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-- ================================================================
-- Setup the table
--
SELECT hll_set_output_version(1);
hll_set_output_version
------------------------
1
(1 row)
DROP TABLE IF EXISTS test_lunfjncl;
NOTICE: table "test_lunfjncl" does not exist, skipping
CREATE TABLE test_lunfjncl (
recno SERIAL,
cardinality double precision,
raw_value bigint,
union_compressed_multiset hll
);
-- Copy the CSV data into the table
--
\copy test_lunfjncl (cardinality, raw_value, union_compressed_multiset) from sql/data/cumulative_add_sparse_step.csv with csv header
SELECT COUNT(*) FROM test_lunfjncl;
count
-------
513
(1 row)
-- Test incremental adding.
SELECT curr.recno,
curr.union_compressed_multiset,
hll_add(prev.union_compressed_multiset, hll_hashval(curr.raw_value))
FROM test_lunfjncl prev, test_lunfjncl curr
WHERE curr.recno > 1
AND curr.recno = prev.recno + 1
AND curr.union_compressed_multiset !=
hll_add(prev.union_compressed_multiset, hll_hashval(curr.raw_value))
ORDER BY curr.recno;
recno | union_compressed_multiset | hll_add
-------+---------------------------+---------
(0 rows)
-- Test cardinality of incremental adds.
SELECT curr.recno,
curr.cardinality,
hll_cardinality(hll_add(prev.union_compressed_multiset,
hll_hashval(curr.raw_value)))
FROM test_lunfjncl prev, test_lunfjncl curr
WHERE curr.recno > 1
AND curr.recno = prev.recno + 1
AND curr.cardinality !=
hll_cardinality(hll_add(prev.union_compressed_multiset,
hll_hashval(curr.raw_value)))
ORDER BY curr.recno;
recno | cardinality | hll_cardinality
-------+-------------+-----------------
(0 rows)
DROP TABLE test_lunfjncl;
|
