Backport to 2.28.x: #10257: Reuse existing dimension_slice ids when possible - #10264
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When upgrading to 2.28.x we would rebuild all dimension_slices as slices can no longer be shared. We can completely reuse existing ids for hypertables with only single dimensions and reduce the amount of renumbering for hypertables with multiple dimensions. This reduces the amount of locks takes during extension upgrades. (cherry picked from commit 2a99f01)
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July 15, 2026 13:49
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This is an automated backport of #10257: Reuse existing dimension_slice ids when possible.
This PR will be merged automatically after all the relevant CI checks pass. If this fix should not be backported, or will be backported manually, just close this PR. You can use the backport branch to add your changes, it won't be modified automatically anymore.
For more details, please see the documentation
Original description
Reuse existing dimension_slice ids when possible
When upgrading to 2.28.x we would rebuild all dimension_slices as
slices can no longer be shared. We can completely reuse existing
ids for hypertables with only single dimensions and reduce the
amount of renumbering for hypertables with multiple dimensions.
This reduces the amount of locks takes during extension upgrades.