cloud-fan commented on a change in pull request #26283: [SPARK-29622][SQL] do
not allow leading 'interval' in the interval string format
URL: https://github.com/apache/spark/pull/26283#discussion_r339595590
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -1930,71 +1917,73 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
}
/**
- * Create a [[CalendarInterval]] literal expression. An interval expression
can contain multiple
- * unit value pairs, for instance: interval 2 months 2 days.
+ * Creates a [[CalendarInterval]] literal expression with multiple units,
e.g. 1 YEAR 2 DAYS.
*/
- override def visitInterval(ctx: IntervalContext): Literal = withOrigin(ctx) {
- val intervals = ctx.intervalField.asScala.map(visitIntervalField)
- validate(intervals.nonEmpty, "at least one time unit should be given for
interval literal", ctx)
- Literal(intervals.reduce(_.add(_)))
- }
+ override def visitMultiUnitsInterval(ctx: MultiUnitsIntervalContext):
CalendarInterval = {
Review comment:
This is mostly the original `visitSingleInterval`, with some methods inlined.
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