38 lines
1.4 KiB
MySQL
38 lines
1.4 KiB
MySQL
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ALTER TABLE post ADD COLUMN tag_count INTEGER NOT NULL DEFAULT 0;
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ALTER TABLE post ADD COLUMN fav_count INTEGER NOT NULL DEFAULT 0;
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ALTER TABLE post ADD COLUMN comment_count INTEGER NOT NULL DEFAULT 0;
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UPDATE POST SET tag_count = (SELECT COUNT(*) FROM post_tag WHERE post_id = post.id);
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UPDATE post SET fav_count = (SELECT COUNT(*) FROM favoritee WHERE post_id = post.id);
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UPDATE post SET comment_count = (SELECT COUNT(*) FROM comment WHERE post_id = post.id);
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CREATE TRIGGER post_tag_insert AFTER INSERT ON post_tag FOR EACH ROW
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BEGIN
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UPDATE post SET tag_count = tag_count + 1 WHERE post.id = new.post_id;
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END;
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CREATE TRIGGER post_tag_delete BEFORE DELETE ON post_tag FOR EACH ROW
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BEGIN
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UPDATE post SET tag_count = tag_count - 1 WHERE post.id = old.post_id;
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END;
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CREATE TRIGGER favoritee_insert AFTER INSERT ON favoritee FOR EACH ROW
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BEGIN
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UPDATE post SET fav_count = fav_count + 1 WHERE post.id = new.post_id;
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END;
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CREATE TRIGGER favoritee_delete BEFORE DELETE ON favoritee FOR EACH ROW
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BEGIN
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UPDATE post SET fav_count = fav_count - 1 WHERE post.id = old.post_id;
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END;
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CREATE TRIGGER comment_insert AFTER INSERT ON comment FOR EACH ROW
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BEGIN
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UPDATE post SET comment_count = comment_count + 1 WHERE post.id = new.post_id;
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END;
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CREATE TRIGGER comment_delete BEFORE DELETE ON comment FOR EACH ROW
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BEGIN
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UPDATE post SET comment_count = comment_count - 1 WHERE post.id = old.post_id;
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END;
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