The client invokes a prepared-statement function on a statement handle that has not been successfully prepared on the current connection.
MySQL Error 2030: CR_NO_PREPARE_STMT appears when a client calls mysql_stmt_execute, bind, or close on a statement handle that was never prepared or was invalidated by a reconnect. Prepare the statement first, check return codes, and re-prepare after reconnects to fix it.
Statement not prepared
Error 2030 with condition name CR_NO_PREPARE_STMT means “Statement not prepared.” The MySQL client library refused to run a prepared-statement API call because the referenced MYSQL_STMT object is not in PREPARED state.
The error fires on mysql_stmt_execute, mysql_stmt_bind_param, mysql_stmt_bind_result, mysql_stmt_fetch, or mysql_stmt_close when the application skipped mysql_stmt_prepare, lost the connection after preparing, or reused an unprepared handle.
Developers see it most often in long-running services that cache statement handles, scripts that reuse a handle after a reconnect, or code paths that call execute before a conditional prepare.
It is a client-side issue; the server never receives the request because libmysqlclient blocks the call.
The error stops statement execution, leaving expected inserts, updates, or selects undone.
In transactional code it can cause rolled-back work or missing commits. Continuous failures flood logs and degrade performance.
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A prepared statement becomes invalid after a lost or timed-out connection. Reusing the old handle triggers CR_NO_PREPARE_STMT.
If an if/else branch bypasses mysql_stmt_prepare yet still runs execute, the handle is unprepared.
After mysql_stmt_close the handle state resets to UNSPECIFIED.
Further calls raise the error.
Associating a statement with one MYSQL* object and later executing it on another causes the client to report the statement as not prepared.
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No. It is generated by the client library before any network traffic is sent.
You can switch to mysql_query, but doing so forfeits the performance and safety benefits of prepared statements. Fixing the prepare flow is better.
No. It exists in all MySQL and MariaDB client libraries that implement the C API prepared-statement interface.
Galaxy highlights client errors in the result pane and lets you rerun statements interactively. Prepared statements are reissued on each execution, preventing stale handles.
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