for example, the promql will have some extra label like instance=~\"$instance\"
,
but our scraper hasn't these labels.
mysql> select * from flash_metrics_index where metric_name = "tiflash_coprocessor_request_count";
+-----------------------------------+---------------------+--------+--------+--------+--------+--------+--------+--------+--------+--------+---------+---------+---------+---------+---------+
| metric_name | label0 | label1 | label2 | label3 | label4 | label5 | label6 | label7 | label8 | label9 | label10 | label11 | label12 | label13 | label14 |
+-----------------------------------+---------------------+--------+--------+--------+--------+--------+--------+--------+--------+--------+---------+---------+---------+---------+---------+
| tiflash_coprocessor_request_count | run_mpp_task | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | cancel_mpp_task | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | mpp_establish_conn | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | batch | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | super_batch | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | cop_dag | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | dispatch_mpp_task | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | batch_cop | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | super_batch_cop_dag | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| tiflash_coprocessor_request_count | cop | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
+-----------------------------------+---------------------+--------+--------+--------+--------+--------+--------+--------+--------+--------+---------+---------+---------+---------+---------+
10 rows in set (0.00 sec)