viirya commented on a change in pull request #30189:
URL: https://github.com/apache/spark/pull/30189#discussion_r518935367
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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@@ -982,7 +985,7 @@ abstract class CastBase extends UnaryExpression with
TimeZoneAwareExpression wit
| $buffer.append($keyToStringFunc($getMapFirstKey));
| $buffer.append(" ->");
| if ($map.valueArray().isNullAt(0)) {
- | ${outNullElem(buffer)}
+ | ${appendIfNotLegacyCastToStr(buffer, " null")}
Review comment:
Okay it sounds good to me if we already have test for it. Thanks for
clarifying.
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