Yesheng Ma created SPARK-27903:
----------------------------------
Summary: Improve parser error message for mismatched parentheses
in expressions
Key: SPARK-27903
URL: https://issues.apache.org/jira/browse/SPARK-27903
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.0.0
Reporter: Yesheng Ma
When parentheses are mismatched in expressions in queries, the error message is
confusing. This is especially true for large queries, where mismatched parens
are tedious for human to figure out.
For example, the error message for
{code:sql}
SELECT ((x + y) * z FROM t;
{code}
is
{code:java}
mismatched input 'FROM' expecting ','(line 1, pos 20)
{code}
One possible way to fix is to explicitly capture such kind of mismatched parens
in a grammar rule and print user-friendly error message such as
{code:java}
mismatched parentheses for expression 'SELECT ((x + y) * z FROM t;'(line 1, pos
20)
{code}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
