Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/10762#discussion_r50777117 --- Diff: sql/catalyst/src/main/antlr3/org/apache/spark/sql/catalyst/parser/SparkSqlLexer.g --- @@ -328,6 +328,8 @@ KW_WEEK: 'WEEK'|'WEEKS'; KW_MILLISECOND: 'MILLISECOND'|'MILLISECONDS'; KW_MICROSECOND: 'MICROSECOND'|'MICROSECONDS'; +KW_NATURAL: 'NATURAL'; --- End diff -- Is the ```NATURAL``` keyword reserved? If it is not, please add it to ```nonReserved``` rule in the Expression parser.
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