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[SPARK-10215] [SQL] Fix precision of division (follow the rule in Hive) #8415

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[SPARK-10215] [SQL] Fix precision of division (follow the rule in Hive) #8415

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7f9b428
Fix precision of division (follow the rule in Hive)
Aug 25, 2015
22a966d
fix test
Aug 25, 2015
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fix test
  • Loading branch information
Davies Liu committed Aug 25, 2015
commit 22a966dabb02db94e869b2b9748a1d37fea9fba1
4 changes: 2 additions & 2 deletions sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
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Expand Up @@ -751,7 +751,7 @@ object HiveTypeCoercion {

// If input is a numeric type but not decimal, and we expect a decimal type,
// cast the input to decimal.
case (d: NumericType, _: DecimalType) => Cast(e, DecimalType.forType(d))
case (d: NumericType, DecimalType) => Cast(e, DecimalType.forType(d))
// For any other numeric types, implicitly cast to each other, e.g. long -> int, int -> long
case (_: NumericType, target: NumericType) => Cast(e, target)

Expand All @@ -760,7 +760,7 @@ object HiveTypeCoercion {
case (TimestampType, DateType) => Cast(e, DateType)

// Implicit cast from/to string
case (StringType, _: DecimalType) => Cast(e, DecimalType.SYSTEM_DEFAULT)
case (StringType, DecimalType) => Cast(e, DecimalType.SYSTEM_DEFAULT)
case (StringType, target: NumericType) => Cast(e, target)
case (StringType, DateType) => Cast(e, DateType)
case (StringType, TimestampType) => Cast(e, TimestampType)
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9 changes: 4 additions & 5 deletions sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
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Expand Up @@ -17,15 +17,14 @@

package org.apache.spark.sql.catalyst.analysis

import org.apache.spark.sql.catalyst.dsl.expressions._
import org.apache.spark.sql.catalyst.dsl.plans._
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.plans.logical._
import org.apache.spark.sql.types._
import org.apache.spark.sql.catalyst.SimpleCatalystConf
import org.apache.spark.sql.catalyst.dsl.expressions._
import org.apache.spark.sql.catalyst.dsl.plans._

class AnalysisSuite extends AnalysisTest {
import TestRelations._
import org.apache.spark.sql.catalyst.analysis.TestRelations._

test("union project *") {
val plan = (1 to 100)
Expand Down Expand Up @@ -96,7 +95,7 @@ class AnalysisSuite extends AnalysisTest {
assert(pl(1).dataType == DoubleType)
assert(pl(2).dataType == DoubleType)
// StringType will be promoted into Decimal(38, 18)
assert(pl(3).dataType == DecimalType(38, 29))
assert(pl(3).dataType == DecimalType(38, 22))
assert(pl(4).dataType == DoubleType)
}

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8 changes: 4 additions & 4 deletions ...atalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
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Expand Up @@ -136,10 +136,10 @@ class DecimalPrecisionSuite extends SparkFunSuite with BeforeAndAfter {
checkType(Multiply(i, u), DecimalType(38, 18))
checkType(Multiply(u, u), DecimalType(38, 36))

checkType(Divide(u, d1), DecimalType(38, 21))
checkType(Divide(u, d2), DecimalType(38, 24))
checkType(Divide(u, i), DecimalType(38, 29))
checkType(Divide(u, u), DecimalType(38, 38))
checkType(Divide(u, d1), DecimalType(38, 18))
checkType(Divide(u, d2), DecimalType(38, 19))
checkType(Divide(u, i), DecimalType(38, 23))
checkType(Divide(u, u), DecimalType(38, 18))

checkType(Remainder(d1, u), DecimalType(19, 18))
checkType(Remainder(d2, u), DecimalType(21, 18))
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4 changes: 2 additions & 2 deletions sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
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Expand Up @@ -1622,9 +1622,9 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
checkAnswer(sql("select 10.3000 / 3.0"), Row(BigDecimal("3.4333333")))
checkAnswer(sql("select 10.30000 / 30.0"), Row(BigDecimal("0.343333333")))
checkAnswer(sql("select 10.300000000000000000 / 3.00000000000000000"),
Row(BigDecimal("3.4333333333333333333333333333333333333", new MathContext(38))))
Row(BigDecimal("3.433333333333333333333333333", new MathContext(38))))
checkAnswer(sql("select 10.3000000000000000000 / 3.00000000000000000"),
Row(null))
Row(BigDecimal("3.4333333333333333333333333333", new MathContext(38))))
}

test("SPARK-10215 Div of Decimal returns null") {
Expand Down