Calling an Oracle PL/SQL procedure in Java using a CallableStatement with a boolean IN parameter gives an PLS-00306 oracle error:

Question

I have a pl/sql procedure on an Oracle 11g that has the following parameters:

PROCEDURE validate_product
   ( product_id_in IN varchar2 , 
     username_in in va         


        

Answer 1

Starting with Oracle 12.2 there is a JDBC Support for Binding PLSQL_BOOLEAN

I'll demonstrate is on a simple procedure with INand OUT BOOLEAN parameters

create or replace PROCEDURE proc_C (flag_in BOOLEAN, flag_out OUT BOOLEAN) as
begin
  flag_out := flag_in;
end;
/

Unfortunately it is not possible to use directly setBoolean to bind the first parameter.

The driver Version 19.3.0.0.0 returns in this case PLS-00306: wrong number or types of arguments in call to 'PROC_C'

The workaround is simple using setObject(1,true,oracle.jdbc.OracleTypes.PLSQL_BOOLEAN)

The whole example

stmt = con.prepareCall("{ call proc_C(?,?)}") 
stmt.setObject(1,false,oracle.jdbc.OracleTypes.PLSQL_BOOLEAN)
stmt.registerOutParameter(2, oracle.jdbc.OracleTypes.PLSQL_BOOLEAN) 
stmt.execute()
flag = stmt.getBoolean(2)