<p>The error occurs when a stored function or trigger directly or indirectly calls itself, which MySQL forbids.</p>
<p>MySQL Error 1424: ER_SP_NO_RECURSION means MySQL detected a stored function or trigger calling itself. Remove the recursive call or replace it with non-recursive SQL logic to resolve the issue.</p>
Recursive stored functions and triggers are not allowed.
MySQL raises error code 1424 with the condition name ER_SP_NO_RECURSION when it detects a stored function or trigger that calls itself directly or indirectly. The engine halts execution to prevent infinite loops that could lock tables or exhaust resources.
The error appears during CREATE FUNCTION, CREATE TRIGGER, or any DML statement that activates the recursive object. Understanding why recursion is blocked lets you redesign the logic safely.
The root cause is a stored routine or trigger that references itself or another routine in a circular chain. MySQL tracks the call stack and stops execution once it finds recursion.
Another trigger on the same table can secretly introduce recursion if it calls a function that later fires the original trigger. Complex business logic often hides such loops.
Remove the recursive reference by rewriting the routine, moving the logic to a separate procedure, or using a single SQL statement that performs the needed update.
If true recursion is required, implement it in application code instead of inside MySQL, or use iterative temporary tables to mimic recursive behavior.
When an AFTER UPDATE trigger updates the same table, MySQL fires the trigger again and raises error 1424. Replace the trigger body with a conditional UPDATE that skips the affected rows.
A function that calls itself to compute hierarchical sums will fail. Use a recursive Common Table Expression available in MySQL 8.0 or higher instead of a stored function.
Audit triggers and functions for hidden dependencies before deployment. Use code review tools in Galaxy to surface cross object references.
Prefer set based SQL or recursive CTEs, which MySQL allows, over procedural recursion in stored routines.
MySQL Error 1452 foreign_key_constraint fails when child rows have no parent. Resolve by inserting parent rows first.
MySQL Error 1062 duplicate_entry arises on unique index collisions. Fix by deduplicating data or adding IGNORE.
A trigger or function explicitly invokes itself, causing immediate recursion detection.
Routine A calls B, B calls C, and C calls A, forming a loop MySQL disallows.
An AFTER UPDATE trigger executes an UPDATE on the same table, which refires the trigger recursively.
Raised when attempting to create a trigger on a view. Use base tables instead.
Occurs when inserting NULL into a column without a default. Provide a value or alter the column.
Raised on deleting a parent row referenced by a child. Delete child rows first or disable foreign keys.
No. MySQL design blocks recursive triggers entirely to protect transaction stability.
Yes, procedures can be recursive. The restriction applies only to stored functions and triggers.
No, the rule remains. However, recursive CTEs introduced in 8.0 provide a set based alternative.
Galaxy highlights cross object references during code review, enabling teams to spot recursion before deployment.
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