MySQL raises error 1318 when a stored routine is invoked with more or fewer arguments than it was defined to accept.
MySQL Error 1318: ER_SP_WRONG_NO_OF_ARGS occurs when you call a stored procedure or function with the wrong number of parameters. Verify the routine signature with SHOW CREATE PROCEDURE/FUNCTION and supply the exact count to resolve the issue.
Incorrect number of arguments for %s %s; expected %u, got
Error 1318 signals that MySQL rejected a CALL or SELECT invocation because the supplied argument count does not match the routine’s definition. The server compares the incoming parameter list with the stored procedure or function signature and throws this execution-time error.
The problem surfaces immediately after the call statement runs, halting the session’s current statement. Correcting the argument list or changing the routine definition clears the fault.
Supplying fewer parameters than declared leads to Error 1318 at runtime. MySQL expects every IN, OUT, and INOUT parameter and raises the condition when one is missing.
Passing extra parameters also triggers the error. The server rejects any argument that exceeds the defined count, even if the extra values appear optional to you.
First confirm the routine’s exact signature with SHOW CREATE PROCEDURE or SHOW CREATE FUNCTION. Compare the output to the argument list in your CALL or SELECT statement.
Adjust the invocation so the number, order, and mode (IN, OUT, INOUT) of parameters match exactly. Re-run the statement to verify the correction.
Developers often rename or add parameters during routine maintenance but forget to update every CALL site. Grep your codebase for outdated calls and update them.
Automated deployments that mix client and server versions can cause mismatch. Ensure the client code and the deployed routine schema are in sync.
Version-control your stored routines and application code together to keep signatures aligned. Use Galaxy Collections to endorse the latest version and share it across teams.
Validate argument counts with unit tests that call each routine. Continuous Integration pipelines catch mismatches before production.
Error 1582 (ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT) surfaces when native MySQL functions receive the wrong number of arguments. Fix by matching the documented signature.
Error 1414 (ER_OUT_OF_RESOURCES) can appear if a recursive stored procedure loops and exhausts resources, not argument count. Optimize recursion depth.
The CALL or SELECT supplies fewer arguments than the stored routine defines, leaving required parameters unset.
The invocation includes more arguments than the routine signature, causing MySQL to refuse execution.
Routine was altered (ADD/DROP PARAMETER) while application code still calls the older version.
OUT or INOUT variables are omitted or replaced with literals instead of user variables, reducing the effective count.
Raised when a built-in function like CONCAT() receives the wrong number of arguments. Fix by matching the documented parameter list.
Occurs when the named stored procedure or function cannot be found. Verify routine name or schema.
Triggered when a routine references an undeclared variable. Declare it or correct the variable name.
Run SHOW CREATE PROCEDURE db.proc_name; The CREATE statement lists every parameter in order, with mode and datatype.
Yes, MySQL 8.0.13 and later let you define DEFAULT values in stored procedures, making some arguments optional.
Yes, Error 1318 appears for both stored procedures (CALL) and stored functions (SELECT func()).
Galaxy’s autocomplete pulls live routine signatures, so incorrect argument counts are flagged before execution.
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