HyukjinKwon commented on a change in pull request #28661:
URL: https://github.com/apache/spark/pull/28661#discussion_r431614778
##########
File path: python/pyspark/sql/utils.py
##########
@@ -18,8 +18,19 @@
import py4j
import sys
+from pyspark import SparkContext
+
if sys.version_info.major >= 3:
unicode = str
+ # Disable exception chaining (PEP 3134) in captured exceptions
+ # in order to hide JVM stacktace.
+ exec("""
+def raise_from(e):
+ raise e from None
+""")
+else:
+ def raise_from(e):
+ raise e
Review comment:
re: https://github.com/apache/spark/pull/28661#discussion_r431606605 too.
Yeah. In Python 2, there is no chaining. This is kind of a new feature in
Python 3.
e.g.) in the current master:
Python 2:
```python
>>> sql("a")
```
```
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/.../spark/python/pyspark/sql/session.py", line 646, in sql
return DataFrame(self._jsparkSession.sql(sqlQuery), self._wrapped)
File "/.../spark/python/lib/py4j-0.10.9-src.zip/py4j/java_gateway.py",
line 1305, in __call__
File "/.../spark/python/pyspark/sql/utils.py", line 102, in deco
raise converted
pyspark.sql.utils.ParseException:
mismatched input 'a' expecting {'(', 'ADD', 'ALTER', 'ANALYZE', 'CACHE',
'CLEAR', 'COMMENT', 'COMMIT', 'CREATE', 'DELETE', 'DESC', 'DESCRIBE', 'DFS',
'DROP', 'EXPLAIN', 'EXPORT', 'FROM', 'GRANT', 'IMPORT', 'INSERT', 'LIST',
'LOAD', 'LOCK', 'MAP', 'MERGE', 'MSCK', 'REDUCE', 'REFRESH', 'REPLACE',
'RESET', 'REVOKE', 'ROLLBACK', 'SELECT', 'SET', 'SHOW', 'START', 'TABLE',
'TRUNCATE', 'UNCACHE', 'UNLOCK', 'UPDATE', 'USE', 'VALUES', 'WITH'}(line 1, pos
0)
== SQL ==
a
^^^
```
Python 3:
```python
>>> sql("a")
```
```
Traceback (most recent call last):
File "/.../spark/python/pyspark/sql/utils.py", line 98, in deco
return f(*a, **kw)
File "/.../spark/python/lib/py4j-0.10.9-src.zip/py4j/protocol.py", line
328, in get_return_value
py4j.protocol.Py4JJavaError: An error occurred while calling o25.sql.
: org.apache.spark.sql.catalyst.parser.ParseException:
mismatched input 'a' expecting {'(', 'ADD', 'ALTER', 'ANALYZE', 'CACHE',
'CLEAR', 'COMMENT', 'COMMIT', 'CREATE', 'DELETE', 'DESC', 'DESCRIBE', 'DFS',
'DROP', 'EXPLAIN', 'EXPORT', 'FROM', 'GRANT', 'IMPORT', 'INSERT', 'LIST',
'LOAD', 'LOCK', 'MAP', 'MERGE', 'MSCK', 'REDUCE', 'REFRESH', 'REPLACE',
'RESET', 'REVOKE', 'ROLLBACK', 'SELECT', 'SET', 'SHOW', 'START', 'TABLE',
'TRUNCATE', 'UNCACHE', 'UNLOCK', 'UPDATE', 'USE', 'VALUES', 'WITH'}(line 1, pos
0)
== SQL ==
a
^^^
at
org.apache.spark.sql.catalyst.parser.ParseException.withCommand(ParseDriver.scala:266)
at
org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:133)
at
org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:49)
at
org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parsePlan(ParseDriver.scala:81)
at
org.apache.spark.sql.SparkSession.$anonfun$sql$2(SparkSession.scala:604)
at
org.apache.spark.sql.catalyst.QueryPlanningTracker.measurePhase(QueryPlanningTracker.scala:111)
at
org.apache.spark.sql.SparkSession.$anonfun$sql$1(SparkSession.scala:604)
at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:763)
at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:601)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:282)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:238)
at java.lang.Thread.run(Thread.java:748)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/.../spark/python/pyspark/sql/session.py", line 646, in sql
return DataFrame(self._jsparkSession.sql(sqlQuery), self._wrapped)
File "/.../spark/python/lib/py4j-0.10.9-src.zip/py4j/java_gateway.py",
line 1305, in __call__
File "/.../spark/python/pyspark/sql/utils.py", line 102, in deco
raise converted
pyspark.sql.utils.ParseException:
mismatched input 'a' expecting {'(', 'ADD', 'ALTER', 'ANALYZE', 'CACHE',
'CLEAR', 'COMMENT', 'COMMIT', 'CREATE', 'DELETE', 'DESC', 'DESCRIBE', 'DFS',
'DROP', 'EXPLAIN', 'EXPORT', 'FROM', 'GRANT', 'IMPORT', 'INSERT', 'LIST',
'LOAD', 'LOCK', 'MAP', 'MERGE', 'MSCK', 'REDUCE', 'REFRESH', 'REPLACE',
'RESET', 'REVOKE', 'ROLLBACK', 'SELECT', 'SET', 'SHOW', 'START', 'TABLE',
'TRUNCATE', 'UNCACHE', 'UNLOCK', 'UPDATE', 'USE', 'VALUES', 'WITH'}(line 1, pos
0)
== SQL ==
a
^^^
```
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