mirror of https://github.com/citusdata/citus.git
23 lines
772 B
Plaintext
23 lines
772 B
Plaintext
--
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-- MULTI_REPARTITIONED_SUBQUERY_UDF
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--
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SET citus.next_shard_id TO 830000;
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-- Create UDF in master and workers
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\c - - :master_host :master_port
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DROP FUNCTION IF EXISTS median(double precision[]);
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NOTICE: function median(pg_catalog.float8[]) does not exist, skipping
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CREATE FUNCTION median(double precision[]) RETURNS double precision
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LANGUAGE sql IMMUTABLE AS $_$
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SELECT AVG(val) FROM
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(SELECT val FROM unnest($1) val
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ORDER BY 1 LIMIT 2 - MOD(array_upper($1, 1), 2)
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OFFSET CEIL(array_upper($1, 1) / 2.0) - 1) sub;
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$_$;
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SELECT * FROM (SELECT median(ARRAY[1,2,sum(l_suppkey)]) as median, count(*)
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FROM lineitem GROUP BY l_partkey) AS a
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WHERE median > 2;
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median | count
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---------------------------------------------------------------------
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(0 rows)
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