<p>The error appears when a RESIGNAL statement is executed outside an active DECLARE ... HANDLER block in a MySQL stored program.</p>
<p>MySQL Error 1645: ER_RESIGNAL_WITHOUT_ACTIVE_HANDLER occurs when a RESIGNAL statement runs without an active handler context, typically in stored procedures, triggers, or events. Confirm that RESIGNAL is placed inside a DECLARE ... HANDLER block or replace it with SIGNAL to resolve the issue.</p>
RESIGNAL when handler not active
The server reports “RESIGNAL when handler not active” when it finds a RESIGNAL statement executing outside a currently running DECLARE ... HANDLER block. RESIGNAL can only be used inside an active handler to propagate or modify the caught error.
The problem arises in stored procedures, functions, triggers, or events written for MySQL 5.5+ where error-handling flow is mis-structured. The server halts execution, returns SQLSTATE 0K000, and rolls back the current statement.
Developers see Error 1645 immediately after invoking a routine containing a misplaced RESIGNAL. It appears during compile-time for stored procedures that run in DEFINER context and at run-time for dynamic SQL blocks.
Because Galaxy executes SQL exactly as written, the editor will surface the same message in its output pane, letting you jump straight to the faulty line for quick refactor.
The most frequent cause is placing RESIGNAL in normal procedural flow instead of inside a declared handler.
Nested blocks can end the handler’s scope earlier than expected, leaving RESIGNAL orphaned.
Adapting sample code that uses SIGNAL but accidentally replacing it with RESIGNAL triggers the error.
Older MySQL documentation examples using SIGNAL may be mixed with newer RESIGNAL semantics, causing misuse.
Raised when SIGNAL explicitly throws an error. Unlike RESIGNAL, SIGNAL works without a handler.
Occurs when a SELECT ... INTO finds no rows. Often handled with an EXIT HANDLER before using RESIGNAL.
General syntax issues in stored programs may disguise a misplaced RESIGNAL until compilation passes.
Yes, but only within a DECLARE ... HANDLER inside the trigger body. Otherwise use SIGNAL.
RESIGNAL was introduced in MySQL 5.5. It must follow the same scope rules in later versions.
By default it rolls back the current statement. Wrap logic in explicit transactions if you need full rollback.
Galaxy highlights control-flow statements and warns when RESIGNAL is unreachable, letting you fix it before execution.
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