cloud-fan commented on a change in pull request #34127:
URL: https://github.com/apache/spark/pull/34127#discussion_r725800604
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -106,7 +106,8 @@ singleTableSchema
statement
: query
#statementDefault
| ctes? dmlStatementNoWith
#dmlStatement
- | USE NAMESPACE? multipartIdentifier #use
+ | USE multipartIdentifier #use
+ | USE NAMESPACE multipartIdentifier
#useNamespace
Review comment:
some databases like DB2 support `SET SCHEMA xxx`, maybe we can change
this parser rule to `SET | USE NAMESPACE ...` in the future, to be more lenient.
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