ORA-00900: invalid SQL statement error in procedure

Question

In procedure we referring only 2 tables
Tables:
1)     Edw_orders_ref
2)     Change_pl
Condisition:
1)     whenever edw_orders_ref.product=change_pl.product and edw_orders_ref.opt=change_pl.opt condisition satisfied then update edw_orders_ref.pl with change_pl.pl column.
2)     we pass table name and day values as arguments to the procedure.
3)     Based on day column data only we update.
4)     Heir day column means partisition values of the table
Procedure is:
create or replace procedure Proc_update_target(P_Day varchar2,p_tablename nvarchar2)
as
TYPE PlCurTyp IS REF CURSOR;
Pl_cv PlCurTyp;
--emp_rec  edw_orders_ref%ROWTYPE;
pl_rec Edw_orders_ref.pl%type;
product_rec Edw_orders_ref.product%type;
opt_rec Edw_orders_ref.opt%type;
sql_stmt varchar(3200);
n number:=0;
BEGIN
sql_stmt := 'select lpl.opt,lpl.product,lpl.pl from minddba.change_pl lpl
where exists ( select 1 from '|| p_tablename ||' where '||p_tablename||'.product=lpl.product and '||p_tablename||'.opt=lpl.opt
and '||p_tablename||'.day='||P_Day||' )';
dbms_output.put_line('hi');
OPEN pl_cv FOR sql_stmt ;
LOOP
dbms_output.put_line('hello1');
FETCH Pl_cv INTO pl_rec,product_rec,opt_rec;
EXIT WHEN Pl_cv%NOTFOUND;
dbms_output.put_line('hello');
execute immediate
'update '||p_tablename||' set pl=:rpl
where product=:rproduct
and opt=:ropt
AND day=:day' using pl_rec, product_rec,opt_rec,P_Day;
if Pl_cv%rowcount=10000 then
commit;
end if;
END LOOP;
CLOSE pl_cv;
commit;
exception
when others then
dbms_output.put_line('Error while updating target pl:'||SQLERRM);
end;
it is compile nad debug.
but execution time this error was coming
exec Proc_update_target('20110226','edw_orders_ref')
hi
hello1
hello
Error while updating target pl:ORA-00900: invalid SQL statement
i think in that procedure updata statement is wrong,if any one corect them.

Answer 1

Hi,
This are details of table structure and my requirement for that procedure
CREATE TABLE EDW_ORDERS_REF
SO_ID VARCHAR2(20 BYTE) NOT NULL,
SRC_SYS_KY NUMBER(19) NOT NULL,
DAY VARCHAR2(8 BYTE) NOT NULL,
FIN_CLOSE_DT VARCHAR2(8 BYTE) NOT NULL,
SO_LN_ITM_ID VARCHAR2(12 BYTE) NOT NULL,
EXT_EFF_TS VARCHAR2(26 BYTE) NOT NULL,
EFF_FRM_GMT_TS VARCHAR2(26 BYTE) NOT NULL,
CONTRA_FG VARCHAR2(1 BYTE) NOT NULL,
FDW_TRAN_TYPE_CD VARCHAR2(1 BYTE) NOT NULL,
SO4 VARCHAR2(4 BYTE),
SO2 VARCHAR2(2 BYTE),
PUR_AGMT VARCHAR2(20 BYTE),
SF VARCHAR2(6 BYTE),
V_BOX VARCHAR2(18 BYTE),
PL VARCHAR2(30 BYTE),
MCC_CD VARCHAR2(20 BYTE),
OPT VARCHAR2(18 BYTE),
ORDER_UNITS NUMBER(15,3),
SO_OPT_QTY NUMBER(10,3),
SO_DTL_EXT_QT NUMBER(15,3),
ORDER_LIST_LCY NUMBER(18,4),
ORDER_NET_LCY NUMBER(18,4),
ORDER_NET_CLC NUMBER(18,4),
ORDER_LIST_CLC NUMBER(18,4),
CURRENCY_CD VARCHAR2(2 BYTE),
SLS_CHNL_CD VARCHAR2(1 BYTE),
CBN VARCHAR2(20 BYTE),
GEOG_UNIT VARCHAR2(30 BYTE),
PRODUCT VARCHAR2(18 BYTE),
ORDER_NR VARCHAR2(20 BYTE),
ORDER_LINE_NR VARCHAR2(12 BYTE),
LOAD_DT DATE DEFAULT SYSDATE
CREATE TABLE MINDDBA.CHANGE_PL
PRODUCT VARCHAR2(18 BYTE) NOT NULL,
OPT VARCHAR2(3 BYTE) NOT NULL,
PL VARCHAR2(2 BYTE) NOT NULL
1)     whenever edw_orders_ref.product=change_pl.product and edw_orders_ref.opt=change_pl.opt condisition satisfied then update edw_orders_ref.pl with change_pl.pl column.
2)     we pass table name and day values as arguments to the procedure.
3)     Based on day column data only we update.
4)     Heir day column means partisition values of the table
When executing this one I got one error like
exec Proc_update_target('20110226','edw_orders_ref');
hi
hello1
hello
ORA-00900: invalid SQL statement