HyukjinKwon commented on a change in pull request #34995:
URL: https://github.com/apache/spark/pull/34995#discussion_r776110964
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/ExternalCatalogUtils.scala
##########
@@ -52,7 +52,7 @@ object ExternalCatalogUtils {
'\n', '\u000B', '\u000C', '\r', '\u000E', '\u000F', '\u0010', '\u0011',
'\u0012', '\u0013',
'\u0014', '\u0015', '\u0016', '\u0017', '\u0018', '\u0019', '\u001A',
'\u001B', '\u001C',
'\u001D', '\u001E', '\u001F', '"', '#', '%', '\'', '*', '/', ':', '=',
'?', '\\', '\u007F',
- '{', '[', ']', '^')
+ '{', '[', ']', '^', '.')
Review comment:
Actually, it would also break the forward compatibility too (old Spark
versions to read the tables written by new Spark versions), which we don't
guarantee in general but would be great to have a switch to control that in any
event.
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