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74 lines
2.1 KiB
SQL
74 lines
2.1 KiB
SQL
SELECT '1'; -- simple test
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SELECT round(quantileDD(0.01, 0.5)(number), 2) FROM numbers(200);
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SELECT round(quantileDD(0.0001, 0.69)(number), 2) FROM numbers(500);
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SELECT round(quantileDD(0.003, 0.42)(number), 2) FROM numbers(200);
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SELECT round(quantileDD(0.02, 0.99)(number), 2) FROM numbers(500);
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SELECT '2'; -- median is close to 0
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SELECT round(quantileDD(0.01, 0.5)(number), 2)
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FROM
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(
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SELECT arrayJoin([toInt64(number), number - 10]) AS number
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FROM numbers(0, 10)
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);
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SELECT round(quantileDD(0.01, 0.5)(number - 10), 2) FROM numbers(21);
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SELECT '3'; -- all values are negative
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SELECT round(quantileDD(0.01, 0.99)(-number), 2) FROM numbers(1, 500);
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SELECT '4'; -- min and max values of integer types (-2^63, 2^63-1)
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SELECT round(quantileDD(0.01, 0.5)(number), 2)
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FROM
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(
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SELECT arrayJoin([toInt64(number), number - 9223372036854775808, toInt64(number + 9223372036854775798)]) AS number
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FROM numbers(0, 10)
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);
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SELECT '5'; -- min and max values of floating point types
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SELECT round(quantileDD(0.01, 0.42)(number), 2)
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FROM
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(
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SELECT arrayJoin([toFloat32(number), number - 3.4028235e+38, toFloat32(number + 3.4028235e+38)]) AS number
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FROM numbers(0, 10)
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);
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SELECT '6'; -- denormalized floats
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SELECT round(quantileDD(0.01, 0.69)(number), 2)
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FROM
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(
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SELECT arrayJoin([toFloat32(number), number - 1.1754944e-38, toFloat32(number + 1.1754944e-38)]) AS number
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FROM numbers(0, 10)
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);
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SELECT '7'; -- NaNs
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SELECT round(quantileDD(0.01, 0.5)(number), 2)
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FROM
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(
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SELECT arrayJoin([toFloat32(number), NaN * number]) AS number
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FROM numbers(0, 10)
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);
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SELECT '8'; -- sparse sketch
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SELECT round(quantileDD(0.01, 0.75)(number), 2)
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FROM
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(
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SELECT number * 1e7 AS number
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FROM numbers(20)
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);
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SELECT '9'; -- ser/deser
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DROP TABLE IF EXISTS `02919_ddsketch_quantile`;
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CREATE TABLE `02919_ddsketch_quantile`
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ENGINE = Log AS
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SELECT quantilesDDState(0.001, 0.9)(number) AS sketch
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FROM numbers(1000);
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INSERT INTO `02919_ddsketch_quantile` SELECT quantilesDDState(0.001, 0.9)(number + 1000)
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FROM numbers(1000);
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SELECT arrayMap(a -> round(a, 2), (quantilesDDMerge(0.001, 0.9)(sketch)))
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FROM `02919_ddsketch_quantile`;
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