MySQL raises Error 1312 when a stored procedure attempts to return a result set from a disallowed context such as a function, trigger, or subquery.
MySQL Error 1312 ER_SP_BADSELECT occurs when a stored procedure returns a result set inside a context that forbids it (function, trigger, subquery). Convert the procedure to a function, load the data into a temporary table, or rewrite the call to avoid the forbidden context to eliminate the error.
PROCEDURE %s can't return a result set in the given
Error 1312 appears with the message “PROCEDURE %s can't return a result set in the given context”. MySQL throws it when a stored procedure that produces rows is invoked from a location that forbids result sets.
The forbidden locations include stored functions, triggers, views, subqueries, prepared statements expecting a scalar, and other procedures that run in a no-result-set mode. Understanding these limits helps eliminate the runtime halt quickly.
Calling a procedure inside a stored function forces MySQL to block result sets, triggering ER_SP_BADSELECT.
Invoking a procedure from a trigger violates the rule that triggers cannot emit result sets, leading to the same error.
Using CALL in a subquery or view definition also fails because the containing statement expects a single value set or derived table, not an open cursor.
Definer security restrictions may switch the session to SQL_MODE=NO_BACKSLASH_ESCAPES, silently disallowing result-set procedures.
Rewrite the logic as a stored function that returns a scalar or JSON value when only one row is expected.
Insert the procedure output into a temporary table, then read from that table where result sets are permitted.
Refactor trigger code to perform direct DML instead of calling a reporting procedure.
Use SELECT … INTO variables inside the procedure so that nothing is sent to the client when the caller forbids result sets.
Function calling procedure: Replace CALL with a deterministic function or use SELECT INTO.
Trigger auditing via procedure: Move auditing logic directly into the trigger body.
Subquery CALL: Convert the procedure into a table-valued function or temporary table load.
View definition error: Materialize the data with a scheduled job and query the table inside the view.
Never CALL procedures from functions, triggers, or views that must remain deterministic.
Design procedures for client consumption only and functions for internal calculations.
Use OUT parameters or temporary tables instead of open result sets when embedding logic in restricted contexts.
Enable SQL_MODE=STRICT to surface misuse early in development. Galaxy’s real-time linting warns when a CALL is used in a banned place.
Error 1336 ER_SP_BADRETURN indicates RETURN statements in procedures. Verify procedure vs function usage.
Error 1415 Not allowed to return a result set from a function signals you used SELECT in a stored function. Replace with RETURN.
Functions cannot emit result sets. Any CALL inside a function triggers ER_SP_BADSELECT.
Triggers run in a context that forbids result sets, so calling a reporting procedure fails.
Subqueries and views expect a derived table or scalar value, not an open result set.
Definer or replication settings may silently block result-set delivery, surfacing this error.
Raised when a SELECT in a stored function attempts to produce rows. Rewrite to RETURN.
Occurs when a procedure contains an illegal RETURN. Use LEAVE or restructure as a function.
Appears when a scalar subquery returns multiple rows. Use LIMIT or aggregate.
No. MySQL forbids procedures inside functions because procedures can return result sets and cause side effects.
Use OUT parameters, user-defined variables, or temporary tables instead of result sets when crossing context boundaries.
No native table-valued functions exist yet. Use JSON or temporary tables as a workaround.
Galaxy’s AI copilot inspects the call graph and warns when CALL is placed inside a restricted context, reducing runtime surprises.
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