Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20433#discussion_r172427617
--- Diff:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 ---
@@ -790,6 +796,16 @@ ASC: 'ASC';
DESC: 'DESC';
FOR: 'FOR';
INTERVAL: 'INTERVAL';
+YEAR: 'YEAR' | 'YEARS';
+MONTH: 'MONTH' | 'MONTHS';
+WEEK: 'WEEK' | 'WEEKS';
+DAY: 'DAY' | 'DAYS';
+HOUR: 'HOUR' | 'HOURS';
+MINUTE: 'MINUTE' | 'MINUTES';
+SECOND: 'SECOND' | 'SECONDS';
+MILLISECOND: 'MILLISECOND' | 'MILLISECONDS';
+MICROSECOND: 'MICROSECOND' | 'MICROSECONDS';
+NANOSECOND: 'NANOSECOND' | 'NANOSECONDS';
--- End diff --
We do not support `nanosecond`.
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