oracle - ORA-01722: invalid number on Entity Framework -


i'm executing stored procedure oracle db is:

procedure get_tim_user_custo(p_anomes in varchar, user_custo out sys_refcursor)          begin      open user_custo     select id, cod_utilizador,ano_mes,         to_number(desencriptar_dado(custo, (select valor                                  tim_config                                 parametro='cript_key'))) custo,         to_number(desencriptar_dado(custo_extra, (select valor                                  tim_config                                 parametro='cript_key'))) custo_extra    tim_user_custo         substr(p_anomes, 1, 4)=substr(ano_mes, 1, 4);   end get_tim_user_custo;

if execute on oracle directly returns result set well. if call stored procedure in webservice using entity framework

ora-01722: invalid number

calling: 

objectresult<user_custo> aux = context.tim_functions_get_tim_user_custo(sanomes);

then throws exception, doesn't give result.

using stored procedure entity can extremely complicated thing, i've been extremely frustrated when first tried. works in entity... exept stored procedure... anyway. if 1 of these can you, realy suggest read these questions/answers below , try find way out of this, luck !

using stored procedure in entity framework

getting data stored procedure entity framework

sql stored proc , entity framework 6


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