create or replace
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@ -28,7 +28,7 @@ SQL
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# we need this function for performance reasons
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# we need this function for performance reasons
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execute <<SQL
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execute <<SQL
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CREATE FUNCTION first_unread_topic_for(user_id int)
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CREATE OR REPLACE FUNCTION first_unread_topic_for(user_id int)
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RETURNS timestamp AS
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RETURNS timestamp AS
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$$
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$$
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SELECT COALESCE(first_topic_unread_at, 'epoch'::timestamp)
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SELECT COALESCE(first_topic_unread_at, 'epoch'::timestamp)
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