Rename instead of delete, feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12363#note_33449374
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@ -1,45 +0,0 @@
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class RemoveDuplicatedVariable < ActiveRecord::Migration
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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if Gitlab::Database.postgresql?
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execute <<~SQL
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DELETE FROM ci_variables var USING (#{duplicated_ids}) dup
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#{join_conditions}
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SQL
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else
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execute <<~SQL
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DELETE var FROM ci_variables var INNER JOIN (#{duplicated_ids}) dup
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#{join_conditions}
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SQL
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end
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end
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def down
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# noop
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end
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def duplicated_ids
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<<~SQL
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SELECT MAX(id) AS id, #{key}, project_id
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FROM ci_variables GROUP BY #{key}, project_id
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SQL
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end
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def join_conditions
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<<~SQL
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WHERE var.key = dup.key
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AND var.project_id = dup.project_id
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AND var.id <> dup.id
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SQL
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end
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def key
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# key needs to be quoted in MySQL
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quote_column_name('key')
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end
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end
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@ -0,0 +1,35 @@
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class RenameDuplicatedVariableKey < ActiveRecord::Migration
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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execute(<<~SQL)
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UPDATE ci_variables SET #{key} = CONCAT(#{key}, #{underscore}, id)
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WHERE id IN (
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SELECT * FROM ( -- MySQL requires an extra layer
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SELECT dup.id FROM ci_variables dup
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INNER JOIN (SELECT max(id) AS id, #{key}, project_id
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FROM ci_variables tmp
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GROUP BY #{key}, project_id) var
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USING (#{key}, project_id) where dup.id <> var.id
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) dummy
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)
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SQL
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end
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def down
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# noop
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end
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def key
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# key needs to be quoted in MySQL
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quote_column_name('key')
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end
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def underscore
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quote('_')
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end
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end
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@ -1,7 +1,7 @@
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require 'spec_helper'
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require Rails.root.join('db', 'migrate', '20170622135451_remove_duplicated_variable.rb')
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require Rails.root.join('db', 'migrate', '20170622135451_rename_duplicated_variable_key.rb')
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describe RemoveDuplicatedVariable, :migration do
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describe RenameDuplicatedVariableKey, :migration do
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let(:variables) { table(:ci_variables) }
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let(:projects) { table(:projects) }
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@ -20,6 +20,15 @@ describe RemoveDuplicatedVariable, :migration do
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it 'correctly remove duplicated records with smaller id' do
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migrate!
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expect(variables.pluck(:id)).to contain_exactly(1, 2, 6, 7, 8)
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expect(variables.pluck(:id, :key)).to contain_exactly(
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[1, 'key1'],
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[2, 'key2'],
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[3, 'keyX_3'],
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[4, 'keyX_4'],
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[5, 'keyY_5'],
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[6, 'keyX'],
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[7, 'key7'],
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[8, 'keyY']
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)
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end
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end
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