89 lines
5.2 KiB
Ruby
89 lines
5.2 KiB
Ruby
# frozen_string_literal: true
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class FinalizeTagginsBigintConversion < ActiveRecord::Migration[6.1]
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include Gitlab::Database::MigrationHelpers
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disable_ddl_transaction!
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TABLE_NAME = 'taggings'
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def up
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ensure_batched_background_migration_is_finished(
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job_class_name: 'CopyColumnUsingBackgroundMigrationJob',
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table_name: TABLE_NAME,
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column_name: 'id',
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job_arguments: [%w[id taggable_id], %w[id_convert_to_bigint taggable_id_convert_to_bigint]]
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)
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swap
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end
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def down
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swap
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end
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private
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def swap
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# rubocop:disable Migration/PreventIndexCreation
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add_concurrent_index TABLE_NAME, :id_convert_to_bigint, unique: true, name: 'index_taggings_on_id_convert_to_bigint'
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# This is to replace the existing "index_taggings_on_taggable_id_and_taggable_type" btree (taggable_id, taggable_type)
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add_concurrent_index TABLE_NAME, [:taggable_id_convert_to_bigint, :taggable_type], name: 'i_taggings_on_taggable_id_convert_to_bigint_and_taggable_type'
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# This is to replace the existing "index_taggings_on_taggable_id_and_taggable_type_and_context" btree (taggable_id, taggable_type, context)
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add_concurrent_index TABLE_NAME, [:taggable_id_convert_to_bigint, :taggable_type, :context], name: 'i_taggings_on_taggable_bigint_and_taggable_type_and_context'
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# This is to replace the existing "taggings_idx" btree (tag_id, taggable_id, taggable_type, context, tagger_id, tagger_type)
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add_concurrent_index TABLE_NAME, [:tag_id, :taggable_id_convert_to_bigint, :taggable_type, :context, :tagger_id, :tagger_type], unique: true, name: 'taggings_idx_tmp'
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# This is to replace the existing "tmp_index_taggings_on_id_where_taggable_type_project" btree (id) WHERE taggable_type::text = 'Project'::text
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add_concurrent_index TABLE_NAME, :id_convert_to_bigint, where: "taggable_type = 'Project'", name: 'tmp_index_taggings_on_id_bigint_where_taggable_type_project'
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# rubocop:enable Migration/PreventIndexCreation
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with_lock_retries(raise_on_exhaustion: true) do
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# We'll need ACCESS EXCLUSIVE lock on the related tables,
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# lets make sure it can be acquired from the start
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execute "LOCK TABLE #{TABLE_NAME} IN ACCESS EXCLUSIVE MODE"
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# Swap column names
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temp_name = 'taggable_id_tmp'
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(:taggable_id)} TO #{quote_column_name(temp_name)}"
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(:taggable_id_convert_to_bigint)} TO #{quote_column_name(:taggable_id)}"
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(temp_name)} TO #{quote_column_name(:taggable_id_convert_to_bigint)}"
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temp_name = 'id_tmp'
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(:id)} TO #{quote_column_name(temp_name)}"
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(:id_convert_to_bigint)} TO #{quote_column_name(:id)}"
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execute "ALTER TABLE #{quote_table_name(TABLE_NAME)} RENAME COLUMN #{quote_column_name(temp_name)} TO #{quote_column_name(:id_convert_to_bigint)}"
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# We need to update the trigger function in order to make PostgreSQL to
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# regenerate the execution plan for it. This is to avoid type mismatch errors like
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# "type of parameter 15 (bigint) does not match that when preparing the plan (integer)"
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function_name = Gitlab::Database::UnidirectionalCopyTrigger.on_table(TABLE_NAME, connection: connection).name([:id, :taggable_id], [:id_convert_to_bigint, :taggable_id_convert_to_bigint])
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execute "ALTER FUNCTION #{quote_table_name(function_name)} RESET ALL"
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# Swap defaults
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execute "ALTER SEQUENCE taggings_id_seq OWNED BY #{TABLE_NAME}.id"
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change_column_default TABLE_NAME, :id, -> { "nextval('taggings_id_seq'::regclass)" }
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change_column_default TABLE_NAME, :id_convert_to_bigint, 0
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# Swap PK constraint
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execute "ALTER TABLE #{TABLE_NAME} DROP CONSTRAINT taggings_pkey CASCADE"
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rename_index TABLE_NAME, 'index_taggings_on_id_convert_to_bigint', 'taggings_pkey'
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execute "ALTER TABLE #{TABLE_NAME} ADD CONSTRAINT taggings_pkey PRIMARY KEY USING INDEX taggings_pkey"
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# Rename the index on the `bigint` column to match the new column name
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# (we already hold an exclusive lock, so no need to use DROP INDEX CONCURRENTLY here)
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execute 'DROP INDEX IF EXISTS index_taggings_on_taggable_id_and_taggable_type'
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rename_index TABLE_NAME, 'i_taggings_on_taggable_id_convert_to_bigint_and_taggable_type', 'index_taggings_on_taggable_id_and_taggable_type'
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execute 'DROP INDEX IF EXISTS index_taggings_on_taggable_id_and_taggable_type_and_context'
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rename_index TABLE_NAME, 'i_taggings_on_taggable_bigint_and_taggable_type_and_context', 'index_taggings_on_taggable_id_and_taggable_type_and_context'
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execute 'DROP INDEX IF EXISTS taggings_idx'
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rename_index TABLE_NAME, 'taggings_idx_tmp', 'taggings_idx'
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execute 'DROP INDEX IF EXISTS tmp_index_taggings_on_id_where_taggable_type_project'
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rename_index TABLE_NAME, 'tmp_index_taggings_on_id_bigint_where_taggable_type_project', 'tmp_index_taggings_on_id_where_taggable_type_project'
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end
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end
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end
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