1303
MySQLerrorstored-procedureshigh confidence
PROCEDURE uses a cursor — cannot use as a plain SELECT
Production Risk
Low — syntax error; query not executed.
What this means
A procedure that uses cursors was called in a context that expects a single result set, such as a subquery.
Why it happens
- 1Calling a cursor-using procedure as if it were a function or inline view
How to reproduce
trigger — this will error
trigger — this will error
SELECT * FROM (CALL my_cursor_proc()) t;
expected output
ERROR 1303 (0A000): PROCEDURE db.my_cursor_proc can't return a result set in the given context
Fix
Call the procedure separately
Call the procedure separately
CALL my_cursor_proc();
Why this works
Procedures must be called with CALL, not embedded in SELECT.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 1303 ER_SP_BADSELECT
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