cloud-fan commented on a change in pull request #26491: [SPARK-29870][SQL]
Unify the logic of multi-units interval string to CalendarInterval
URL: https://github.com/apache/spark/pull/26491#discussion_r346682638
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/IntervalUtils.scala
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@@ -452,20 +359,40 @@ object IntervalUtils {
private final val millisStr = unitToUtf8(MILLISECOND)
private final val microsStr = unitToUtf8(MICROSECOND)
+ /**
+ * A safe version of `stringToInterval`. It returns null for invalid input
string.
+ */
+ def safeStringToInterval(input: UTF8String): CalendarInterval = {
+ try {
+ stringToInterval(input)
+ } catch {
+ case _: IllegalArgumentException => null
+ }
+ }
+
+ /**
+ * Converts a string to [[CalendarInterval]] case-insensitively.
+ *
+ * @throws IllegalArgumentException if the input string is not in valid
interval format.
+ */
def stringToInterval(input: UTF8String): CalendarInterval = {
import ParseState._
+ var state = PREFIX
+ def throwIAE(msg: String, e: Exception = null) = {
+ throw new IllegalArgumentException(s"Error parsing interval, $msg", e)
Review comment:
nit: `Error parsing '$input' interval: $msg`
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