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-- Эксперимент без CTE. CREATE TABLE x AS SELECT * FROM generate_series(0, 99) AS t(i); SELECT * FROM x WHERE i = floor(random() * 100); -- OK. Генерируются случайные целые числа из диапазона [0;99] SELECT (SELECT floor(random() * 100 + 0 * j)::integer) FROM generate_series(0,100) AS t(j); -- FAIL. Куча NULLs. SELECT (SELECT * FROM x WHERE i = floor(random() * 100 + 0 * j)::integer LIMIT 1) AS ss FROM generate_series(0,100) AS t(j);

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