RE: Using ALL_CONS_COLUMN view inside a function

From: Yasin Baskan <yasin.baskan_at_yapikredi.com.tr>
Date: Tue, 28 Aug 2007 09:19:43 +0300
Message-ID: <083667B535F3464CA0DD0D1DAFA4E3760E47B0C8@camexc1.kfs.local>

ALL_* views show information related to objects the user has access to. In which schema does your function reside? This function will return results based on the owner of the function. Try using dba_cons_columns.

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Brett Hammerlindl Sent: Tuesday, August 28, 2007 5:32 AM
To: oracle-l_at_freelists.org
Subject: Using ALL_CONS_COLUMN view inside a function

I hope someone can help me sort out something that makes no sense to me.

I have written an Oracle function that returns a VARCHAR2 (see below) You can see it has a cursor for a select of rows from the ALL_CONS_COLUMN view.

The function works fine when I run with p_owner set to the current user,

but I have hit a snag when I put in other owners.

Here is an example when I run my function with parameters of 'SYS' and 'REGISTRY_PK', it returns a NULL string because no rows are found. BUT when I run this select, I get 2 rows returned.   Select * from ALL_CONS_COLUMNS
   Where owner = 'SYS' and constraint_name = 'REGISTRY_PK'

When I hit this problem, I looked for the simplest case I could find that had a problem. It is based on the statement.   select count(*) cc from all_tables where owner = 'SYS'

The value returned inside a function is 27 while the query returns 703.

This is an Oracle 10g database. I am only using example with SYS as owner
since others can see if they get the same results. I had this problem with p_owner set other users as well.

Does anyone know what is going on?

How do I get a function to return a VARCHAR2 list the column names?

Thank you for the help, Brett

• this function generates a string to use in a SQL query
• the string concatenates all columns of constraint
• in order to have a single varchar to match CREATE OR REPLACE FUNCTION concatenateConstraintColumns(p_owner

VARCHAR2,   p_constraint_name
VARCHAR2)
  RETURN VARCHAR2 IS

  v_column VARCHAR2(40);
  v_sql    VARCHAR2(1000);
  v_join   VARCHAR2(12) := ' || ''|'' || ';

  cursor column_cursor is
    select *

      from all_cons_columns
     where owner = p_owner
       and constraint_name = p_constraint_name
     order by position;

BEGIN
  for column in column_cursor loop
    v_column := column.column_name;
    if (column.position = 1) then
      v_sql := v_column;
    else
      v_sql := v_sql || v_join || v_column;     end if;
  end loop;
  return v_sql;
END concatenateConstraintColumns;

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http://www.freelists.org/webpage/oracle-l Received on Tue Aug 28 2007 - 01:19:43 CDT