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Merge pull request #12950 from nextcloud/backport/12864/stable31

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[stable31] feat(devmanual): Clarify behavior of missing replacement indexes
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rakekniven
2025-03-27 18:40:42 +01:00
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developer_manual/basics/storage/migrations.rst
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@@ -198,6 +198,8 @@ Replacing indices
Similar to adding an index to an existing table, it could be necessary to replace one or more indices with a new one. To avoid a gap between dropping the old indices in a migration and adding the new one through ``AddMissingIndicesEvent``, it is possible to do both at once in ``AddMissingIndicesEvent``.
If none of the previous indices are found, e.g. because they were optional and not created yet, the replacement index will be treated as *missing index*.
.. note:: Make sure to not use the same index name for the new index as for old indices.
.. code-block:: php