72 lines
4.6 KiB
Ruby
72 lines
4.6 KiB
Ruby
#
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# Copyright (C) 2012 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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class IndexCleanupPt1 < ActiveRecord::Migration[4.2]
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tag :predeploy
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# cleaning up unused and inefficient indexes
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def self.up
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if connection.adapter_name =~ /postgres/i
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# most attachments have a root_attachment_id of null, which we never query by directly
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# we *do* query by (context_type, context_id, file_state where root_attachment_id = null),
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# but that uses the context index.
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# so, we'll restrict this index to just non-null root_attachment_ids.
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execute %{create index index_attachments_on_root_attachment_id_not_null on #{Attachment.quoted_table_name} (root_attachment_id) where root_attachment_id is not null}
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remove_index "attachments", :name => "index_attachments_on_root_attachment_id"
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end
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# these are unused and heavily updated, so great targets for dropping
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remove_index "attachments", :name => "index_attachments_on_scribd_account_id"
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remove_index "enrollments", :name => "index_enrollments_on_sis_source_id"
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remove_index "courses", :name => "index_courses_on_grading_standard_id"
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remove_index "courses", :name => "index_courses_on_wiki_id"
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remove_index "messages", :name => "index_messages_on_asset_context_id_and_asset_context_type"
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remove_index "messages", :name => "index_messages_on_notification_name_workflow_state_created_at"
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remove_index "messages", :name => "index_messages_on_sa_ui_te_nc"
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remove_index "messages", :name => "index_messages_on_workflow_state_and_dispatch_at"
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remove_index "pseudonyms", :name => "index_pseudonyms_on_communication_channel_id"
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remove_index "assignment_groups", :name => "index_assignment_groups_on_context_code"
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remove_index "assessment_questions", :name => "index_assessment_questions_on_context_id_and_context_type"
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remove_index "assignments", :name => "index_assignments_on_workflow_state"
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remove_index "submissions", :name => "aid_submission_type_process_attempts"
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remove_index "submissions", :name => "index_submissions_on_grader_id"
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remove_index "submissions", :name => "index_submissions_on_group_id"
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end
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def self.down
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if connection.adapter_name =~ /postgres/i
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remove_index "attachments", :name => "index_attachments_on_root_attachment_id_not_null"
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add_index "attachments", ["root_attachment_id"], :name => "index_attachments_on_root_attachment_id"
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end
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add_index "attachments", ["scribd_account_id"], :name => "index_attachments_on_scribd_account_id"
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add_index "enrollments", ["sis_source_id"], :name => "index_enrollments_on_sis_source_id"
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add_index "courses", ["grading_standard_id"], :name => "index_courses_on_grading_standard_id"
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add_index "courses", ["wiki_id"], :name => "index_courses_on_wiki_id"
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add_index "messages", ["asset_context_id", "asset_context_type"], :name => "index_messages_on_asset_context_id_and_asset_context_type"
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add_index "messages", ["notification_name", "workflow_state", "created_at"], :name => "index_messages_on_notification_name_workflow_state_created_at"
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add_index "messages", ["sent_at", "to_email", "user_id", "notification_category"], :name => "index_messages_on_sa_ui_te_nc"
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add_index "messages", ["workflow_state", "dispatch_at"], :name => "index_messages_on_workflow_state_and_dispatch_at"
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add_index "pseudonyms", ["communication_channel_id"], :name => "index_pseudonyms_on_communication_channel_id"
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add_index "assignment_groups", ["context_code"], :name => "index_assignment_groups_on_context_code"
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add_index "assessment_questions", ["context_id", "context_type"], :name => "index_assessment_questions_on_context_id_and_context_type"
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add_index "assignments", ["workflow_state"], :name => "index_assignments_on_workflow_state"
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add_index "submissions", ["attachment_id", "submission_type", "process_attempts"], :name => "aid_submission_type_process_attempts"
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add_index "submissions", ["grader_id"], :name => "index_submissions_on_grader_id"
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add_index "submissions", ["group_id"], :name => "index_submissions_on_group_id"
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end
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end
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