The error appears when a stored procedure tries to OPEN a cursor that is already in the open state, violating MySQL’s cursor lifecycle rules.
MySQL Error 1325: ER_SP_CURSOR_ALREADY_OPEN occurs when a stored procedure calls OPEN on a cursor that has not yet been closed. Close the existing cursor or use a different one before reopening to resolve the issue.
Cursor is already open
Error 1325 fires when a stored procedure attempts to execute an OPEN statement on a cursor that is already open. MySQL raises SQLSTATE 24000 to indicate the cursor3s lifecycle rules have been violated.
The error prevents resource leaks and undefined result-set behavior. Fixing it quickly is vital because unhandled cursor states can cascade into lock contention and unpredictable application failures.
The error is triggered primarily by calling OPEN twice on the same cursor handle without an intervening CLOSE. It also appears when exception blocks jump to labels that reopen a cursor still in scope.
Concurrency issues inside nested procedures can leave a cursor open in an outer frame, causing subsequent OPEN statements to fail.
Identify every execution path that leaves the cursor open. Always CLOSE the cursor before any possible re-OPEN. If logic requires multiple result sets, declare separate cursors or REOPEN in a loop with CLOSE in the same cycle.
Wrap OPEN and CLOSE in robust error-handling blocks to guarantee cleanup even when an exception is raised.
Loop processing that BREAKs early can skip the CLOSE call. Place the CLOSE directly after the loop or use a LEAVE-handled exit handler that closes the cursor.
Recursive stored procedures may forget to close the cursor in the base case. Ensure each recursion level includes a matching CLOSE.
Adopt a DEFENSIVE-CLOSE pattern: close a cursor in a FINALLY-style handler before any return. Prefix each OPEN with an IF cursor_not_open check in MySQL 8.0+ using performance_schema metadata.
Galaxy3s editor surfaces unclosed cursor warnings during linting and can insert boilerplate OPEN-FETCH-CLOSE blocks, reducing human error.
Error 1329 (ER_SP_CURSOR_NOT_OPEN) arises when FETCH or CLOSE is called on a cursor that was never opened. Avoid by ensuring OPEN precedes FETCH/CLOSE.
Error 1324 (ER_SP_CURSOR_MISMATCH) surfaces when the wrong cursor variable is used with FETCH. Keep cursor naming consistent or use Galaxy3s autocomplete to minimize mixups.
The same cursor variable is opened twice without a CLOSE in between.
Flow control leaves the procedure before the CLOSE executes.
Errors in FETCH logic skip cleanup, leaving the cursor open.
Outer procedure reopens a cursor still open from an inner call.
Raised when FETCH or CLOSE is called on a cursor that was never opened.
Occurs when FETCH targets a cursor declared in another scope or mismatched variable.
Directory change failure in stored procedures, not cursor-related but common in same routines.
Yes. Failing to CLOSE a cursor leaks server resources and can block subsequent OPEN statements, triggering Error 1325.
In MySQL 8.0, query performance_schema.threads or use GET DIAGNOSTICS to check cursor state. Otherwise, track it with a user variable.
Galaxy3s linter highlights OPEN statements without matching CLOSE calls, helping you prevent Error 1325 before execution.
Error 1325 exists in MySQL 5.0+ and MariaDB; behavior is consistent across versions, but diagnostics metadata improves in 8.0.
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