MySQL Errors
MySQL Errors 1138 — ER_INVALID_USE_OF_NULL
In MySQL Errors, code 1138 is ER_INVALID_USE_OF_NULL. The official source describes it as “Invalid use of NULL value”. Its concrete cause depends on the operation and surrounding message.
Code1138
SymbolER_INVALID_USE_OF_NULL
Source confidencehigh
Official definition
Invalid use of NULL value
In plain language
In MySQL Errors, code 1138 is ER_INVALID_USE_OF_NULL. The official source describes it as “Invalid use of NULL value”. Its concrete cause depends on the operation and surrounding message.
Context to inspect
- The surrounding operation, version and subsystem determine the actual cause.
- The same numeric value can mean something different in another namespace.
Safe first checks
- Confirm which product, protocol or subsystem produced the code.
- Read the full surrounding error message and inspect relevant logs.
- Compare the code with the linked authoritative documentation before changing configuration.
Important context
The surrounding operation, version and subsystem determine the actual cause.