Sql statement in a table not accepting variable

Question

I have the following problem on 10.1.0.3.0 with varialbe in an execute immediate statement
here is the code that I am using
declare
remote_data_link varchar2(25) := 'UDE_DATATRANSFER_LINK';
FROM_SCHEMA VARCHAR2(40) := 'UDE_OLTP';
l_last_process_date date := to_date(to_char(sysdate,'mm-dd-yyyy hh:mi:ss'),'mm-dd-yyyy hh:mi:ss') - 1;
stmt varchar2(4000) := 'MERGE into applicant_adverseaction_info theTarget USING (select * from '||FROM_SCHEMA||'.applicant_adverseaction_info@'||remote_data_link||' where last_activity > :l_last_process_date ) theSource ON(theTarget.applicant_id = theSource.applicant_id) WHEN MATCHED THEN UPDATE SET theTarget.cb_used = theSource.cb_used, theTarget.cb_address = theSource.cb_address, theTarget.scoredmodel_id = theSource.scoredmodel_id, theTarget.last_activity = theSource.last_activity WHEN NOT MATCHED THEN INSERT(CB_USED, CB_ADDRESS, SCOREDMODEL_ID, APPLICANT_ID, LAST_ACTIVITY) values(theSource.cb_used, theSource.cb_address, theSource.scoredmodel_id, theSource.applicant_id, theSource.last_activity)';
stmt2 varchar2(4000) := 'MERGE into edm_application theTarget USING (select * from '||from_schema||'.edm_application@'||remote_data_link||' where last_activity > :l_last_process_date) theSource ON (theTarget.edm_appl_id = theSource.edm_appl_id) WHEN MATCHED THEN UPDATE SET theTarget.APP_REF_KEY = theSource.APP_REF_KEY, theTarget.IMPORT_REF_KEY = theSource.IMPORT_REF_KEY, theTarget.LAST_ACTIVITY = theSource.LAST_ACTIVITY WHEN NOT MATCHED THEN INSERT (EDM_APPL_ID, APP_REF_KEY, IMPORT_REF_KEY, LAST_ACTIVITY) values(theSource.EDM_APPL_ID, theSource.APP_REF_KEY, theSource.IMPORT_REF_KEY, theSource.LAST_ACTIVITY)';
v_error varchar2(4000);
T_MERGE VARCHAR2(4000);
stmt3 varchar2(4000);
BEGIN
select merge_sql
INTO T_MERGE
from transfertables
where table_name= 'edm_application';
remote_data_link:= 'UDE_DATATRANSFER_LINK';
FROM_SCHEMA := 'UDE_OLTP';
--DBMS_OUTPUT.PUT_LINE(SUBSTR(stmt2,1,200));
--STMT2 := T_MERGE;
dbms_output.put_line(from_schema||' '||remote_data_link||' '||l_last_process_date);
EXECUTE IMMEDIATE stmt2 using l_last_process_date;
--execute immediate stmt3 ;
dbms_output.put_line(from_schema||' '||remote_data_link||' '||l_last_process_date);
dbms_output.put_line(substr(stmt2,1,200));
commit;
EXCEPTION
WHEN OTHERS THEN
V_ERROR := SQLCODE||' '||SQLERRM;
v_ERROR := V_ERROR ||' '||SUBSTR(stmt2,1,200);
DBMS_OUTPUT.PUT_LINE(V_ERROR);
--dbms_output.put_line(substr(stmt2,1,200));
END;
This works perfectly
but if I change it to get the same statement in a db table
declare
remote_data_link varchar2(25) := 'UDE_DATATRANSFER_LINK';
FROM_SCHEMA VARCHAR2(40) := 'UDE_OLTP';
l_last_process_date date := to_date(to_char(sysdate,'mm-dd-yyyy hh:mi:ss'),'mm-dd-yyyy hh:mi:ss') - 1;
stmt varchar2(4000) := 'MERGE into applicant_adverseaction_info theTarget USING (select * from '||FROM_SCHEMA||'.applicant_adverseaction_info@'||remote_data_link||' where last_activity > :l_last_process_date ) theSource ON(theTarget.applicant_id = theSource.applicant_id) WHEN MATCHED THEN UPDATE SET theTarget.cb_used = theSource.cb_used, theTarget.cb_address = theSource.cb_address, theTarget.scoredmodel_id = theSource.scoredmodel_id, theTarget.last_activity = theSource.last_activity WHEN NOT MATCHED THEN INSERT(CB_USED, CB_ADDRESS, SCOREDMODEL_ID, APPLICANT_ID, LAST_ACTIVITY) values(theSource.cb_used, theSource.cb_address, theSource.scoredmodel_id, theSource.applicant_id, theSource.last_activity)';
stmt2 varchar2(4000) := 'MERGE into edm_application theTarget USING (select * from '||from_schema||'.edm_application@'||remote_data_link||' where last_activity > :l_last_process_date) theSource ON (theTarget.edm_appl_id = theSource.edm_appl_id) WHEN MATCHED THEN UPDATE SET theTarget.APP_REF_KEY = theSource.APP_REF_KEY, theTarget.IMPORT_REF_KEY = theSource.IMPORT_REF_KEY, theTarget.LAST_ACTIVITY = theSource.LAST_ACTIVITY WHEN NOT MATCHED THEN INSERT (EDM_APPL_ID, APP_REF_KEY, IMPORT_REF_KEY, LAST_ACTIVITY) values(theSource.EDM_APPL_ID, theSource.APP_REF_KEY, theSource.IMPORT_REF_KEY, theSource.LAST_ACTIVITY)';
v_error varchar2(4000);
T_MERGE VARCHAR2(4000);
stmt3 varchar2(4000);
BEGIN
select merge_sql
INTO T_MERGE
from transfertables
where table_name= 'edm_application';
remote_data_link:= 'UDE_DATATRANSFER_LINK';
FROM_SCHEMA := 'UDE_OLTP';
--DBMS_OUTPUT.PUT_LINE(SUBSTR(stmt2,1,200));
STMT2 := T_MERGE;
dbms_output.put_line(from_schema||' '||remote_data_link||' '||l_last_process_date);
EXECUTE IMMEDIATE stmt2 using l_last_process_date;
--execute immediate stmt3 ;
dbms_output.put_line(from_schema||' '||remote_data_link||' '||l_last_process_date);
dbms_output.put_line(substr(stmt2,1,200));
commit;
EXCEPTION
WHEN OTHERS THEN
V_ERROR := SQLCODE||' '||SQLERRM;
v_ERROR := V_ERROR ||' '||SUBSTR(stmt2,1,200);
DBMS_OUTPUT.PUT_LINE(V_ERROR);
--dbms_output.put_line(substr(stmt2,1,200));
END;
I get ora-00900 invalid sql statement
can somebody explain why this happens
Thanks

