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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.types
import org.scalatest.PrivateMethodTester
import org.apache.spark.SparkFunSuite
import org.apache.spark.sql.types.Decimal._
class DecimalSuite extends SparkFunSuite with PrivateMethodTester {
/** Check that a Decimal has the given string representation, precision and scale */
private def checkDecimal(d: Decimal, string: String, precision: Int, scale: Int): Unit = {
assert(d.toString === string)
assert(d.precision === precision)
assert(d.scale === scale)
}
test("creating decimals") {
checkDecimal(new Decimal(), "0", 1, 0)
checkDecimal(Decimal(BigDecimal("10.030")), "10.030", 5, 3)
checkDecimal(Decimal(BigDecimal("10.030"), 4, 1), "10.0", 4, 1)
checkDecimal(Decimal(BigDecimal("-9.95"), 4, 1), "-10.0", 4, 1)
checkDecimal(Decimal("10.030"), "10.030", 5, 3)
checkDecimal(Decimal(10.03), "10.03", 4, 2)
checkDecimal(Decimal(17L), "17", 20, 0)
checkDecimal(Decimal(17), "17", 10, 0)
checkDecimal(Decimal(17L, 2, 1), "1.7", 2, 1)
checkDecimal(Decimal(170L, 4, 2), "1.70", 4, 2)
checkDecimal(Decimal(17L, 24, 1), "1.7", 24, 1)
checkDecimal(Decimal(1e17.toLong, 18, 0), 1e17.toLong.toString, 18, 0)
checkDecimal(Decimal(1000000000000000000L, 20, 2), "10000000000000000.00", 20, 2)
checkDecimal(Decimal(Long.MaxValue), Long.MaxValue.toString, 20, 0)
checkDecimal(Decimal(Long.MinValue), Long.MinValue.toString, 20, 0)
intercept[IllegalArgumentException](Decimal(170L, 2, 1))
intercept[IllegalArgumentException](Decimal(170L, 2, 0))
intercept[IllegalArgumentException](Decimal(BigDecimal("10.030"), 2, 1))
intercept[IllegalArgumentException](Decimal(BigDecimal("-9.95"), 2, 1))
intercept[IllegalArgumentException](Decimal(1e17.toLong, 17, 0))
}
test("creating decimals with negative scale") {
checkDecimal(Decimal(BigDecimal("98765"), 5, -3), "9.9E+4", 5, -3)
checkDecimal(Decimal(BigDecimal("314.159"), 6, -2), "3E+2", 6, -2)
checkDecimal(Decimal(BigDecimal(1.579e12), 4, -9), "1.579E+12", 4, -9)
checkDecimal(Decimal(BigDecimal(1.579e12), 4, -10), "1.58E+12", 4, -10)
checkDecimal(Decimal(103050709L, 9, -10), "1.03050709E+18", 9, -10)
checkDecimal(Decimal(1e8.toLong, 10, -10), "1.00000000E+18", 10, -10)
}
test("double and long values") {
/** Check that a Decimal converts to the given double and long values */
def checkValues(d: Decimal, doubleValue: Double, longValue: Long): Unit = {
assert(d.toDouble === doubleValue)
assert(d.toLong === longValue)
}
checkValues(new Decimal(), 0.0, 0L)
checkValues(Decimal(BigDecimal("10.030")), 10.03, 10L)
checkValues(Decimal(BigDecimal("10.030"), 4, 1), 10.0, 10L)
checkValues(Decimal(BigDecimal("-9.95"), 4, 1), -10.0, -10L)
checkValues(Decimal(10.03), 10.03, 10L)
checkValues(Decimal(17L), 17.0, 17L)
checkValues(Decimal(17), 17.0, 17L)
checkValues(Decimal(17L, 2, 1), 1.7, 1L)
checkValues(Decimal(170L, 4, 2), 1.7, 1L)
checkValues(Decimal(1e16.toLong), 1e16, 1e16.toLong)
checkValues(Decimal(1e17.toLong), 1e17, 1e17.toLong)
checkValues(Decimal(1e18.toLong), 1e18, 1e18.toLong)
checkValues(Decimal(2e18.toLong), 2e18, 2e18.toLong)
checkValues(Decimal(Long.MaxValue), Long.MaxValue.toDouble, Long.MaxValue)
checkValues(Decimal(Long.MinValue), Long.MinValue.toDouble, Long.MinValue)
checkValues(Decimal(Double.MaxValue), Double.MaxValue, 0L)
checkValues(Decimal(Double.MinValue), Double.MinValue, 0L)
}
// Accessor for the BigDecimal value of a Decimal, which will be null if it's using Longs
private val decimalVal = PrivateMethod[BigDecimal]('decimalVal)
/** Check whether a decimal is represented compactly (passing whether we expect it to be) */
private def checkCompact(d: Decimal, expected: Boolean): Unit = {
val isCompact = d.invokePrivate(decimalVal()).eq(null)
assert(isCompact == expected, s"$d ${if (expected) "was not" else "was"} compact")
}
test("small decimals represented as unscaled long") {
checkCompact(new Decimal(), true)
checkCompact(Decimal(BigDecimal(10.03)), false)
checkCompact(Decimal(BigDecimal(1e20)), false)
checkCompact(Decimal(17L), true)
checkCompact(Decimal(17), true)
checkCompact(Decimal(17L, 2, 1), true)
checkCompact(Decimal(170L, 4, 2), true)
checkCompact(Decimal(17L, 24, 1), true)
