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339 lines
11 KiB
MySQL
339 lines
11 KiB
MySQL
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-- For each new actions table, transform the table previously used for the most common action type
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-- into the new actions table, which should only change the table's metadata instead of rewriting the
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-- rows
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ALTER TABLE comment_like RENAME TO comment_actions;
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ALTER TABLE community_follower RENAME TO community_actions;
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ALTER TABLE instance_block RENAME TO instance_actions;
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ALTER TABLE person_follower RENAME TO person_actions;
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ALTER TABLE post_read RENAME TO post_actions;
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ALTER TABLE comment_actions RENAME COLUMN published TO liked;
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ALTER TABLE comment_actions RENAME COLUMN score TO like_score;
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ALTER TABLE community_actions RENAME COLUMN published TO followed;
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ALTER TABLE community_actions RENAME COLUMN state TO follow_state;
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ALTER TABLE community_actions RENAME COLUMN approver_id TO follow_approver_id;
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ALTER TABLE instance_actions RENAME COLUMN published TO blocked;
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ALTER TABLE person_actions RENAME COLUMN person_id TO target_id;
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ALTER TABLE person_actions RENAME COLUMN follower_id TO person_id;
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ALTER TABLE person_actions RENAME COLUMN published TO followed;
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ALTER TABLE person_actions RENAME COLUMN pending TO follow_pending;
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ALTER TABLE post_actions RENAME COLUMN published TO read;
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ALTER TABLE comment_actions
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ALTER COLUMN liked DROP NOT NULL,
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ALTER COLUMN liked DROP DEFAULT,
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ALTER COLUMN like_score DROP NOT NULL,
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ADD COLUMN saved timestamptz,
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ADD CONSTRAINT comment_actions_check_liked CHECK ((liked IS NULL) = (like_score IS NULL));
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ALTER TABLE community_actions
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ALTER COLUMN followed DROP NOT NULL,
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ALTER COLUMN followed DROP DEFAULT,
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ALTER COLUMN follow_state DROP NOT NULL,
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ADD COLUMN blocked timestamptz,
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ADD COLUMN became_moderator timestamptz,
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ADD COLUMN received_ban timestamptz,
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ADD COLUMN ban_expires timestamptz,
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ADD CONSTRAINT community_actions_check_followed CHECK ((followed IS NULL) = (follow_state IS NULL) AND NOT (followed IS NULL AND follow_approver_id IS NOT NULL)),
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ADD CONSTRAINT community_actions_check_received_ban CHECK (NOT (received_ban IS NULL AND ban_expires IS NOT NULL));
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ALTER TABLE instance_actions
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ALTER COLUMN blocked DROP NOT NULL,
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ALTER COLUMN blocked DROP DEFAULT;
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ALTER TABLE person_actions
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ALTER COLUMN followed DROP NOT NULL,
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ALTER COLUMN followed DROP DEFAULT,
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ALTER COLUMN follow_pending DROP NOT NULL,
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ADD COLUMN blocked timestamptz,
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ADD CONSTRAINT person_actions_check_followed CHECK ((followed IS NULL) = (follow_pending IS NULL));
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ALTER TABLE post_actions
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ALTER COLUMN read DROP NOT NULL,
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ALTER COLUMN read DROP DEFAULT,
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ADD COLUMN read_comments timestamptz,
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ADD COLUMN read_comments_amount bigint,
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ADD COLUMN saved timestamptz,
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ADD COLUMN liked timestamptz,
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ADD COLUMN like_score smallint,
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ADD COLUMN hidden timestamptz,
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ADD CONSTRAINT post_actions_check_read_comments CHECK ((read_comments IS NULL) = (read_comments_amount IS NULL)),
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ADD CONSTRAINT post_actions_check_liked CHECK ((liked IS NULL) = (like_score IS NULL));
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-- Add actions from other old tables to the new tables
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INSERT INTO comment_actions (person_id, comment_id, saved)
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SELECT
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person_id,
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comment_id,
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published
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FROM
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comment_saved
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ON CONFLICT (person_id,
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comment_id)
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DO UPDATE SET
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saved = excluded.saved;
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INSERT INTO community_actions (person_id, community_id, blocked)
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SELECT
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person_id,
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community_id,
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published
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FROM
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community_block
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ON CONFLICT (person_id,
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community_id)
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DO UPDATE SET
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person_id = excluded.person_id,
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community_id = excluded.community_id,
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blocked = excluded.blocked;
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INSERT INTO community_actions (person_id, community_id, became_moderator)
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SELECT
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person_id,
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community_id,
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published
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FROM
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community_moderator
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ON CONFLICT (person_id,
