13 lines
550 B
SQL
13 lines
550 B
SQL
-- This migration extracts "remind days ahead" into a separate table so that a chat can configure mutiple reminders
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CREATE TABLE reminder (
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id INTEGER PRIMARY KEY NOT NULL,
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chat_id INTEGER NOT NULL REFERENCES chat (id) ON DELETE CASCADE,
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days_ahead BIGINT NOT NULL
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);
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CREATE INDEX reminders_chat_id ON reminder (chat_id, days_ahead); -- Having days_ahead as index saves us from taking extra effort for sorted data
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INSERT INTO reminder (chat_id, days_ahead) SELECT id, remind_days_ahead FROM chat;
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ALTER TABLE chat DROP remind_days_ahead; |