Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/14036#discussion_r70459222
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -237,6 +229,9 @@ case class Divide(left: Expression, right: Expression)
}
}
+ // Used by doGenCode
+ protected def divide(eval1: ExprCode, eval2: ExprCode, javaType:
String): String
--- End diff --
you can see from [this
test](https://github.com/apache/spark/pull/14036/files#diff-f3fc3b985a8877ee493f1a12ddfb98d6L143)
that the previous `Divide` expression can support all integral types and
fraction types.
BTW looks there is no special handling for integral type in your PR, for
fraction type:
```
if (dataType.isInstanceOf[DecimalType]) {
s"${eval1.value}.$decimalMethod(${eval2.value})"
} else {
s"($javaType)(${eval1.value} $symbol ${eval2.value})"
}
```
while the `symbol` is `/`, so we generate `($javaType)(${eval1.value} /
${eval2.value})` for double and float.
for integral type:
```
($javaType)(${eval1.value} $decimalMethod (${eval2.value}))
```
while the `decimalMethod` is `/`, so it's still generates
`($javaType)(${eval1.value} / ${eval2.value})`
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