--rows does not take effect in CSV format

[ronylei]

1. mydumer's version

# mydumper --version
mydumper 0.12.3-3, built against MySQL 5.7.37-40

2. Data information

mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|  5000000 |
+----------+
1 row in set (6.97 sec)

3.start backup

# mydumper -u xxx -h xxx -p xxx --skip-tz-utc --outputdir=/data/csv/ -T test.sbtest1  --no-schemas -v 3 -t 4 --no-locks -r 500000 -F 10 --csv

** (mydumper:1999): WARNING **: 09:30:43.130: We are going to chunk by row and by filesize
** Message: 09:30:43.134: MyDumper backup version: 0.12.3-3
** Message: 09:30:43.172: Server version reported as: 8.0.29
** Message: 09:30:43.176: Connected to a MySQL server

** (mydumper:1999): WARNING **: 09:30:43.187: Executing in no-locks mode, snapshot will not be consistent
** Message: 09:30:43.198: Started dump at: 2022-06-21 09:30:43
** Message: 09:30:43.200: Written master status
** Message: 09:30:43.235: Thread 1 connected using MySQL connection ID 171
** Message: 09:30:43.243: Thread 2 connected using MySQL connection ID 172
** Message: 09:30:43.250: Thread 3 connected using MySQL connection ID 173
** Message: 09:30:43.255: Thread 4 connected using MySQL connection ID 174
** Message: 09:30:43.272: Thread 1 dumping schema create for `test`
** Message: 09:30:43.300: Thread 4 dumping data for `test`.`sbtest1` WHERE (`id` >= 1000001 AND `id` < 2000001) | Remaining jobs: 1
** Message: 09:30:43.300: Thread 1 dumping data for `test`.`sbtest1` WHERE (`id` >= 3000001 AND `id` < 4000001) | Remaining jobs: 1
** Message: 09:30:43.300: Thread 2 dumping data for `test`.`sbtest1` WHERE (`id` >= 2000001 AND `id` < 3000001) | Remaining jobs: -1
** Message: 09:30:43.300: Thread 3 dumping data for `test`.`sbtest1` WHERE `id` IS NULL OR (`id` >= 1 AND `id` < 1000001) | Remaining jobs: -1
** Message: 09:30:43.300: Shutdown jobs enqueued
** Message: 09:30:43.301: Waiting jobs to complete
** Message: 09:30:54.999: Thread 3 dumping data for `test`.`sbtest1` WHERE (`id` >= 4000001 AND `id` < 5000001) | Remaining jobs: 4
** Message: 09:30:56.862: Thread 4 shutting down
** Message: 09:30:57.418: Thread 1 shutting down
** Message: 09:30:57.525: Thread 2 shutting down
** Message: 09:31:05.394: Thread 3 shutting down
** Message: 09:31:05.394: Main connection closed
** Message: 09:31:05.395: Finished dump at: 2022-06-21 09:31:05

4.Check the backup information and find that the sql file information is consistent, and the CSV file is not split

# ls -lh
total 953M
-rw-r--r-- 1 root root  230 Jun 21 10:02 metadata
-rw-r--r-- 1 root root 953M Jun 21 10:02 test.sbtest1.00000.dat
-rw-r--r-- 1 root root  261 Jun 21 10:01 test.sbtest1.00000.sql
-rw-r--r-- 1 root root  261 Jun 21 10:01 test.sbtest1.00001.sql
-rw-r--r-- 1 root root  261 Jun 21 10:01 test.sbtest1.00002.sql
-rw-r--r-- 1 root root  261 Jun 21 10:01 test.sbtest1.00003.sql
-rw-r--r-- 1 root root  261 Jun 21 10:01 test.sbtest1.00004.sql
-rw-r--r-- 1 root root  146 Jun 21 10:01 test-schema-create.sql

# cat test.sbtest1.00000.sql
/*!40101 SET NAMES binary*/;
/*!40014 SET FOREIGN_KEY_CHECKS=0*/;
LOAD DATA LOCAL INFILE 'test.sbtest1.00000.dat' REPLACE INTO TABLE `sbtest1` FIELDS TERMINATED BY ',' ENCLOSED BY '"' ESCAPED BY '\\' LINES STARTING BY '' TERMINATED BY '
' (`id`,`k`,`c`,`pad`);

# cat test.sbtest1.00001.sql
/*!40101 SET NAMES binary*/;
/*!40014 SET FOREIGN_KEY_CHECKS=0*/;
LOAD DATA LOCAL INFILE 'test.sbtest1.00000.dat' REPLACE INTO TABLE `sbtest1` FIELDS TERMINATED BY ',' ENCLOSED BY '"' ESCAPED BY '\\' LINES STARTING BY '' TERMINATED BY '
' (`id`,`k`,`c`,`pad`);