mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 02:12:21 +00:00
101 lines
2.7 KiB
SQL
101 lines
2.7 KiB
SQL
SET allow_experimental_bfloat16_type = 1;
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-- This is a smoke test, non exhaustive.
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-- Conversions
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SELECT
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1::BFloat16,
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-1::BFloat16,
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1.1::BFloat16,
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-1.1::BFloat16,
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CAST(1 AS BFloat16),
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CAST(-1 AS BFloat16),
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CAST(1.1 AS BFloat16),
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CAST(-1.1 AS BFloat16),
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CAST(0xFFFFFFFFFFFFFFFF AS BFloat16),
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CAST(-0.0 AS BFloat16),
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CAST(inf AS BFloat16),
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CAST(-inf AS BFloat16),
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CAST(nan AS BFloat16);
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-- Conversions back
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SELECT
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CAST(1.1::BFloat16 AS BFloat16),
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CAST(1.1::BFloat16 AS Float32),
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CAST(1.1::BFloat16 AS Float64),
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CAST(1.1::BFloat16 AS Int8);
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-- Comparisons
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SELECT
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1.1::BFloat16 = 1.1::BFloat16,
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1.1::BFloat16 < 1.1,
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1.1::BFloat16 > 1.1,
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1.1::BFloat16 > 1,
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1.1::BFloat16 = 1.09375;
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-- Arithmetic
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SELECT
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1.1::BFloat16 - 1.1::BFloat16 AS a,
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1.1::BFloat16 + 1.1::BFloat16 AS b,
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1.1::BFloat16 * 1.1::BFloat16 AS c,
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1.1::BFloat16 / 1.1::BFloat16 AS d,
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toTypeName(a), toTypeName(b), toTypeName(c), toTypeName(d);
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SELECT
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1.1::BFloat16 - 1.1 AS a,
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1.1 + 1.1::BFloat16 AS b,
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1.1::BFloat16 * 1.1 AS c,
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1.1 / 1.1::BFloat16 AS d,
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toTypeName(a), toTypeName(b), toTypeName(c), toTypeName(d);
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-- Tables
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DROP TABLE IF EXISTS t;
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CREATE TEMPORARY TABLE t (n UInt64, x BFloat16);
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INSERT INTO t SELECT number, number FROM numbers(10000);
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SELECT *, n = x, n - x FROM t WHERE n % 1000 = 0 ORDER BY n;
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-- Aggregate functions
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SELECT sum(n), sum(x), avg(n), avg(x), min(n), min(x), max(n), max(x), uniq(n), uniq(x), uniqExact(n), uniqExact(x) FROM t;
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-- MergeTree
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DROP TABLE t;
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CREATE TABLE t (n UInt64, x BFloat16) ENGINE = MergeTree ORDER BY n;
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INSERT INTO t SELECT number, number FROM numbers(10000);
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SELECT *, n = x, n - x FROM t WHERE n % 1000 = 0 ORDER BY n;
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SELECT sum(n), sum(x), avg(n), avg(x), min(n), min(x), max(n), max(x), uniq(n), uniq(x), uniqExact(n), uniqExact(x) FROM t;
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-- Distances
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WITH
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arrayMap(x -> toFloat32(x) / 2, range(384)) AS a32,
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arrayMap(x -> toBFloat16(x) / 2, range(384)) AS a16,
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arrayMap(x -> x + 1, a32) AS a32_1,
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arrayMap(x -> x + 1, a16) AS a16_1
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SELECT a32, a16, a32_1, a16_1,
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dotProduct(a32, a32_1), dotProduct(a16, a16_1),
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cosineDistance(a32, a32_1), cosineDistance(a16, a16_1),
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L2Distance(a32, a32_1), L2Distance(a16, a16_1),
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L1Distance(a32, a32_1), L1Distance(a16, a16_1),
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LinfDistance(a32, a32_1), LinfDistance(a16, a16_1),
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LpDistance(a32, a32_1, 5), LpDistance(a16, a16_1, 5)
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FORMAT Vertical;
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-- Introspection
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SELECT 1.1::BFloat16 AS x,
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hex(x), bin(x),
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byteSize(x),
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reinterpretAsUInt16(x), hex(reinterpretAsString(x));
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-- Rounding (this could be not towards the nearest)
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SELECT 1.1::BFloat16 AS x,
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round(x), round(x, 1), round(x, 2), round(x, -1);
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