
On change I6c30a6be750f6b9ecff7399dbb0aea66cdc097da we increased the `resource` column of the quota_usages table from 255 to 300, because its value is constructed from (prefix + volume_type_name), but the length of `volume_type_name` can be up to 255 characters, so if we add a prefix such as 'volumes_' or 'gigabytes_' to it we'll exceed the db length limit of the `resource` column. There are other 3 quota related tables (quotas, quota_classes, reservations) that have a `resource` column, and they are all referencing the same kind of thing, but they still have a maximum size of 255 characters, so there will be things that we won't be able to do when using a volume type with a 255 characters name. Some of the operations we won't be able to do are setting a default quota limit for it or migrate volumes using that volume type. Related-Bug: #1798327 Related-Bug: #1608849 Closes-Bug: #1948962 Change-Id: I40546b20322443dc34556de4aababf33a230db78
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