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# frozen_string_literal: true
class IndexLabelsUsingVarcharPatternOps < Gitlab::Database::Migration[1.0]
disable_ddl_transaction!
NEW_TITLE_INDEX_NAME = 'index_labels_on_title_varchar'
NEW_PROJECT_ID_TITLE_INDEX_NAME = 'index_labels_on_project_id_and_title_varchar_unique'
NEW_GROUP_ID_TITLE_INDEX_NAME = 'index_labels_on_group_id_and_title_varchar_unique'
NEW_GROUP_ID_INDEX_NAME = 'index_labels_on_group_id'
OLD_TITLE_INDEX_NAME = 'index_labels_on_title'
OLD_PROJECT_ID_TITLE_INDEX_NAME = 'index_labels_on_project_id_and_title_unique'
OLD_GROUP_ID_TITLE_INDEX_NAME = 'index_labels_on_group_id_and_title_unique'
OLD_GROUP_ID_PROJECT_ID_TITLE_INDEX_NAME = 'index_labels_on_group_id_and_project_id_and_title'
def up
add_concurrent_index :labels, :title, order: { title: :varchar_pattern_ops }, name: NEW_TITLE_INDEX_NAME
add_concurrent_index :labels, [:project_id, :title], where: "labels.group_id IS NULL", unique: true, order: { title: :varchar_pattern_ops }, name: NEW_PROJECT_ID_TITLE_INDEX_NAME
add_concurrent_index :labels, [:group_id, :title], where: "labels.project_id IS NULL", unique: true, order: { title: :varchar_pattern_ops }, name: NEW_GROUP_ID_TITLE_INDEX_NAME
add_concurrent_index :labels, :group_id, name: NEW_GROUP_ID_INDEX_NAME
remove_concurrent_index_by_name :labels, OLD_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, OLD_PROJECT_ID_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, OLD_GROUP_ID_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, OLD_GROUP_ID_PROJECT_ID_TITLE_INDEX_NAME
end
def down
add_concurrent_index :labels, :title, name: OLD_TITLE_INDEX_NAME
add_concurrent_index :labels, [:project_id, :title], where: "labels.group_id IS NULL", unique: true, name: OLD_PROJECT_ID_TITLE_INDEX_NAME
add_concurrent_index :labels, [:group_id, :title], where: "labels.project_id IS NULL", unique: true, name: OLD_GROUP_ID_TITLE_INDEX_NAME
add_concurrent_index :labels, [:group_id, :project_id, :title], unique: true, name: OLD_GROUP_ID_PROJECT_ID_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, NEW_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, NEW_PROJECT_ID_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, NEW_GROUP_ID_TITLE_INDEX_NAME
remove_concurrent_index_by_name :labels, NEW_GROUP_ID_INDEX_NAME
end
end
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