[jira] [Updated] (SPARK-27903) Improve parser error message for mismatched parentheses in expressions

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-27903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun updated SPARK-27903:
----------------------------------
    Affects Version/s:     (was: 3.0.0)
                       3.1.0

> 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: 3.1.0
>            Reporter: Yesheng Ma
>            Priority: Major
>
> 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
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org