Passing table names through variables

Hi All,
Is it possible to pass the table name in a query using a variable.
For example - can we perform a select on a table where the table name is passed using a variable.
Pl assist. Thanks.

Hello,
Are you wanting to do this in a procedure? Say the table name being passed in as Input Parameter?
We can do that using Dynamic SQL:
CREATE PROCEDURE "PROC_01"
(IN v_IN_Var1 NVARCHAR)
LANGUAGE SQLSCRIPT AS
BEGIN
    DECLARE ABC NVARCHAR(300) := NULL;
    ABC := 'SELECT * FROM ' || :v_IN_Var1;
    EXEC (:ABC);
END;
CALL PROC_01 ('DUMMY');
But the only thing is you'll not be able to see the result set directly.
You might wan2 fire the select to insert the data into a different table.

Similar Messages

Passing Table Name to Stored Procedure for From Clause

Is it possible to pass a table name to a stored procedure to be used in the From clause? I have the same task to perform with numerous tables and I'd like to use the same SP and just pass the table name in. Something like this:
=======================================
CREATE OR REPLACE PROCEDURE SP_TEST(
in_TABLE IN VARCHAR2,
AS
V_TABLE VARCHAR2(10);
BEGIN
V_TABLE := 'st_' || in_TABLE; -- in_TABLE is 2-3 character string
SELECT some_columns
INTO some_variables
FROM V_TABLE
WHERE some_conditions...;
END;
=======================================
I'm also using the passed table name to assign to variables in the Select and Where clauses. What I'm getting is an error that V_TABLE must be declared. When I hard code the table name, I don't get any errors, even though I'm also using the same method to assign values in the Select and Where clauses.
Thanks,
Ed Holloman

You need to use dynamic SQL whenever you are swapping out object names (tables, columns).
create or replace procedure sp_test
(in_table in varchar2)
is
-- variables
begin
execute immediate 'select a, b, c from st_' || in_table || ' where x = :xval and y = :yval'
into v_a, v_b, v_c using v_x, v_y;
end;

Passing TABLE NAME as parameter is possible or not?

I want develop a small/simple report like this
TABLE NAME :
WHERE :
ORDER BY :
QUERY ROWS
In the above model i want to pass all the three (TABLE NAME,WHERE and ORDER BY) as a parameter.
My doubt, is that possible to pass TABLE NAME as a parameter? If so!
When i enter any TABLE NAME it has to fetch me out the records of that table (Based on WHERE condition and ORDER BY).
Is that possible to do?
Need some help!
Edited by: Muthukumar Seshadri on Aug 10, 2012 6:19 PM

Yes, it is possible with lexical parameters. Look in the help for examples:
SELECT Clause
SELECT &P_ENAME NAME, &P_EMPNO ENO, &P_JOB ROLE FROM EMP
P_ENAME, P_EMPNO, and P_JOB can be used to change the columns selected at runtime. For example, you could enter DEPTNO as the value for P_EMPNO on the Runtime Parameter Form.
Note that in this case, you should use aliases for your columns. Otherwise, if you change the columns selected at runtime, the column names in the SELECT list will not match the Report Builder columns and the report will not run.
FROM Clause
SELECT ORDID, TOTAL FROM &ATABLE
ATABLE can be used to change the table from which columns are selected at runtime. For example, you could enter ORD for ATABLE at runtime.
If you dynamically change the table name in this way, you may also want to use lexical references for the SELECT clause (look at the previous example) in case the column names differ between tables.
WHERE Clause
SELECT ORDID, TOTAL FROM ORD WHERE &CUST
ORDER BY Clause
SELECT ORDID, SHIPDATE, ORDERDATE, TOTAL FROM ORD ORDER BY &SORT You have to be really careful with this approach. Dynamic SQL may cause serious performance problems.
Edited by: InoL on Aug 10, 2012 10:06 AM

Pass table name as a parameter to function

Is there a way to pass table name as a parameter to functions? Then update the table in the function.
Thanks a lot.
Jiaxin

Hi, Harm,
Thank you very much for your suggestion and example. But to get my program work, i need to realise code like follows:
CREATE OR REPLACE FUNCTION delstu_func(stuno char) RETURN NUMBER AS
BEGIN
EXECUTE IMMEDIATE 'DELETE FROM student s' ||
'WHERE' || 's.student_number' || '=' || stuno;
LOOP
DBMS_OUTPUT.PUT_LINE('record deleted');
END LOOP;
END;
SELECT delstu_func('s11') FROM STUDENT;
The intention is to check if such a function can perform operations such as update, delete and insert on occurence of certain values. When executing the above statement, the system returns an error message:
ERROR at line 1:
ORA-00933: SQL command not properly ended
ORA-06512: at "SCMJD1.DELSTU_FUNC", line 3
Could you tell me where is wrong?
Jiaxin

