A clone creates its target database one request before it copies into it, and
the fork that would name it is written a request after that. Any failure in
between — a pg_dump error, a bad restore, a dropped connection, the source's
roles changing mid-flow — left a registered `wm_fork_*` that no entry names,
and every retry then failed on its name. This predates data table roles.
`create_pg_database` now reclaims such a leftover before creating: only a
`wm_fork_*` database Windmill registered as a data table database and that no
data table or ducklake entry names, in any workspace, archived ones included.
The drop never terminates connections, so a clone still copying into it makes
the reclaim fail instead of being cut off. It is limited to callers who
administer the source — reaching it is not enough, since on a data table
without roles every member reaches it — and anyone else gets the refusal an
existing database always got.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Diego ImbertandClaude Opus 5
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