forked from fedi/mastodon
Fix adding column with default value taking longer on Postgres >= 11 (#26375)
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@ -195,7 +195,14 @@ module Mastodon
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def supports_drop_index_concurrently?
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version = select_one("SELECT current_setting('server_version_num') AS v")['v'].to_i
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version >= 90200
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version >= 90_200
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end
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# Only available on Postgresql >= 11
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def supports_add_column_with_default?
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version = select_one("SELECT current_setting('server_version_num') AS v")['v'].to_i
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version >= 11_000
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end
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# Adds a foreign key with only minimal locking on the tables involved.
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@ -414,6 +421,11 @@ module Mastodon
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# This method can also take a block which is passed directly to the
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# `update_column_in_batches` method.
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def add_column_with_default(table, column, type, default:, limit: nil, allow_null: false, &block)
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if supports_add_column_with_default?
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add_column(table, column, type, default: default, limit: limit, null: allow_null)
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return
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end
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if transaction_open?
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raise 'add_column_with_default can not be run inside a transaction, ' \
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'you can disable transactions by calling disable_ddl_transaction! ' \
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