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c86032f43b
Convert PlayerBots tables to InnoDB (disable strict mode during
conversion)
# Pull Request
### This change converts the PlayerBots-related tables from MyISAM to
InnoDB.
**Why this is beneficial (even without fixing a specific bug):**
- Crash safety & data integrity: InnoDB is transactional and uses redo
logs; it provides automatic crash recovery, unlike MyISAM which can
require manual repairs after unclean shutdowns.
- Row-level locking: InnoDB reduces write contention and improves
concurrency under bot-heavy workloads compared to MyISAM’s table-level
locks.
- Consistent reads: InnoDB supports MVCC, enabling stable reads while
writes are happening—useful for mixed read/write access patterns.
- Operational robustness: Better behavior under backup/restore and
replication scenarios; fewer “table marked as crashed” style issues.
Strict mode handling:
The migration toggles innodb_strict_mode off only for the session to
prevent the conversion from failing on edge-case legacy definitions,
then re-enables it immediately after.
---
## How to Test the Changes
- Step-by-step instructions to test the change
Run the SQL script in the Playerbot database.
- Any required setup (e.g. multiple players, bots, specific
configuration)
No
- Expected behavior and how to verify it
All tables should now have been converted from InnoDB to MyISAM.
This script should return nothing:
```
SELECT
t.TABLE_SCHEMA AS db_name,
t.TABLE_NAME AS table_name,
t.ENGINE AS storage_engine
FROM information_schema.TABLES t
WHERE t.TABLE_SCHEMA = DATABASE()
-- With phpMyAdmin, use the following and insert your database name, e.g., “acore_playerbots.”
-- WHERE t.TABLE_SCHEMA = 'YOUR_PLAYERBOT_DB'
AND t.TABLE_TYPE = 'BASE TABLE'
AND t.ENGINE = 'MyISAM'
ORDER BY t.TABLE_NAME;
```
## Complexity & Impact
- Does this change add new decision branches?
- [x] No
- [ ] Yes (**explain below**)
- Does this change increase per-bot or per-tick processing?
- [x] No
- [ ] Yes (**describe and justify impact**)
- Could this logic scale poorly under load?
- [x] No
- [ ] Yes (**explain why**)
---
## Defaults & Configuration
- Does this change modify default bot behavior?
- [x] No
- [ ] Yes (**explain why**)
---
## AI Assistance
- Was AI assistance (e.g. ChatGPT or similar tools) used while working
on this change?
- [x] No
- [ ] Yes (**explain below**)
---
## Final Checklist
- [x] Stability is not compromised
- [x] Performance impact is understood, tested, and acceptable
- [ ] Documentation updated if needed
- [x] I tested this script on a server with 2000 bots for 6 days
(running 24/h) and had no issues with it.
---
## Notes for Reviewers
Anything that significantly improves realism at the cost of stability or
performance should be carefully discussed
before merging.