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community_id)
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DO UPDATE SET
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person_id = excluded.person_id,
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community_id = excluded.community_id,
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became_moderator = excluded.became_moderator;
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INSERT INTO community_actions (person_id, community_id, received_ban, ban_expires)
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SELECT
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person_id,
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community_id,
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published,
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expires
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FROM
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community_person_ban
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ON CONFLICT (person_id,
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community_id)
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DO UPDATE SET
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person_id = excluded.person_id,
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community_id = excluded.community_id,
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received_ban = excluded.received_ban,
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ban_expires = excluded.ban_expires;
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INSERT INTO person_actions (person_id, target_id, blocked)
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SELECT
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person_id,
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target_id,
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published
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FROM
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person_block
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ON CONFLICT (person_id,
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target_id)
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DO UPDATE SET
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person_id = excluded.person_id,
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target_id = excluded.target_id,
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blocked = excluded.blocked;
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INSERT INTO post_actions (person_id, post_id, read_comments, read_comments_amount)
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SELECT
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person_id,
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post_id,
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published,
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read_comments
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FROM
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person_post_aggregates
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ON CONFLICT (person_id,
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post_id)
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DO UPDATE SET
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read_comments = excluded.read_comments,
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read_comments_amount = excluded.read_comments_amount;
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INSERT INTO post_actions (person_id, post_id, hidden)
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SELECT
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person_id,
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post_id,
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published
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FROM
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post_hide
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ON CONFLICT (person_id,
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post_id)
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DO UPDATE SET
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hidden = excluded.hidden;
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INSERT INTO post_actions (person_id, post_id, liked, like_score)
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SELECT
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person_id,
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post_id,
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published,
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score
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FROM
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post_like
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ON CONFLICT (person_id,
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post_id)
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DO UPDATE SET
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liked = excluded.liked,
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like_score = excluded.like_score;
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INSERT INTO post_actions (person_id, post_id, saved)
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SELECT
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person_id,
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post_id,
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published
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FROM
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post_saved
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ON CONFLICT (person_id,
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post_id)
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DO UPDATE SET
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saved = excluded.saved;
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-- Drop old tables
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DROP TABLE comment_saved, community_block, community_moderator, community_person_ban, person_block, person_post_aggregates, post_hide, post_like, post_saved;
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-- Rename associated stuff
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ALTER INDEX comment_like_pkey RENAME TO comment_actions_pkey;
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ALTER INDEX idx_comment_like_comment RENAME TO idx_comment_actions_comment;
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ALTER TABLE comment_actions RENAME CONSTRAINT comment_like_comment_id_fkey TO comment_actions_comment_id_fkey;
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ALTER TABLE comment_actions RENAME CONSTRAINT comment_like_person_id_fkey TO comment_actions_person_id_fkey;
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ALTER INDEX community_follower_pkey RENAME TO community_actions_pkey;
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ALTER INDEX idx_community_follower_community RENAME TO idx_community_actions_community;
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ALTER TABLE community_actions RENAME CONSTRAINT community_follower_community_id_fkey TO community_actions_community_id_fkey;
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ALTER TABLE community_actions RENAME CONSTRAINT community_follower_person_id_fkey TO community_actions_person_id_fkey;
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ALTER TABLE community_actions RENAME CONSTRAINT community_follower_approver_id_fkey TO community_actions_follow_approver_id_fkey;
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ALTER INDEX instance_block_pkey RENAME TO instance_actions_pkey;
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ALTER TABLE instance_actions RENAME CONSTRAINT instance_block_instance_id_fkey TO instance_actions_instance_id_fkey;
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ALTER TABLE instance_actions RENAME CONSTRAINT instance_block_person_id_fkey TO instance_actions_person_id_fkey;
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ALTER INDEX person_follower_pkey RENAME TO person_actions_pkey;
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ALTER TABLE person_actions RENAME CONSTRAINT person_follower_person_id_fkey TO person_actions_target_id_fkey;
