srowen commented on a change in pull request #23878: [SPARK-26978][CORE][SQL]
Avoid magic time constants
URL: https://github.com/apache/spark/pull/23878#discussion_r259938127
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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@@ -927,7 +929,8 @@ case class Cast(child: Expression, dataType: DataType,
timeZoneId: Option[String
val tz = JavaCode.global(ctx.addReferenceObj("timeZone", timeZone),
timeZone.getClass)
(c, evPrim, evNull) =>
code"""$evPrim =
- org.apache.spark.sql.catalyst.util.DateTimeUtils.millisToDays($c /
1000L, $tz);"""
+ org.apache.spark.sql.catalyst.util.DateTimeUtils.millisToDays(
Review comment:
I agree with you @kiszk; this probably only adds a few ops though to invoke
a static method vs a division. The issue here is the size of the generated
bytecode, so the implementation of `toMillis` doesn't matter nor whether it's
JITted at runtime.
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