Answer 1

I agree with jan and anthony. Your post is too long and ill-formatted. However here's my understanding of your problem (with examples though slightly different ones).
1- I have a function that returns number of records in a any given table.
  1  CREATE OR REPLACE FUNCTION get_count(p_table varchar2)
  2     RETURN NUMBER IS
  3     v_cnt number;
  4  BEGIN
  5    EXECUTE IMMEDIATE('SELECT count(*) FROM '||p_table) INTO v_cnt;
  6    RETURN v_cnt;
  7* END;
SQL> /
Function created.
SQL> SELECT get_count('emp')
  2  FROM dual
  3  /
GET_COUNT('EMP')
              14
2- I decide to move the statement to a database table and recreate my function.
SQL> CREATE TABLE test
  2  (stmt varchar2(2000))
  3  /
Table created.
SQL> INSERT INTO test
  2  VALUES('SELECT count(*) FROM p_table');
1 row created.
SQL> CREATE OR REPLACE FUNCTION get_count(p_table varchar2)
  2     RETURN NUMBER IS
  3     v_cnt number;
  4     v_stmt varchar2(4000);
  5  BEGIN
  6     SELECT stmt INTO v_stmt
  7     FROM test;
  8     EXECUTE IMMEDIATE(v_stmt) INTO v_cnt;
  9     RETURN v_cnt;
10  END;
11  /
Function created.
SQL> SELECT get_count('emp')
  2  FROM dual
  3  /
SELECT get_count('emp')
ERROR at line 1:
ORA-00942: table or view does not exist
ORA-06512: at "SCOTT.GET_COUNT", line 8
ORA-06512: at line 1
--p_table in the column is a string and has nothing to do with p_table parameter in the function. And since there's no p_table table in my schema function returns error on execution. I suppose this is what you mean by "sql statement in a table not accepting variable"
3- I rectify the problem by recreating the function.
  1  CREATE OR REPLACE FUNCTION get_count(p_table varchar2)
  2     RETURN NUMBER IS
  3     v_cnt number;
  4     v_stmt varchar2(4000);
  5  BEGIN
  6     SELECT replace(stmt,'p_table',p_table) INTO v_stmt
  7     FROM test;
  8     EXECUTE IMMEDIATE(v_stmt) INTO v_cnt;
  9     RETURN v_cnt;
10* END;
SQL> /
Function created.
SQL> SELECT get_count('emp')
  2  FROM dual
  3  /
GET_COUNT('EMP')
              14
Hope this gives you some idea.-----------------------
Anwar