Examples with TDigest com.facebook.presto.tdigest.TDigest used on opensource projects

Example 26 with TDigest

use of com.facebook.presto.tdigest.TDigest in project presto by prestodb.

the class TestTDigestFunctions method testScaleNegative.

@Test(expectedExceptions = PrestoException.class, expectedExceptionsMessageRegExp = "Scale factor should be positive\\.")
public void testScaleNegative() {
    TDigest tDigest = createTDigest(STANDARD_COMPRESSION_FACTOR);
    addAll(tDigest, 0.0d, 1.0d, 2.0d, 3.0d, 4.0d, 5.0d, 6.0d, 7.0d, 8.0d, 9.0d);
    functionAssertions.selectSingleValue(format("scale_tdigest(CAST(X'%s' AS tdigest(double)), -1)", new SqlVarbinary(tDigest.serialize().getBytes()).toString().replaceAll("\\s+", " ")), TDIGEST_DOUBLE, SqlVarbinary.class);
}

Example 27 with TDigest

use of com.facebook.presto.tdigest.TDigest in project presto by prestodb.

the class TestTDigestAggregationFunction method getExpectedValueDoubles.

@Override
protected Object getExpectedValueDoubles(double compression, double... values) {
    if (values.length == 0) {
        return null;
    }
    TDigest tDigest = createTDigest(compression);
    Arrays.stream(values).forEach(tDigest::add);
    return new SqlVarbinary(tDigest.serialize().getBytes());
}