Pass table name as parameter in prepared Statement

Can I pass table name as parameter in prepared Statement
for example
select * from ? where name =?
when i use setString method for passing parameters this method append single colon before and after of this parameter but table name should be send with out colon as SQL Spec.
I have another way to make sql query in programing but i have a case where i have limitation of that thing so please tell me is it possible with prepared Statment SetXXx methods or not ?
Thanks
Haroon Idrees.

haroonob wrote:
I know ? is use for data only my question is this way to pass table name as parameterI assume you mean "how can I do it?" As I have already answered "is this the way?" with no.
Well, I would say (ugly as it is) String concatenation, or stored procedures.

How to pass attribute values through variables in JSP Custom TagLib

Hi,
Can anybody help me how to pass values through varuables in the jsp custom tag.
i am using JSP custom tag. I am unable to pass attribute values through variables.
<invitation:invdetails invid="<%=invid%>"/> The value is passing as <%=invid%> ,not value of the invid.
But i am getting throuh the fllowing
<invitation:invdetails invid='1' />
Please anybody suggest me how to pass value by using the variable.

Hi,
It sounds like you need to set the <rtexprvalue> tag to true in the TLD for your tag. If you do this the tag will read in the value you are trying to pass to it.
dapanther...

JSP sql - set table name in variable

I'm trying to set my table name in variable, what is the syntax in sql of selecting from a table which name is set with a variable name?

That's easy :
Say, ur table name is MY_TABLE.
Now, set a variable say x as :
var x = "MY_TABLE"; (Javascript)
or
String x = "MY_TABLE" (JSP/Servlet);
Finally, use the SQL as,
String SQL = "SELECT * FROM " + x + "WHERE condition". (JSP/Servlet).
or
var SQL = "SELECT * FROM " + x + "WHERE condition". (Javascript).
and BINGO !!
Do keep me posted.
Cheers !!
Sherbir

Passing table name to a procedure and then need to open a cursor ..

Hi All,
I have been out of touch in plsql for sometime and need to do something like :
passing table name to a procedure while calling(fp_table_old captures this value) and then need to open a cursor for this table in 'for i in (select * from fp_table_old )', one of the ways I tried is : for i in (execute immediate Lv_sql_query ) but its not working for me, please find the code below for reference, I know I am sounding stupid but I have been very out of touch, please help.
code :
create procedure p_table_compare(fp_table_old in varchar2, fp_table_new in varchar2)
as
Lv_sql_query varchar2(2000);
begin
     Lv_sql_query := 'select * from '||fp_table_old;
     for i in (Lv_sql_query)
     loop
          dbms_output.put_line(i.employee_id);
     end loop;
end;
Regards
Rahul

if I am doing something like this : for i in (execute immediate Lv_sql_query)
I am getting an error which is :
PLS-00103: Encountered the symbol "IMMEDIATE" when expecting one of the following:
. ( ) , * @ % & | = - + < / > at in is mod remainder not
range rem => .. <an exponent (**)> <> or != or ~= >=
My code:
create or replace procedure p_table_compare(fp_table_old in varchar2, fp_table_new in varchar2)
as
Lv_sql_query varchar2(2000);
begin
     --dbms_output.put_line('Hello World');
     Lv_sql_query := 'select * from '||fp_table_old;
     for i in (execute immediate Lv_sql_query)
     loop
          dbms_output.put_line(i.employee_id);
     end loop;
end;
Please help.
Regards
Rahul

Pass table name to procedure

hi
Can any one plz suggest me , how to pass
table name (that would be varchar) to a procedure,such that i
should be able to do DML and DDL on the table refered !!

EXECUTE IMMEDIATE executes the SQL statement held in a specified
VARCHAR2. So, with a bit of string concatenation, you can make
the statement dynamic, thus:
EXECUTE IMMEDIATE 'DELETE * FROM emp' ;
could become:
EXECUTE IMMEDIATE 'DELETE * FROM '||p_table_name ;
where p_table_name is a VARCHAR2 parameter passed into your
procedure. Check out the PL/SQL User's Guide and Reference,
chapter 10, for full details.

