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Editorial Team
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Asked: 2026-06-14T18:23:14+00:00

Why doesn’t my dynamic sql procedure work? All I’m trying to do is show

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Why doesn’t my dynamic sql procedure work? All I’m trying to do is show a simple column from a table. I get the following erros:

ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00905: object SYSTEM.JOIN is invalid
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

 create or replace procedure join
(p_table1 in varchar2,
p_joincolumn1 in varchar2,
p_joincolumn2 in varchar2)
 AS
lv_query varchar2(500);
lv_cursor number;
lv_col1 VARCHAR2(30);
lv_col2 VARCHAR2(30);
loopcount number:=0;
cursor_return_value integer;
 begin
lv_cursor:=dbms_sql.open_cursor;
dbms_output.put_line('Value assigned to cursor= ' || lv_cursor );
lv_query:='select p_joincolumn1 from p_table1';
dbms_output.put_line(lv_query);
dbms_sql.parse(lv_cursor, lv_query, dbms_sql.native);
dbms_sql.define_column (lv_cursor, 1, lv_col1);
dbms_sql.define_column (lv_cursor, 2, lv_col2);
cursor_return_value := dbms_sql.execute (lv_cursor);
LOOP
    loopcount:=loopcount+1;
    dbms_output.put_line('loopcount= ' || loopcount );
    if dbms_sql.fetch_rows (lv_cursor)=0 then
        EXIT;
    end if;

    dbms_sql.column_value(lv_cursor, 1, lv_col1);
    dbms_sql.column_value (lv_cursor, 2, lv_col2);
    dbms_output.put_line(lv_col1 || '   ' || lv_col2 ); 
END LOOP;
 dbms_output.put_line('At end of loop');
 dbms_sql.close_cursor(lv_cursor);
 end;
 /

 execute join ('PROJECT', 'PROJECT.P_ID', 'PROJECT.SKILL_ID');

Errors:

 Procedure created.

 SQL> 
 SQL> execute testing_j ('PROJECT', 'PROJECT.P_ID', 'PROJECT.SKILL_ID');
 Value assigned to cursor= 20
 select p_joincolumn1 from p_table1
 BEGIN testing_j ('PROJECT', 'PROJECT.P_ID', 'PROJECT.SKILL_ID'); END;

 *
 ERROR at line 1:
 ORA-00942: table or view does not exist
 ORA-06512: at "SYS.DBMS_SYS_SQL", line 906
 ORA-06512: at "SYS.DBMS_SQL", line 39
 ORA-06512: at "SYSTEM.TESTING_J", line 17
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1 Answer

  1. Editorial Team

    Fixed my code, and it works now. Changed dbms_sql.native to dbms_sql.v7, and also changed some syntax. 

    create or replace procedure testing_j
(table_name in varchar2,
column1 in varchar2)
AS
lv_query varchar2(500);
lv_cursor number;
lv_col1 number(6);
loopcount number:=0;
cursor_return_value integer;
begin
lv_cursor:=dbms_sql.open_cursor;
dbms_output.put_line('Value assigned to cursor= ' || to_char(lv_cursor));
lv_query:='SELECT ' || column1 || ' FROM ' || table_name;
dbms_output.put_line(lv_query);
dbms_sql.parse(lv_cursor, lv_query, dbms_sql.v7);



dbms_sql.define_column (lv_cursor, 1, lv_col1);
cursor_return_value := dbms_sql.execute (lv_cursor);
LOOP
    loopcount:=loopcount+1;
    --dbms_output.put_line('loopcount= ' || loopcount );
    if dbms_sql.fetch_rows (lv_cursor)=0 then
        EXIT;
    end if;

    dbms_sql.column_value(lv_cursor, 1, lv_col1);
    dbms_output.put_line(lv_col1);  
END LOOP;
dbms_output.put_line('At end of loop');
dbms_sql.close_cursor(lv_cursor);
end;
/


PL/SQL procedure successfully completed.

SQL> execute testing_j ('PROJECT', 'PROJECT.P_ID');
Value assigned to cursor= 12
SELECT PROJECT.P_ID FROM PROJECT
1
1
2
3
3
4
4
5
5
6
7
7
At end of loop

PL/SQL procedure successfully completed.
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