Daniel Darabos created SPARK-21136:
--------------------------------------
Summary: Misleading error message for typo in SQL
Key: SPARK-21136
URL: https://issues.apache.org/jira/browse/SPARK-21136
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.1.0
Reporter: Daniel Darabos
Priority: Minor
{code}
scala> spark.sql("select * from a left joinn b on a.id = b.id").show
org.apache.spark.sql.catalyst.parser.ParseException:
mismatched input 'from' expecting {<EOF>, 'WHERE', 'GROUP', 'ORDER', 'HAVING',
'LIMIT', 'LATERAL', 'WINDOW', 'UNION', 'EXCEPT', 'MINUS', 'INTERSECT', 'SORT',
'CLUSTER', 'DISTRIBUTE'}(line 1, pos 9)
== SQL ==
select * from a left joinn b on a.id = b.id
---------^^^
{code}
The issue is that {{^^^}} points at {{from}}, not at {{joinn}}. The text of the
error makes no sense either. If {{*}}, {{a}}, and {{b}} are complex in
themselves, a misleading error like this can hinder debugging substantially.
I tried to see if maybe I could fix this. Am I correct to deduce that the error
message originates in ANTLR4, which parses the query based on the syntax
defined in {{SqlBase.g4}}? If so, I guess I would have to figure out how that
syntax definition works, and why it misattributes the error.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
