yeshengm commented on a change in pull request #24809: [SPARK-21136][SQL] Fix
confusing parsing error due to problematic antlr grammer for Hive-style
single-from statements
URL: https://github.com/apache/spark/pull/24809#discussion_r291372586
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -411,6 +406,7 @@ queryTerm
queryPrimary
: querySpecification
#queryPrimaryDefault
+ | fromStatement
#fromStmt
Review comment:
According to Hive compatibility test, `fromStatement` should be in the same
level as queries such as `SELECT * FROM table`.
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