query(query) ``` (This example is actually taken from the nova output, but looks just the same for Keystone. There actually is the same issue within Nova schemas, see bug https://bugs.launchpad.net/nova/+bug/1641185) From my understanding of the documentation of mysql (see [1] [2]) and postgres (see [3] [4]) a unique constraint, which is created in the first place, automatically creates an index for the column(s). So there should be no need to create an additional index for the same column: ``` Table: ports (https://opendev.org/openstack/neutron/src/commit/732c1dcbc2fe95bc3d8b6a61b124d59595958b4f/neutron/db/models_v2.py#L128) Columns: network_id, mac_address Indexes: Unique Constraint: uniq_ports0network_id0mac_address Index: ix_ports_network_id_mac_address ``` [1] https://dev.mysql.com/doc/refman/8.0/en/create-index.html#create-index-unique [2] https://dev.mysql.com/doc/refman/8.0/en/mysql-indexes.html [3] https://www.postgresql.org/docs/current/ddl-constraints.html#DDL-CONSTRAINTS-UNIQUE-CONSTRAINTS [4] https://www.postgresql.org/docs/current/indexes-types.html ** Affects: neutron Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1988421 Title: Duplicate indexes in table ports of neutron database Status in neutron: New Bug description: Currently the primary key and an additional unique index are configured on the same column. This is why sqlalchemy logs a warning on a database migration displaying following information: ``` /usr/lib/python3/dist-packages/pymysql/cursors.py:170: Warning: (1831, 'Duplicate index `uniq_instances0uuid`. This is deprecated and will be disallowed in a future release') result = self._query(query) ``` (This example is actually taken from the nova output, but looks just the same for Keystone. There actually is the same issue within Nova schemas, see bug https://bugs.launchpad.net/nova/+bug/1641185) From my understanding of the documentation of mysql (see [1] [2]) and postgres (see [3] [4]) a unique constraint, which is created in the first place, automatically creates an index for the column(s). So there should be no need to create an additional index for the same column: ``` Table: ports (https://opendev.org/openstack/neutron/src/commit/732c1dcbc2fe95bc3d8b6a61b124d59595958b4f/neutron/db/models_v2.py#L128) Columns: network_id, mac_address Indexes: Unique Constraint: uniq_ports0network_id0mac_address Index: ix_ports_network_id_mac_address ``` [1] https://dev.mysql.com/doc/refman/8.0/en/create-index.html#create-index-unique [2] https://dev.mysql.com/doc/refman/8.0/en/mysql-indexes.html [3] https://www.postgresql.org/docs/current/ddl-constraints.html#DDL-CONSTRAINTS-UNIQUE-CONSTRAINTS [4] https://www.postgresql.org/docs/current/indexes-types.html To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1988421/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