Invalid table name when pass in the table name as variable in dynamic sql

Hi,
I need to create a stored procedure which will return a list of data to my java application like the following.
first, select the table name from the first table.
For example : SELECT T_NAME FROM MDR_SMSTABLES
second, select the data from the table which returned by first select statement
For example : SELECT * FROM T_NAME.
I use dynamic sql with cursor to select the data. But it returns "java.sql.SQLException: ORA-00903: invalid table name"
I fetch the table name to varchar2. I think this might the cause it returns me the this error. But i don't know what type should i put for the table name other then varchar2.
val2 VARCHAR2(200);
OPEN cv FOR
SELECT T_NAME FROM MDR_SMSTABLES WHERE T_DATE=d_dt_sent;
FETCH cv INTO val2;
WHILE cv%FOUND
LOOP
OPEN refcur FOR
'SELECT * FROM :t WHERE MID = :m' USING val2, msg_id;
EXIT WHEN refcur IS NOT NULL;
FETCH cv INTO val2;
END LOOP;
As my stored procedure is quite long, so i just paste some of the code here. Hope the information is enough. Can anyone please help?
Thanks

DECLARE
val2 VARCHAR2 (200);
cv sys_refcursor;
refcur sys_refcursor;
BEGIN
OPEN cv FOR
SELECT table_name
FROM user_tables
WHERE table_name IN ('EMP', 'DEPT');
FETCH cv INTO val2;
WHILE cv%FOUND
LOOP
OPEN refcur FOR 'SELECT * FROM '||val2;
EXIT WHEN refcur IS NOT NULL;
FETCH cv INTO val2;
END LOOP;
END;

Passing table name to a report.

I am designing an application that will draw data from any of a number of different tables (all with different data formats, but the same column names), and wish for this data to be displayed in a report. In the table that contains the selection criteria, I have included columns for schema name and table name. How can I pass these values into the report, and in turn, into a graph?
I've tried this, but it doesn't work.
SELECT data_column FROM
:schema_column.:data_column;

HI ,
the table name can be easily passed on to the sql use lexicaly parameter as below
SELECT data_column FROM
&table_name where &where_clause
once you write this query it will give you a message that a bind variable was created . Now you can assign value to this through parameter form or write a code in the after parameter form trigger and also generate the where clause if required .
do you have same column name in different tables with different data types ?? if so then i really dont know how to solve this problem other wise it should not be a problem
bye
sudhir

Passing Table name as parameter to proc.

Hi,
I need to know how to pass a table name to a oracle procedure.
In that procedure I will put that table name in a variable and then I will make operations on that table like DELETE, UPDATE and INSERT.
Kinldy give me the solution for the above problem as soon as possible..
Thanks & regards,
Kiran

You shouldn't do it, but if you do, you can use something like this:
Anton
create or replace type my_parm as object
( name varchar2(30)
, val anydata
create or replace type my_parms as table of my_parm
create table t1( c1 number, c2 varchar2(10), c3 date )
create or replace procedure doital( p_action in varchar2, p_tab in varchar2, parms in my_parms )
is
p_stmt1 varchar2(32000);
p_stmt2 varchar2(32000);
ind pls_integer;
curs integer;
dummy integer;
t_a anytype;
t_v varchar2(32000);
t_n number;
t_d date;
begin
curs := dbms_sql.open_cursor;
if upper( p_action ) = 'I'
then
    ind := parms.first;
    loop
      exit when ind is null;
      p_stmt1 := p_stmt1 || ', ' || parms( ind ).name;
      p_stmt2 := p_stmt2 || ', :b' || to_char( ind );
      ind := parms.next( ind );
    end loop;
    p_stmt1 := 'insert into ' || p_tab || ' (' || substr( p_stmt1, 2 ) || ' ) values (' || substr( p_stmt2, 2 ) || ' )';
    dbms_sql.parse( curs, p_stmt1, dbms_sql.native );
    ind := parms.first;
    loop
      exit when ind is null;
      case parms( ind ).val.GetType( t_a )
        when dbms_types.typecode_varchar2
        then
          dummy := parms( ind ).val.GetVarchar2( t_v );
          dbms_sql.bind_variable( curs, ':b' || to_char( ind ), t_v );
        when dbms_types.typecode_number
        then
          dummy := parms( ind ).val.GetNumber( t_n );
          dbms_sql.bind_variable( curs, ':b' || to_char( ind ), t_n );
        when dbms_types.typecode_date
        then
          dummy := parms( ind ).val.GetDate( t_d );
          dbms_sql.bind_variable( curs, ':b' || to_char( ind ), t_d );
      end case;
      ind := parms.next( ind );
    end loop;
end if;
dummy := dbms_sql.execute( curs );
dbms_sql.close_cursor( curs );
end;
begin
doital( 'I', 't1', my_parms( my_parm( 'c2', anydata.ConvertVarchar2( 'testje' ) )
                             , my_parm( 'c1', anydata.ConvertNumber( 3 ) )
                             , my_parm( 'c3', anydata.ConvertDate( sysdate ) )
doital( 'I', 't1', my_parms( my_parm( 'c1', anydata.ConvertNumber( 77 ) )
                             , my_parm( 'c2', anydata.ConvertVarchar2( 'goedzo' ) )
                             , my_parm( 'c3', anydata.ConvertDate( sysdate - 5 ) )
end;
/

