118 lines
4.6 KiB
Ruby
118 lines
4.6 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module AsyncIndexes
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module MigrationHelpers
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def unprepare_async_index(table_name, column_name, **options)
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Gitlab::Database::QueryAnalyzers::RestrictAllowedSchemas.require_ddl_mode!
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return unless async_index_creation_available?
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index_name = options[:name] || index_name(table_name, column_name)
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raise 'Specifying index name is mandatory - specify name: argument' unless index_name
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unprepare_async_index_by_name(table_name, index_name)
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end
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def unprepare_async_index_by_name(table_name, index_name, **options)
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Gitlab::Database::QueryAnalyzers::RestrictAllowedSchemas.require_ddl_mode!
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return unless async_index_creation_available?
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PostgresAsyncIndex.find_by(name: index_name).try do |async_index|
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async_index.destroy!
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end
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end
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# Prepares an index for asynchronous creation.
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#
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# Stores the index information in the postgres_async_indexes table to be created later. The
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# index will be always be created CONCURRENTLY, so that option does not need to be given.
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# If an existing asynchronous definition exists with the same name, the existing entry will be
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# updated with the new definition.
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#
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# If the requested index has already been created, it is not stored in the table for
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# asynchronous creation.
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def prepare_async_index(table_name, column_name, **options)
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Gitlab::Database::QueryAnalyzers::RestrictAllowedSchemas.require_ddl_mode!
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return unless async_index_creation_available?
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index_name = options[:name] || index_name(table_name, column_name)
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raise 'Specifying index name is mandatory - specify name: argument' unless index_name
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options = options.merge({ algorithm: :concurrently })
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if index_exists?(table_name, column_name, **options)
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Gitlab::AppLogger.warn(
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message: 'Index not prepared because it already exists',
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table_name: table_name,
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index_name: index_name)
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return
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end
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index, algorithm, if_not_exists = add_index_options(table_name, column_name, **options)
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create_index = ActiveRecord::ConnectionAdapters::CreateIndexDefinition.new(index, algorithm, if_not_exists)
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schema_creation = ActiveRecord::ConnectionAdapters::PostgreSQL::SchemaCreation.new(ApplicationRecord.connection)
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definition = schema_creation.accept(create_index)
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async_index = PostgresAsyncIndex.find_or_create_by!(name: index_name) do |rec|
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rec.table_name = table_name
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rec.definition = definition
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end
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async_index.definition = definition
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async_index.save! # No-op if definition is not changed
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Gitlab::AppLogger.info(
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message: 'Prepared index for async creation',
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table_name: async_index.table_name,
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index_name: async_index.name)
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async_index
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end
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# Prepares an index for asynchronous destruction.
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#
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# Stores the index information in the postgres_async_indexes table to be removed later. The
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# index will be always be removed CONCURRENTLY, so that option does not need to be given.
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#
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# If the requested index has already been removed, it is not stored in the table for
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# asynchronous destruction.
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def prepare_async_index_removal(table_name, column_name, options = {})
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index_name = options.fetch(:name)
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raise 'prepare_async_index_removal must get an index name defined' if index_name.blank?
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unless index_exists?(table_name, column_name, **options)
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Gitlab::AppLogger.warn "Index not removed because it does not exist (this may be due to an aborted migration or similar): table_name: #{table_name}, index_name: #{index_name}"
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return
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end
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definition = "DROP INDEX CONCURRENTLY #{quote_column_name(index_name)}"
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async_index = PostgresAsyncIndex.find_or_create_by!(name: index_name) do |rec|
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rec.table_name = table_name
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rec.definition = definition
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end
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Gitlab::AppLogger.info(
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message: 'Prepared index for async destruction',
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table_name: async_index.table_name,
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index_name: async_index.name
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)
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async_index
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end
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def async_index_creation_available?
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connection.table_exists?(:postgres_async_indexes)
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end
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end
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end
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end
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end
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