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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
class BuildUserContributedProjectsTable < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
def up
if Gitlab::Database.postgresql?
PostgresStrategy.new
else
MysqlStrategy.new
end.up
end
def down
execute "TRUNCATE user_contributed_projects"
end
private
class PostgresStrategy < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
BATCH_SIZE = 100_000
SLEEP_TIME = 30
def up
with_index(:events, [:author_id, :project_id], name: 'events_user_contributions_temp', where: 'project_id IS NOT NULL') do
iteration = 0
records = 0
begin
Rails.logger.info "Building user_contributed_projects table, batch ##{iteration}"
result = execute <<~SQL
INSERT INTO user_contributed_projects (user_id, project_id)
SELECT e.user_id, e.project_id
FROM (SELECT DISTINCT author_id AS user_id, project_id FROM events WHERE project_id IS NOT NULL) AS e
LEFT JOIN user_contributed_projects ucp USING (user_id, project_id)
WHERE ucp.user_id IS NULL
LIMIT #{BATCH_SIZE}
SQL
iteration += 1
records += result.cmd_tuples
Rails.logger.info "Building user_contributed_projects table, batch ##{iteration} complete, created #{records} overall"
Kernel.sleep(SLEEP_TIME) if result.cmd_tuples > 0
end while result.cmd_tuples > 0
end
execute "ANALYZE user_contributed_projects"
end
private
def with_index(*args)
add_concurrent_index(*args) unless index_exists?(*args)
yield
ensure
remove_concurrent_index(*args) if index_exists?(*args)
end
end
class MysqlStrategy < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
def up
execute <<~SQL
INSERT INTO user_contributed_projects (user_id, project_id)
SELECT e.user_id, e.project_id
FROM (SELECT DISTINCT author_id AS user_id, project_id FROM events WHERE project_id IS NOT NULL) AS e
LEFT JOIN user_contributed_projects ucp USING (user_id, project_id)
WHERE ucp.user_id IS NULL
SQL
end
end
end
|