-- Ported from the SQLite migration of the same number.
-- Answers to similar questions, for a project that asks: the cosine
-- similarity a question must reach to another's to be given its answer.
-- 0 is off, and only the same request is answered again. The questions and
-- answers are held in each gateway's memory, never here.
ALTER TABLE projects ADD COLUMN cache_similar DOUBLE PRECISION NOT NULL DEFAULT 0;