Use when writing stored procedures or stored functions, designing error handling with DECLARE HANDLER, using SIGNAL and RESIGNAL for custom errors, choosing DETERMINISTIC vs NOT DETERMINISTIC, or porting MySQL procedures to MariaDB. Prevents the common mistake of marking a function DETERMINISTIC whe
Use when writing stored procedures or stored functions, designing error handling with DECLARE HANDLER, using SIGNAL and RESIGNAL for custom errors, choosing DETERMINISTIC vs NOT DETERMINISTIC, or porting MySQL procedures to MariaDB. Prevents the common mistake of marking a function DETERMINISTIC when it reads NOW() or session variables, putting heavy stored-function logic in WHERE clauses (defeats