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Fix adding column with default value taking longer on Postgres >= 11 (#26375)

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Eugen Rochko 2023-08-08 09:09:58 +02:00 committed by GitHub
parent dbef3050e0
commit 5b7c925573
1 changed files with 13 additions and 1 deletions
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14
lib/mastodon/migration_helpers.rb
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@ -195,7 +195,14 @@ module Mastodon
def supports_drop_index_concurrently?
version = select_one("SELECT current_setting('server_version_num') AS v")['v'].to_i
version >= 90200
version >= 90_200
end
# Only available on Postgresql >= 11
def supports_add_column_with_default?
version = select_one("SELECT current_setting('server_version_num') AS v")['v'].to_i
version >= 11_000
end
# Adds a foreign key with only minimal locking on the tables involved.
@ -414,6 +421,11 @@ module Mastodon
# This method can also take a block which is passed directly to the
# `update_column_in_batches` method.
def add_column_with_default(table, column, type, default:, limit: nil, allow_null: false, &block)
if supports_add_column_with_default?
add_column(table, column, type, default: default, limit: limit, null: allow_null)
return
end
if transaction_open?
raise 'add_column_with_default can not be run inside a transaction, ' \
'you can disable transactions by calling disable_ddl_transaction! ' \