From 0e2a4d3897ea3c5117b5cc7f91df4821515ef696 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Tue, 8 Aug 2023 09:09:58 +0200
Subject: [PATCH] Fix adding column with default value taking longer on
Postgres >= 11 (#26375)
---
lib/mastodon/migration_helpers.rb | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/lib/mastodon/migration_helpers.rb b/lib/mastodon/migration_helpers.rb
index 5a252b3512..4a43f67c27 100644
--- a/lib/mastodon/migration_helpers.rb
+++ b/lib/mastodon/migration_helpers.rb
@@ -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! ' \