Passing table names as parameters (aka Trouble building a dynamic SQL command)

I am attempting to develop a template for publishing some data, and would like to pass standard table names as parameters to the various queries. What I have created generates the following error:
Msg 137, Level 16, State 1, Procedure spPublishTrans_FlashersCaution, Line 68
Must declare the scalar variable "@tmpTable".
I thought I was declaring it properly ?
Thanks.
DECLARE @FeatureClass as Nvarchar(MAX) = 'Trans_FlashersCaution'
DECLARE @ED as Nvarchar(MAX) = 'edgis.dbo.' + @FeatureClass
DECLARE @tmpTable TABLE
[OBJECTID] [int] NOT NULL,
[Id] [int] NULL,
[Location] [nvarchar](60) NULL,
[Zone] [nvarchar](5) NULL,
[Shape] [geometry] NULL
DECLARE @tmpTableParam AS NVARCHAR (MAX) = @tmpTable
SELECT @tmpTableParam
DECLARE @execquery AS NVARCHAR(MAX)
SET @execquery = 'INSERT INTO' + @tmpTableParam +
[OBJECTID]
,[Id]
,[Location]
,[Zone]
,[Shape]
SELECT
[OBJECTID]
,[Id]
,[Location]
,[Zone]
,[Shape]
FROM' + @ED;
EXECUTE sp_executesql @execquery

Always PRINT the SQL string prior to execution when developing dynamic SQL script:
PRINT @execquery
--EXECUTE sp_executesql @execquery
Second step, test the printed SQL script for validity.
Dynamic SQL: http://www.sqlusa.com/bestpractices/dynamicsql/
Kalman Toth Database & OLAP Architect
SQL Server 2014 Database Design
New Book / Kindle: Beginner Database Design & SQL Programming Using Microsoft SQL Server 2014

Read table, table name in variable

Hi all,
I am try trying to do the following.
Select statement to get the table name --> store in tname (variable).
Now, I have to do a select to read the data in this table (table name is in tname variable) based on some conditions
How do I do this?
1st step
     Select ME_TECH from RSAC into tname
        where NAME = 'PLANT'
              and DATEFROM <= ldate
              and DATETO >= ldate.
2nd step??
Thanks,
Anirudh.

report ztest.
parameters: p_table type dd02l-tabname.
field-symbols: <fs> type standard table." of (p_table).
select * from (p_table)
into table <fs>
up to 20 rows.
There is another way using CL_ALV_TABLE_CREATE, for this you have to pass the fieldcatalog.
it return the internal table reference. using that you can proceed.

How to pass table name as argument to cursor

please help me how to solve this.
SQL> select c1 from test ;
C1
1
7
18
4
10
28
30
I'm able to execute this.
SQL> get b
1 set serveroutput on size 2000
2 declare
3 cursor c1 is
4 select c1 from test ;
5 begin
6 for rec in c1
7 loop
8 dbms_output.put_line(rec.c1);
9 end loop;
10* end;
SQL> sta b
1
7
18
4
10
28
30
When I change the above cursor to accept the parameter it is not working.
SQL> get c
1 set serveroutput on size 2000
2 declare
3 cursor c1(p_table varchar2) is
4 select c1 from p_table ;
5 begin
6 for rec in c1('test')
7 loop
8 dbms_output.put_line(rec.c1);
9 end loop;
10* end;
ERROR at line 3:
ORA-06550: line 3, column 18:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 3, column 3:
PL/SQL: SQL Statement ignored
ORA-06550: line 7, column 25:
PLS-00364: loop index variable 'REC' use is invalid
ORA-06550: line 7, column 4:
PL/SQL: Statement ignored

You cannot use a (bind) variable in SQL for an object name (i.e. a table name, column name, etc).
Why?
The SQL engine needs to parse the SQL. Part of the parse is to resolve the scope to determine what objects are being reference. It needs to check that the column names referred to is indeed in that object. Etc.
Then these objects are used to determine the best execution path to run the SQL. What indexes do the objects have? Is the object a partitioned table and the partition criteria used in the predicate? Etc.
How can the SQL engine perform any of these when you pass it a table name that is a parameter?
The name of an object (such as the table being selected from) must be explicitly stated in a SQL statement. It cannot be variable.

Passing table names through variables

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