Can't have alter table in SP ?

I tried to create a procedure
CREATE OR REPLACE PROCEDURE sp_disablefk
is
begin
Alter Table ACCOUNTDETAIL
Disable constraint SYS_C0022265;
end;
It returned me a message Encountered symbol Alter when expecting .....
However, when I place same statement in Execute Immediate statement, also inside of procedure, it creates and executes it without problems.
Can I still have it straight inside of SP, without Execute Immediate ? This constraint is FK referensing PK in another table.
Thanks

It is true for any DDL statement (which includes CREATE/DROP, of course).
By naked DDL he meant that DDL statements can not be placed within PL/SQL block just on their own (like other SQL statements - SELECT, INSERT, UPDATE etc...).
They need to be wrapped inside EXECUTE IMMEDIATE or for older Oracle versions using DBMS_SQL package.

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Oracle SQL Developer Data Modeler Import Log
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