wangyum commented on issue #25942: [SPARK-21914][SQL][TESTS] Check results of 
expression examples
URL: https://github.com/apache/spark/pull/25942#issuecomment-536142237
 
 
   Sorry @MaxGekk It seems this commit has flaky test on JDK 11:
   ```
   Error Message
   the pattern '\%SystemDrive\%\Users%' is invalid, the escape character is not 
allowed to precede 'U';
   Stacktrace
         org.apache.spark.sql.AnalysisException: the pattern 
'\%SystemDrive\%\Users%' is invalid, the escape character is not allowed to 
precede 'U';
         at 
org.apache.spark.sql.catalyst.util.StringUtils$.fail$1(StringUtils.scala:48)
         at 
org.apache.spark.sql.catalyst.util.StringUtils$.escapeLikeRegex(StringUtils.scala:57)
         at 
org.apache.spark.sql.catalyst.expressions.Like.escape(regexpExpressions.scala:108)
         at 
org.apache.spark.sql.catalyst.expressions.StringRegexExpression.compile(regexpExpressions.scala:51)
         at 
org.apache.spark.sql.catalyst.expressions.StringRegexExpression.pattern(regexpExpressions.scala:54)
         at 
org.apache.spark.sql.catalyst.expressions.StringRegexExpression.nullSafeEval(regexpExpressions.scala:57)
         at 
org.apache.spark.sql.catalyst.expressions.BinaryExpression.eval(Expression.scala:551)
   ```
   
   
https://amplab.cs.berkeley.edu/jenkins/job/spark-master-test-maven-hadoop-3.2-jdk-11/478/testReport/junit/org.apache.spark.sql/SQLQuerySuite/check_outputs_of_expression_examples
   
   
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/111486/console

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