Avoid exhausting type ids due to transaction rollbacks #435
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lvonk
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Dec 20, 2024
erikrozendaal
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Type ids (for aggregate, command, and event types) use the `SMALLINT` data type to optimize storage usage. However, when a sequence is used to generated ids the ids can be dropped on transaction rollback. This can cause the ids to be quickly exhausted when something is misconfigured. This change uses the highest id + 1 for the next id. This is slow and requires table locking, but since new types are rarely added this should not impact normal performance.
Note that updating the type tables is a very rare occurence (only when new code is deployed and the new types are committed to the event store) so locking these tables should not be a performance bottleneck in the normal case.
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Type ids (for aggregate, command, and event types) use the
SMALLINTdata type to optimize storage usage. However, when a sequence is used to generated ids the ids can be dropped on transaction rollback. This can cause the ids to be quickly exhausted when something is misconfigured.This change uses the highest id + 1 for the next id. This is slow and requires table locking, but since new types are rarely added this should not impact normal performance.