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ALTER TABLE person_actions RENAME CONSTRAINT person_follower_follower_id_fkey TO person_actions_person_id_fkey;
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ALTER INDEX post_read_pkey RENAME TO post_actions_pkey;
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ALTER TABLE post_actions RENAME CONSTRAINT post_read_person_id_fkey TO post_actions_person_id_fkey;
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ALTER TABLE post_actions RENAME CONSTRAINT post_read_post_id_fkey TO post_actions_post_id_fkey;
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-- Rename idx_community_follower_published and add filter
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CREATE INDEX idx_community_actions_followed ON community_actions (followed)
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WHERE
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followed IS NOT NULL;
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DROP INDEX idx_community_follower_published;
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-- Restore indexes of dropped tables
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CREATE INDEX idx_community_actions_became_moderator ON community_actions (became_moderator)
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WHERE
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became_moderator IS NOT NULL;
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CREATE INDEX idx_person_actions_person ON person_actions (person_id);
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CREATE INDEX idx_person_actions_target ON person_actions (target_id);
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CREATE INDEX idx_post_actions_person ON post_actions (person_id);
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CREATE INDEX idx_post_actions_post ON post_actions (post_id);
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-- Create new indexes, with `OR` being used to allow `IS NOT NULL` filters in queries to use either column in
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-- a group (e.g. `liked IS NOT NULL` and `like_score IS NOT NULL` both work)
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CREATE INDEX idx_comment_actions_liked_not_null ON comment_actions (person_id, comment_id)
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WHERE
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liked IS NOT NULL OR like_score IS NOT NULL;
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CREATE INDEX idx_comment_actions_saved_not_null ON comment_actions (person_id, comment_id)
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WHERE
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saved IS NOT NULL;
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CREATE INDEX idx_community_actions_followed_not_null ON community_actions (person_id, community_id)
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WHERE
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followed IS NOT NULL OR follow_state IS NOT NULL;
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CREATE INDEX idx_community_actions_blocked_not_null ON community_actions (person_id, community_id)
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WHERE
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blocked IS NOT NULL;
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CREATE INDEX idx_community_actions_became_moderator_not_null ON community_actions (person_id, community_id)
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WHERE
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became_moderator IS NOT NULL;
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CREATE INDEX idx_community_actions_received_ban_not_null ON community_actions (person_id, community_id)
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WHERE
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received_ban IS NOT NULL;
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CREATE INDEX idx_person_actions_followed_not_null ON person_actions (person_id, target_id)
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WHERE
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followed IS NOT NULL OR follow_pending IS NOT NULL;
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CREATE INDEX idx_person_actions_blocked_not_null ON person_actions (person_id, target_id)
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WHERE
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blocked IS NOT NULL;
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CREATE INDEX idx_post_actions_read_not_null ON post_actions (person_id, post_id)
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WHERE
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read IS NOT NULL;
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CREATE INDEX idx_post_actions_read_comments_not_null ON post_actions (person_id, post_id)
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WHERE
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read_comments IS NOT NULL OR read_comments_amount IS NOT NULL;
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CREATE INDEX idx_post_actions_saved_not_null ON post_actions (person_id, post_id)
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WHERE
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saved IS NOT NULL;
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CREATE INDEX idx_post_actions_liked_not_null ON post_actions (person_id, post_id)
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WHERE
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liked IS NOT NULL OR like_score IS NOT NULL;
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CREATE INDEX idx_post_actions_hidden_not_null ON post_actions (person_id, post_id)
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WHERE
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hidden IS NOT NULL;
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-- This index is currently redundant because instance_actions only has 1 action type, but inconsistency
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-- with other tables would make it harder to do everything correctly when adding another action type
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CREATE INDEX idx_instance_actions_blocked_not_null ON instance_actions (person_id, instance_id)
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WHERE
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blocked IS NOT NULL;
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-- Create new statistics for more accurate estimations of how much of an index will be read (e.g. for
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-- `(liked, like_score)`, the query planner might othewise assume that `(TRUE, FALSE)` and `(TRUE, TRUE)`
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-- are equally likely when only `(TRUE, TRUE)` is possible, which would make it severely underestimate
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-- the efficiency of using the index)
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CREATE statistics comment_actions_liked_stat ON (liked IS NULL), (like_score IS NULL)
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FROM comment_actions;
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CREATE statistics community_actions_followed_stat ON (followed IS NULL), (follow_state IS NULL)
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FROM community_actions;
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CREATE statistics person_actions_followed_stat ON (followed IS NULL), (follow_pending IS NULL)
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FROM person_actions;
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CREATE statistics post_actions_read_comments_stat ON (read_comments IS NULL), (read_comments_amount IS NULL)
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FROM post_actions;
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CREATE statistics post_actions_liked_stat ON (liked IS NULL), (like_score IS NULL), (post_id IS NULL)
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FROM post_actions;
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