42 lines
727 B
PL/PgSQL
42 lines
727 B
PL/PgSQL
CREATE EXTENSION plpython3u;
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DROP FUNCTION text_pairs;
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CREATE OR REPLACE FUNCTION text_pairs(list TEXT[])
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RETURNS SETOF TEXT[]
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LANGUAGE plpgsql AS
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$$
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DECLARE
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x TEXT;
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y TEXT;
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BEGIN
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for x, y in(
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SELECT *
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FROM unnest(list) a
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CROSS JOIN unnest(list) b
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WHERE a > b)
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LOOP
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RETURN NEXT ARRAY [x, y];
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END LOOP;
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END;
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$$;
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DROP FUNCTION int_pairs;
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CREATE OR REPLACE FUNCTION int_pairs(list INTEGER[])
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RETURNS SETOF INTEGER[]
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LANGUAGE plpgsql AS
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$$
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DECLARE
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x INTEGER;
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y INTEGER;
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BEGIN
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for x, y in(
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SELECT *
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FROM unnest(list) a
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CROSS JOIN unnest(list) b
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WHERE a > b)
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LOOP
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RETURN NEXT ARRAY [x, y];
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END LOOP;
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END;
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$$; |