24 lines
1.3 KiB
Elixir
24 lines
1.3 KiB
Elixir
defmodule Pleroma.Repo.Migrations.RenameIndexUsersApId_COALESCEFollowerAddressIndex do
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alias Pleroma.Repo
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use Ecto.Migration
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def up do
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# By default Postgresql first restores the data and then the indexes when dumping and restoring the database.
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# Restoring index activities_visibility_index took a very long time.
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# users_ap_id_COALESCE_follower_address_index was later added because having this could speed up the restoration tremendously.
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# The problem now is that restoration apparently happens in alphabetical order, so this new index wasn't created yet
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# by the time activities_visibility_index needed it.
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# There were several work-arounds which included more complex steps during backup/restore.
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# By renaming this index, it should be restored first and thus activities_visibility_index can make use of it.
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# This speeds up restoration significantly without requiring more complex or unexpected steps from people.
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Repo.query!("ALTER INDEX public.\"users_ap_id_COALESCE_follower_address_index\"
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RENAME TO \"aa_users_ap_id_COALESCE_follower_address_index\";")
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end
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def down do
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Repo.query!("ALTER INDEX public.\"aa_users_ap_id_COALESCE_follower_address_index\"
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RENAME TO \"users_ap_id_COALESCE_follower_address_index\";")
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end
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end
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