andygrove commented on code in PR #42434:
URL: https://github.com/apache/spark/pull/42434#discussion_r1290421968
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ToStringBase.scala:
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@@ -352,7 +352,7 @@ trait ToStringBase { self: UnaryExpression with
TimeZoneAwareExpression =>
| $buffer.append($keyToStringFunc($getMapFirstKey));
| $buffer.append(" ->");
| if ($map.valueArray().isNullAt(0)) {
- | ${appendNull(buffer, isFirstElement = true)}
+ | ${appendNull(buffer, isFirstElement = false)}
Review Comment:
There should always be a space after `->` and before the value. It does not
matter if this is the first key-value pair or not.
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