cloud-fan commented on a change in pull request #29627:
URL: https://github.com/apache/spark/pull/29627#discussion_r482197715
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File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -818,6 +818,7 @@ primaryExpression
constant
: NULL
#nullLiteral
+ | INTERVAL STRING AS? identifier?
#maybeAliasedIntervalLiteral
Review comment:
can you check `interval '1 day' day` in other systems? To see if they
also treat '1 day' as the number of days and fail.
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