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fix(databricks): keep the default memtable volume name a single identifier - #12156

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nil68657:fix-databricks-memtable-volume-name
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nil68657:fix-databricks-memtable-volume-name

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Description of changes

The default volume name starts with the local username. A username such
as first.last added a level to the catalog.schema.volume name, so
creating the volume failed with UC_VOLUME_NOT_FOUND. Replace characters
other than letters, digits, _ and - in the username with _.

Issues closed

This PR is a joint contribution from Nilanjan Chatterjee and Claude (Claude Opus 5.5, via Claude Code). Nilanjan chose the issue and directed the work; Claude reproduced the problem, wrote the change, its tests and this description.

Authored by Nilanjan Chatterjee (@nil68657).

…ifier

The default volume name starts with the local username. A username such
as first.last added a level to the catalog.schema.volume name, so
creating the volume failed with UC_VOLUME_NOT_FOUND. Replace characters
other than letters, digits, `_` and `-` in the username with `_`.

Fixes ibis-project#11950

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@github-actions github-actions Bot added tests Issues or PRs related to tests databricks The Databricks backend labels Oct 11, 2026
@deepyaman deepyaman added the maybe-ai Apply to low-effort autonomous PRs to automatically close them. label Oct 12, 2026
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This was marked as potentially AI generated and will be closed now. If this is an error, please provide additional details, make sure to read the docs about contributing and AI.

@github-actions github-actions Bot closed this Oct 12, 2026
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bug: Databricks error when username contains a period

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