Details
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Bug
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Status: Closed (View Workflow)
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Minor
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Resolution: Won't Fix
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10.1.22
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None
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centos 7, CPU E5-1630 v3 @ 3.70GHz, 64 GB RAM, RAID1 SSD
Description
Horrible performances when using REGEXP
|
|
SELECT count(*) FROM `jbm_clients`.`michelin`; |
+----------+ |
| count(*) | |
+----------+ |
| 13042 |
|
+----------+ |
1 row in set (0.01 sec) |
|
|
MariaDB [jbm]> SELECT distinct `ip` FROM `jbm_clients`.`michelin` WHERE `return_path` like '%amazonses%' and `return_path` REGEXP '(?:\.|@|-)*.amazonses.com(\.[a-z]+)?$' ; |
+-------------+ |
| ip |
|
+-------------+ |
| 54.240.4.10 |
|
| 54.240.4.11 |
|
| 54.240.4.12 |
|
| 54.240.4.7 |
|
| 54.240.4.8 |
|
| 54.240.4.9 |
|
+-------------+ |
6 rows in set (0.03 sec) |
|
|
MariaDB [jbm]> SELECT distinct `ip` FROM `jbm_clients`.`michelin` WHERE `return_path` REGEXP '(?:\.|@|-)*.amazonses.com(\.[a-z]+)?$' ; |
+-------------+ |
| ip |
|
+-------------+ |
| 54.240.4.10 |
|
| 54.240.4.11 |
|
| 54.240.4.12 |
|
| 54.240.4.7 |
|
| 54.240.4.8 |
|
| 54.240.4.9 |
|
+-------------+ |
6 rows in set (3 min 11.02 sec) |