12 lines
273 B
MySQL
12 lines
273 B
MySQL
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WITH indexed_posts AS (
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SELECT
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post_id,
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ROW_NUMBER() OVER (PARTITION BY thread_id ORDER BY board_post_id) AS index
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FROM
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posts
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)
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UPDATE posts
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SET local_idx = indexed_posts.index
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FROM indexed_posts
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WHERE posts.post_id = indexed_posts.post_id;
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