Major Description
Please view the parent task description for the general idea: https://issues.apache.org/jira/browse/SPARK-38384
Mismatched Input
Case 1
Before
ParseException: mismatched input 'sel' expecting {'(', 'APPLY', 'CONVERT', 'COPY', 'OPTIMIZE', 'RESTORE', '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', 'SYNC', 'TABLE', 'TRUNCATE', 'UNCACHE', 'UNLOCK', 'UPDATE', 'USE', 'VALUES', 'WITH'}(line 1, pos 0) == SQL == sel 1 ^^^
After
ParseException:
syntax error at or near 'sel'(line 1, pos 0)
== SQL ==
sel 1
^^^
Changes:
- Adjust the words, from ‘mismatched input {}’ to more readable one, ‘syntax error at or near {}.’. This also aligns with the PostgreSQL error messages.
- Remove the expecting full list.
Case 2
Before
ParseException: mismatched input '<EOF>' expecting {'(', 'CONVERT', 'COPY', 'OPTIMIZE', 'RESTORE', '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 == ^^^
After
ParseException: syntax error, unexpected empty SQL statement(line 1, pos 0) == SQL == ^^^
Changes:
- For empty query, output a specific error message ‘syntax error, unexpected empty SQL statement’
Case 3
Before
ParseException: mismatched input '<EOF>' expecting {'APPLY', 'CALLED', 'CHANGES', 'CLONE', 'COLLECT', 'CONTAINS', 'CONVERT', 'COPY', 'COPY_OPTIONS', 'CREDENTIAL', 'CREDENTIALS', 'DEEP', 'DEFINER', 'DELTA', 'DETERMINISTIC', 'ENCRYPTION', 'EXPECT', 'FAIL', 'FILES',… (omit long message) 'TRIM', 'TRUE', 'TRUNCATE', 'TRY_CAST', 'TYPE', 'UNARCHIVE', 'UNBOUNDED', 'UNCACHE', 'UNION', 'UNIQUE', 'UNKNOWN', 'UNLOCK', 'UNSET', 'UPDATE', 'USE', 'USER', 'USING', 'VALUES', 'VERSION', 'VIEW', 'VIEWS', 'WHEN', 'WHERE', 'WINDOW', 'WITH', 'WITHIN', 'YEAR', 'ZONE', IDENTIFIER, BACKQUOTED_IDENTIFIER}(line 1, pos 11) == SQL == select 1 ( -----------^^^
After
ParseException: syntax error at or near end of input(line 1, pos 11) == SQL == select 1 ( -----------^^^
Changes:
- For the faulty token <EOF>, substitute it to a readable string ‘end of input’.
