How to store pl/sql statement in varchar and call EXEC on it?

Question

So this statement works:
SELECT column_name BULK COLLECT INTO table_column_list FROM all_tab_columns WHERE table_name = conv_tablename AND OWNER IN (SELECT USER FROM DUAL);
However I want to add conditions like " AND column_name <> 'abc' " at the end. So i tried to store this in a varchar and call EXEC on it:
select_column_value_sql_stmt := 'SELECT column_name BULK COLLECT INTO table_column_list FROM user_tab_columns WHERE table_name = '''|| conv_tablename || '''' || inexclude_column;
          EXECUTE IMMEDIATE select_column_value_sql_stmt;     
No matter how I concatenate the conv_tablename part, i get an error. either invalid identifier or unimplemented feature.
so is there a way to do this at all?
Thanks in advance.

Answer 1

Welcome to the forum!
Wheneve you post provide your 4 digit Oracle version (result of SELECT * FROM V$VERSION).
>
So this statement works:
SELECT column_name BULK COLLECT INTO table_column_list FROM all_tab_columns WHERE table_name = conv_tablename AND OWNER IN (SELECT USER FROM DUAL);
However I want to add conditions like " AND column_name 'abc' " at the end. So i tried to store this in a varchar and call EXEC on it:
select_column_value_sql_stmt := 'SELECT column_name BULK COLLECT INTO table_column_list FROM user_tab_columns WHERE table_name = '''|| conv_tablename || '''' || inexclude_column;
EXECUTE IMMEDIATE select_column_value_sql_stmt;
No matter how I concatenate the conv_tablename part, i get an error. either invalid identifier or unimplemented feature.
so is there a way to do this at all?
>
Yes - you can do it but the syntax is different for BULK COLLECT when using EXECUTE IMMEDIATE; the INTO goes AFTER the query, not within it.
See the example code at this link
http://unix-oracle-11g.blogspot.com/2011/03/dynamic-sql-execute-immediate-bulk.html
  -- example of dynamic sql with bull collect
  v_sql_stmt := 'SELECT sal FROM emp_t';
  EXECUTE IMMEDIATE v_sql_stmt BULK COLLECT INTO vc_sal;So you won't be able to use a common set of queries for normal vs execute immediate.