oracle - Error while wrappin PLSQL procedure please help me -

i facing error while wrapping plsql procedure. below code , error

actual function:

create or replace function column_job_salary_restriction(     v_schema        in varchar2,     v_object        in varchar2     ) return varchar2              v_sql varchar2(100);         begin     if lower( sys_context( 'userenv', 'session_user') ) = 'user2'             v_sql := '0 = 1';         end if;             return v_sql; end; 

/

wrapping code:

declare        input dbms_sql.varchar2s;        output dbms_sql.varchar2s;        begin        input(1) := 'create or replace function column_job_salary_restriction( v_schema in varchar2, v_object in varchar2) return varchar2 is';        input(2) := 'v_sql varchar2(100) := null;';      input(3) := 'begin';    input(4) := 'if lower(sys_context("userenv","session_user")) = "user2" then';        input(5) := 'v_sql := '0 = 1';';    input(6) := 'end if;';           input(7) := 'return v_sql';        input(8) 'end;';        sys.dbms_ddl.create_wrapped(ddl => input,                                                                         lb  => 1,                                                                         ub  => input.count);        end; 

/

error:

error @ line 9: ora-06550: line 9, column 35: pls-00103: encountered symbol "0" when expecting 1 of following: * & = - + ; < / > @ in mod remainder not rem <an exponent (**)> <> or != or ~= >= <= <> , or like2 like4 likec between || multiset member submultiset 

---

after executing exec column_job_salary_restriction

error @ line 1: ora-06550: line 1, column 7: pls-00306: wrong number or types of arguments in call 'column_job_salary_restriction' ora-06550: line 1, column 7: pl/sql: statement ignored 

please me new plsql.

about pls-00103:

input(5) := 'v_sql := '0 = 1';'; 

should be:

input(5) := 'v_sql := ''0 = 1'';'; 

the double-quote 1 way escape quote inside string.

about pls-00306:

declare   v_ret varchar2(100); begin   v_ret := column_job_salary_restriction('foo', 'bar'); end; / 

it function have bind return value variable , have give values input parameters.