checkCompact(Decimal(1e16.toLong), true)
checkCompact(Decimal(1e17.toLong), true)
checkCompact(Decimal(1e18.toLong - 1), true)
checkCompact(Decimal(- 1e18.toLong + 1), true)
checkCompact(Decimal(1e18.toLong - 1, 30, 10), true)
checkCompact(Decimal(- 1e18.toLong + 1, 30, 10), true)
checkCompact(Decimal(1e18.toLong), false)
checkCompact(Decimal(-1e18.toLong), false)
checkCompact(Decimal(1e18.toLong, 30, 10), false)
checkCompact(Decimal(-1e18.toLong, 30, 10), false)
checkCompact(Decimal(Long.MaxValue), false)
checkCompact(Decimal(Long.MinValue), false)
}
test("hash code") {
assert(Decimal(123).hashCode() === (123).##)
assert(Decimal(-123).hashCode() === (-123).##)
assert(Decimal(Int.MaxValue).hashCode() === Int.MaxValue.##)
assert(Decimal(Long.MaxValue).hashCode() === Long.MaxValue.##)
assert(Decimal(BigDecimal(123)).hashCode() === (123).##)
val reallyBig = BigDecimal("123182312312313232112312312123.1231231231")
assert(Decimal(reallyBig).hashCode() === reallyBig.hashCode)
}
test("equals") {
// The decimals on the left are stored compactly, while the ones on the right aren't
checkCompact(Decimal(123), true)
checkCompact(Decimal(BigDecimal(123)), false)
checkCompact(Decimal("123"), false)
assert(Decimal(123) === Decimal(BigDecimal(123)))
assert(Decimal(123) === Decimal(BigDecimal("123.00")))
assert(Decimal(-123) === Decimal(BigDecimal(-123)))
assert(Decimal(-123) === Decimal(BigDecimal("-123.00")))
}
test("isZero") {
assert(Decimal(0).isZero)
assert(Decimal(0, 4, 2).isZero)
assert(Decimal("0").isZero)
assert(Decimal("0.000").isZero)
assert(!Decimal(1).isZero)
assert(!Decimal(1, 4, 2).isZero)
assert(!Decimal("1").isZero)
assert(!Decimal("0.001").isZero)
}
test("arithmetic") {
assert(Decimal(100) + Decimal(-100) === Decimal(0))
assert(Decimal(100) + Decimal(-100) === Decimal(0))
assert(Decimal(100) * Decimal(-100) === Decimal(-10000))
assert(Decimal(1e13) * Decimal(1e13) === Decimal(1e26))
assert(Decimal(100) / Decimal(-100) === Decimal(-1))
assert(Decimal(100) / Decimal(0) === null)
assert(Decimal(100) % Decimal(-100) === Decimal(0))
assert(Decimal(100) % Decimal(3) === Decimal(1))
assert(Decimal(-100) % Decimal(3) === Decimal(-1))
assert(Decimal(100) % Decimal(0) === null)
}
// regression test for SPARK-8359
test("accurate precision after multiplication") {
val decimal = (Decimal(Long.MaxValue, 38, 0) * Decimal(Long.MaxValue, 38, 0)).toJavaBigDecimal
assert(decimal.unscaledValue.toString === "85070591730234615847396907784232501249")
}
// regression test for SPARK-8677
test("fix non-terminating decimal expansion problem") {
val decimal = Decimal(1.0, 10, 3) / Decimal(3.0, 10, 3)
// The difference between decimal should not be more than 0.001.
assert(decimal.toDouble - 0.333 < 0.001)
}
// regression test for SPARK-8800
test("fix loss of precision/scale when doing division operation") {
val a = Decimal(2) / Decimal(3)
assert(a.toDouble < 1.0 && a.toDouble > 0.6)
val b = Decimal(1) / Decimal(8)
assert(b.toDouble === 0.125)
}
test("set/setOrNull") {
assert(new Decimal().set(10L, 10, 0).toUnscaledLong === 10L)
assert(new Decimal().set(100L, 10, 0).toUnscaledLong === 100L)
assert(Decimal(Long.MaxValue, 100, 0).toUnscaledLong === Long.MaxValue)
}
test("changePrecision/toPrecision on compact decimal should respect rounding mode") {
Seq(ROUND_FLOOR, ROUND_CEILING, ROUND_HALF_UP, ROUND_HALF_EVEN).foreach { mode =>
Seq("0.4", "0.5", "0.6", "1.0", "1.1", "1.6", "2.5", "5.5").foreach { n =>
Seq("", "-").foreach { sign =>
val bd = BigDecimal(sign + n)
val unscaled = (bd * 10).toLongExact
val d = Decimal(unscaled, 8, 1)
assert(d.changePrecision(10, 0, mode))
assert(d.toString === bd.setScale(0, mode).toString(), s"num: $sign$n, mode: $mode")
val copy = d.toPrecision(10, 0, mode).orNull
assert(copy !== null)
assert(d.ne(copy))
assert(d === copy)
assert(copy.toString === bd.setScale(0, mode).toString(), s"num: $sign$n, mode: $mode")
}
}
}
}
test("SPARK-20341: support BigInt's value does not fit in long value range") {
val bigInt = scala.math.BigInt("9223372036854775808")
val decimal = Decimal.apply(bigInt)
assert(decimal.toJavaBigDecimal.unscaledValue.toString === "9223372036854775808")
}
}
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