Jonathancui123 commented on code in PR #37147:
URL: https://github.com/apache/spark/pull/37147#discussion_r918421341


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/UnivocityParser.scala:
##########
@@ -222,7 +226,11 @@ class UnivocityParser(
         } catch {
           case NonFatal(e) =>
             // If fails to parse, then tries the way used in 2.0 and 1.x for 
backwards
-            // compatibility.
+            // compatibility only if no custom pattern has been set. If there 
is a custom pattern,
+            // fail since it may be different from the default pattern.
+            if (options.dateFormatInRead.isDefined) {
+              throw e
+            }

Review Comment:
   This change makes sense to me



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