dev-lpq opened a new pull request, #49481:
URL: https://github.com/apache/spark/pull/49481
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### What changes were proposed in this pull request?
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The statement `(CAST(`hgssiteid` AS LONGTEXT) = '101772291401')` is not work
in the jdbc MYSQL/TIDB
https://dev.mysql.com/doc/refman/8.4/en/cast-functions.html
Produces a string with the VARCHAR data type, unless the expression expr is
empty (zero length), in which case the result type is CHAR(0). If the optional
length N is given, CHAR(N) causes the cast to use no more than N characters of
the argument. No padding occurs for values shorter than N characters. If the
optional length N is not given, MySQL calculates the maximum length from the
expression. If the supplied or calculated length is greater than an internal
threshold, the result type is TEXT. If the length is still too long, the result
type is LONGTEXT.
### Why are the changes needed?
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1. MYSQL table: canned_report_summary_daily
```
CREATE TABLE `test`.`canned_report_summary_daily` (
`day` date NOT NULL, `hgssiteid` bigint NOT NULL,
`num_of_meetings` bigint DEFAULT NULL,
`source` varchar(50) NOT NULL,
`updatetime` timestamp
DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`hgssiteid`,`day`))
ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
```
2. Try to connect the MYSQL by `spark.sql.catalog.tidb.url`
```
spark.sql("SELECT `day`,`hgssiteid`,`num_of_meetings`,`source`" +
"FROM `tidb`.`test`.`canned_report_summary_daily`" +
"WHERE day >= '2024-12-10' AND day <= '2025-01-09' AND hgssiteid in
('101772291401');")
```
hgssiteid in ('101772291401') => hgssiteid bigint converted to String
'101772291401' to query
3. Spark SQL statement
(`day` IS NOT NULL) AND (`hgssiteid` IS NOT NULL) AND (`day` >=
'2024-12-10') AND (`day` <= '2025-01-09') AND (CAST(`hgssiteid` AS LONGTEXT) =
'101772291401')
`Job aborted due to stage failure: Task 0 in stage 0.0 failed 1 times, most
recent failure: Lost task 0.0 in stage 0.0 (TID 0) (10.140.216.204 executor
driver): java.sql.SQLSyntaxErrorException: You have an error in your SQL
syntax; check the manual that corresponds to your MySQL server version for the
right syntax to use near 'LONGTEXT) = '101772291401') LIMIT 21' at line 1`
### Does this PR introduce _any_ user-facing change?
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No
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Local Test
`(CAST(`hgssiteid` AS LONGTEXT) = '101772291401')` => `(CAST(`hgssiteid` AS
CHAR) = '101772291401')`
query successfully
<img width="1711" alt="Screenshot 2025-01-14 at 15 50 02"
src="https://github.com/user-attachments/assets/356b230e-82fe-4875-9697-e4b3ba3a81a2";
/>
### Was this patch authored or co-authored using generative AI tooling?
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No
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