MySQL client error 2029 (CR_NULL_POINTER) means the application passed a null pointer to a C API function, so the client library cannot process the request.
MySQL Error 2029: CR_NULL_POINTER happens when a null pointer is sent to a C API call, often during mysql_real_connect or query execution. Validate all pointers before calling MySQL C API functions and update to a compatible client library to resolve the issue.
Invalid use of null pointer
Error 2029 (CR_NULL_POINTER) is raised by the MySQL client library when an application hands a null pointer to any C API routine that expects a valid memory address.
The library exits early, returning this code to prevent a segmentation fault.
The server never receives the request, so fixing the client code or driver version is mandatory before retrying.
The error surfaces most frequently during mysql_init, mysql_real_connect, mysql_query, or mysql_stmt_prepare when the MYSQL* or MYSQL_STMT* handle is null.
It can also appear in language bindings that wrap the C API, such as libmysqlclient, Connector/C, Connector/Python (compiled mode), and some ODBC drivers.
Leaving a null pointer unchecked can crash applications, leak resources, and block database operations. Production workloads depending on continuous connectivity may suffer outages until the bug is fixed.
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No. The error occurs before SQL reaches the server. It’s a client-side programming bug or driver mismatch.
The server version is irrelevant. Match your connector and client library versions instead.
Yes. Galaxy’s desktop SQL editor uses vetted connectors and runs pre-flight checks, so null pointer issues are caught during compilation before queries run.
No. The server never receives the malformed request. Fix the application or upgrade the client library.
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