1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# Back-fill project settings for projects that do not yet have one.
class BackfillProjectSettings
include Gitlab::Database::DynamicModelHelpers
def perform(start_id, end_id, batch_table, batch_column, sub_batch_size, pause_ms)
batch_relation = relation_scoped_to_range(batch_table, batch_column, start_id, end_id)
batch_relation.each_batch(column: batch_column, of: sub_batch_size) do |sub_batch|
insert_sql = <<~SQL
INSERT INTO project_settings (project_id, created_at, updated_at)
#{sub_batch.where(project_settings: { project_id: nil })
.select('projects.id, NOW(), NOW()')
.to_sql}
ON CONFLICT (project_id) DO NOTHING
SQL
connection.execute(insert_sql)
pause_ms = 0 if pause_ms < 0
sleep(pause_ms * 0.001)
end
end
private
def connection
ApplicationRecord.connection
end
def relation_scoped_to_range(source_table, source_key_column, start_id, stop_id)
define_batchable_model(:projects, connection: connection)
.where(source_key_column => start_id..stop_id)
.joins("LEFT OUTER JOIN project_settings ON project_settings.project_id = projects.id")
end
end
end
end
|
