Why I Can't use procedure in select statement

We can use function in select statement but we couldn't use procedure with one out parameters in select statement... You can use Function because they are designed for this but procedure are not. Functions can return value (without OUT parameter) which can be used in SELECT whereas procedures do not have such concept. As you can see in the above post you can not call even functions also if it has any out parameter.
I have just trying to use procedure in select statement ..for this I require technical answer..The technical answer is because conceptually procedure is for doing set of operation, performning DMLs on the tables , whereas functions are for processing and producing a single result. Functions are basically for not using INSERT/UPDATE/DELETE in it. That is the reason they are allowed to be used in SELECT because conceptually they are not supposed to do any data changes.
Regards,
Avinash

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Using procedure in SELECT statement

I have a select statement that currently uses 4 functions to receive necessary values. All the functions are recursive and returns values from the same row.
What I would like to do is replace these for function calls with 1 procedure. Does anybody know if it possible to use a procedure in this way inside a select statement?
If so, do you have the syntax for doing this?
E.g
SELECT
Mdbrd_Pkg.calculate_fixed_charge_fn(in_rc_id, ap.CONFIGSET_ID) AS FIXED_CHARGE,
Mdbrd_Pkg.calculate_charge_rate_fn(in_rc_id, ap.CONFIGSET_ID) AS CHARGE_RATE,
Mdbrd_Pkg.tax_liable_fn(in_rc_id, ap.CONFIGSET_ID) AS TAX_LIABLE,
Mdbrd_Pkg.charge_unit_fn( in_rc_id, ap.CONFIGSET_ID) AS CHARGEUNIT_ID
FROM .....

This cannot be done. The part of the function used in the SELECT statement is the return value: procedures don't have return values (that's what makes tham procedures and not functions).
Obviously I don't know what your code does, but you should consider putting them into a single function that returns a TYPE with four attributes and then using the TABLE() function to cast them into something you could reference in the FROM clause of a correlated sub-query. Sounds a bit messy though.
Do these functions actually select data? Where does the recursion fit in?
Cheers, APC

How many columns can be used in the SELECT Statment

Hi all,
How many columns can be used in the SELECT statement?
Ex: SELECT x1,x2,....xn FROM <table_name>;
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Let me join ;-)
SQL> select * from v$version;
BANNER
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
PL/SQL Release 9.2.0.6.0 - Production
CORE    9.2.0.6.0       Production
TNS for Linux: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
SQL> DECLARE
2 l_sql varchar2(32000);
3 begin
4 l_sql := 'CREATE TABLE T(';
5 for i in 1..999 loop
6 l_sql := l_sql ||'C'||i||' NUMBER,
7 ';
8 end loop;
9 l_sql := l_sql||'C1000 NUMBER)';
10 EXECUTE IMMEDIATE l_sql;
11 end;
12 /
PL/SQL procedure successfully completed.
SQL> select count(*) from cols where table_name = 'T';
COUNT(*)
      1000
SQL> insert into t(c1) values(1);
1 row created.
SQL> select *
2 from t t1,t t2;
        C1         C2         C3         C4         C5         C6         C7         C8         C9
...   snipped
C991        C992       C993       C994       C995       C996       C997       C998       C999         C1         C2         C3       C4         C5         C6         C7         C8         C9        C10
...   snipped
C990       C991       C992       C993    C994        C995       C996       C997       C998       C999
---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------          1
                                                                                                                                    1
SQL>
SQL> select count(*) from (
2 select * from t t1,t t2)
3 ;
select * from t t1,t t2)
ERROR at line 2:
ORA-01792: maximum number of columns in a table or view is 1000Obviously, inline view is obliged the same restrictions as a view, but select list is not constrained.
Best regards
Maxim

Error by using database procedure in select statement

hi ,
I have built a database procedure having one parameter with in out varchar type. that return value with some addition.
i am using it with some column in select statement only for display purpuses but i am facing error by doing that in select statement. that procedure is working well with bind variable but not with select statement.
plz help me how i can use a procedure in select statement. or can i do it or not.

plz help me how i can use a procedure in select statement. or can i do it or not.A workaround could be to create a wrapper function for your procedure. One that only passes the input parameters and returns the output parameter.
The simply call this function in your select which internally calls the procedure.

Can we call a procedure in select statement?

Can we call a procedure in select statement?

Hi,
Raghu_appsdba wrote:
Can we call a procedure in select statement?No. You can call functions, but not procedures.
If the procedure does not change the database state (for example, it doesn't update any tables), then you can wrap it in a function, or re-write it as a function.
Here's an example of wrapping.
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RETURN VARCHAR2
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Can't use procedure in the .rdl file.

Hi experts,
I created a simple River project, and I can active the project successfully.
But when i added some codes to call a procedure, then i can't active the rdl file.
This is the code I used to call a procedure:
action callExternalProc2() : DecimalFloat[]
      let x = sap.hana.catalog.RIVERPRJ.MY_PROCEDURE_TEST3();
      return x;
The error message met when active the project is:
A transaction rollback may have left the object in an inconsistent state.
exception 40183:
repository/base/activation/activator.cpp:884
Transaction rollback detected. Activation failed.
When i commented the above codes, the activation will be successful.
And the procedure can execute in SQL console.
Can you give me some suggestions?

Hi Omer,
I tried to create my stored procedure in another schema(owned by my user), but I still can't active the rdl file.
Also, I can't execute the following sql statement using my user or the system user:
       set schema "RIVERPRJ";
       grant execute on MY_PROCEDURE_TEST3 to _SYS_REPO with grant option;
The error message is:
     Could not execute 'grant execute on MY_PROCEDURE_TEST3 to _SYS_REPO with grant option' in 10 ms 659 µs .
     SAP DBTech JDBC: [258] (at 17): insufficient privilege: Not authorized to grant the privilege on the procedure: line 1 col 18 (at pos 17)
If I active the rdl file, the error message is as follows:
In the procedure, if I do some queries from the tables created by the rdl, it did not work, but it works if I do some queries from the tables which were not created by the rdl file.
I think this maybe the reason for the error message "A transaction rollback may have left the object in an inconsistent state." .
In my opinion, I think we can not use a stored procedure that do some queries from tables created by the rdl entities.
Because create the entity and call the procedure at the same time may left the object in an inconsistent state.
Put the queries in an action is ok, but the river can not support some key words like "lag over",.
So i am trying to put these things in a procedure and call it in the action.
If we can't use procedure, how could I use some sql key words like "lag over"?
Could you give me some suggestions?
Thanks very much for your help.
Regards
Eric

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Why I Can't use procedure in select statement

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