DECLARE
TYPE t_map IS TABLE OF NUMBER(20) INDEX BY VARCHAR2(255);
l_map t_map;
BEGIN
l_map('A') := 1;
dbms_output.put_line(l_map(NULL));
END; ORA-06502: PL/SQL: numeric or value error: NULL index table key value ORA-06512: at line 6 ORA-06512: at "SYS.DBMS_SQL", line 1721More Details: https://docs.oracle.com/error-help/db/ora-06502
DECLARE
TYPE t_map IS TABLE OF NUMBER(20) INDEX BY VARCHAR2(255);
l_map t_map;
BEGIN
dbms_output.put_line(l_map(NULL));
END; ORA-06502: PL/SQL: numeric or value error: NULL index table key value ORA-06512: at line 5 ORA-06512: at "SYS.DBMS_SQL", line 1721More Details: https://docs.oracle.com/error-help/db/ora-06502