hililiwei commented on code in PR #6617:
URL: https://github.com/apache/iceberg/pull/6617#discussion_r1082173399


##########
spark/v3.3/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/parser/extensions/IcebergSqlExtensionsAstBuilder.scala:
##########
@@ -267,6 +286,12 @@ class IcebergSqlExtensionsAstBuilder(delegate: 
ParserInterface) extends IcebergS
   private def typedVisit[T](ctx: ParseTree): T = {
     ctx.accept(this).asInstanceOf[T]
   }
+
+  private def timeRetain(unit: String, duration: Long): Long = 
unit.toUpperCase(Locale.ENGLISH) match {
+    case "MONTHS" => 30 * TimeUnit.DAYS.toMillis(duration)

Review Comment:
   Yes, it does. Updated.
   
   



##########
spark/v3.3/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/parser/extensions/IcebergSqlExtensionsAstBuilder.scala:
##########
@@ -267,6 +286,12 @@ class IcebergSqlExtensionsAstBuilder(delegate: 
ParserInterface) extends IcebergS
   private def typedVisit[T](ctx: ParseTree): T = {
     ctx.accept(this).asInstanceOf[T]
   }
+
+  private def timeRetain(unit: String, duration: Long): Long = 
unit.toUpperCase(Locale.ENGLISH) match {
+    case "MONTHS" => 30 * TimeUnit.DAYS.toMillis(duration)
+    case "DAYS" | "HOURS" | "MINUTES" => 
TimeUnit.valueOf(unit.toUpperCase(Locale.ENGLISH)).toMillis(duration)

Review Comment:
   Done.



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