Error
Error Code:
1069
MariaDB Error 1069: Too Many Table Keys
Description
This error occurs when a CREATE TABLE or ALTER TABLE statement attempts to define more indexes (keys) than the maximum allowed by MariaDB for a single table. It typically arises when designing complex schemas or migrating tables with numerous indexing requirements, preventing the table operation from completing successfully.
Error Message
Too many keys specified; max %d keys allowed
Known Causes
3 known causesExceeding Maximum Index Limit
MariaDB imposes a hard limit on the number of indexes (keys) that can be defined on a single table, typically 64 for InnoDB tables. This error occurs when a schema definition surpasses this count.
Over-indexing Table Design
Designing a table with an excessive number of indexes, often in an attempt to optimize every possible query, can inadvertently lead to hitting the maximum key limit during table creation or alteration.
Migration from Other Databases
When migrating schemas from database systems with higher or no practical index limits per table, the existing design might exceed MariaDB's constraints upon creation or alteration.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service