Wataru Yukawa created SPARK-27170:
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Summary: Better error message for syntax error with extraneous
comma in the SQL parser
Key: SPARK-27170
URL: https://issues.apache.org/jira/browse/SPARK-27170
Project: Spark
Issue Type: Wish
Components: SQL
Affects Versions: 2.4.0
Reporter: Wataru Yukawa
[~maropu], [~smilegator]
It was great to talk with you in Hadoop / Spark Conference Japan 2019.
Thanks in advance!
I filed this issue which I talked with you at that time.
We sometimes write a syntax error SQL with extraneous comma by mistake.
For example, here is the SQL with an extraneous comma in line 2.
{code}
SELECT distinct
,a
,b
,c
FROM ...' LIMIT 100
{code}
We have an error message in spark 2.4.0 but it's a little hard to understand in
my feeling because line number is wrong.
{code}
cannot resolve '`distinct`' given input columns: [...]; line 1 pos 7;
'GlobalLimit 100
+- 'LocalLimit 100
+- 'Project ['distinct, ...]
+- Filter (...)
+- SubqueryAlias ...
+- HiveTableRelation ...
{code}
By the way, here is the error message in prestosql 305 and same sql.
Line number is correct and I guess an error message is better than sparksql.
{code}
line 2:5: mismatched input ','. Expecting: '*', <expression>, <identifier>
{code}
If sparksql error message improves, it would be great.
Thanks.
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