wangyum commented on issue #26172: [WIP][SPARK-29516][SQL][TEST] Test 
ThriftServerQueryTestSuite asynchronously
URL: https://github.com/apache/spark/pull/26172#issuecomment-544211685
 
 
   It seems the reason it `SQLConf.get` usage in 
[`ParseDriver.scala#L91-L103`](https://github.com/apache/spark/blob/b917a6593dc969b9b766259eb8cbbd6e90e0dc53/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/ParseDriver.scala#L91-L103).
 We can reproduce this issue after [this 
commit](https://github.com/apache/spark/pull/26172/commits/5c896ced3d44446fce8d185a58aab32aacbb978e):
   ```shell
   build/sbt "hive-thriftserver/test-only *.ThriftServerQueryTestSuite -- -z 
postgreSQL"  -Phive-thriftserver
   ```
   The output is:
   ```
   
================================================================================================
   statement: set spark.sql.ansi.enabled=false
   spark.sql.ansi.enabled before: true
   SQLConf.get.ansiEnabled: true
   spark.sql.ansi.enabled after: false
   
================================================================================================
   statement: select i, left('ahoj', i), right('ahoj', i) from range(-5, 6) 
t(i) order by i
   spark.sql.ansi.enabled before: false
   SQLConf.get.ansiEnabled: true
   
================================================================================================
   statement: set spark.sql.ansi.enabled=true
   spark.sql.ansi.enabled before: false
   SQLConf.get.ansiEnabled: true
   spark.sql.ansi.enabled after: true
   [info] - postgreSQL/text.sql *** FAILED *** (1 second, 489 milliseconds)
   [info]   "-1            
   [info]   -2             
   [info]   -3             
   [info]   -4             
   [info]   -5             
   [info]   0              
   [info]   1      a       j
   [info]   2      ah      oj
   [info]   3      aho     hoj
   [info]   4      ahoj    ahoj
   [info]   5      ahoj    ahoj" did not contain "Exception" Exception did not 
match for query #19
   [info]   select i, left('ahoj', i), right('ahoj', i) from range(-5, 6) t(i) 
order by i, expected: -1            
   [info]   -2             
   [info]   -3             
   [info]   -4             
   [info]   -5             
   [info]   0              
   [info]   1      a       j
   [info]   2      ah      oj
   [info]   3      aho     hoj
   [info]   4      ahoj    ahoj
   [info]   5      ahoj    ahoj, but got: java.sql.SQLException
   [info]   Error running query: 
org.apache.spark.sql.catalyst.parser.ParseException: 
   [info]   no viable alternative at input 'left'(line 1, pos 10)
   [info]   
   [info]   == SQL ==
   [info]   select i, left('ahoj', i), right('ahoj', i) from range(-5, 6) t(i) 
order by i
   [info]   ----------^^^ (ThriftServerQueryTestSuite.scala:225)
   
   ```

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