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17 lines
494 B
MySQL
17 lines
494 B
MySQL
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-- Your SQL goes here
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ALTER TABLE comment_seers RENAME TO tmp_comment_seers;
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CREATE TABLE comment_seers (
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id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
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comment_id INTEGER REFERENCES comments(id) ON DELETE CASCADE NOT NULL,
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user_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
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UNIQUE (comment_id, user_id)
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);
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INSERT INTO comment_seers(id, comment_id, user_id)
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SELECT id, comment_id, user_id
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FROM tmp_comment_seers
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WHERE id NOT NULL;
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DROP TABLE tmp_comment_seers;
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