ADD_DIMENSION_MEMBER

The ADD_DIMENSION_MEMBER program adds a member to an OLAP cube dimension. An OLAP cube dimension (sometimes also called an "OLAP logical dimension") is an OLAP dimension that is defined as a first-class data object in the Oracle data dictionary.

Note:

You cannot use this program to modify a cube dimension if a materialized view exists for that cube dimension or any cube in which it participates.

parent_member_id

A text expression that specifies the value of the member which is the parent of the member that you want to add to the cube dimension. When you want to add the member as the top member of a hierarchy, specify NA.

auto_compile

A Boolean expression that specifies whether or not you want related analytic workspace objects (for example, he parent relation) to be updated immediately. The default value is TRUE in which case all of the changes to the analytic workspace that are needed to add the cube dimension member happen now. Specify FALSE only when, for performance reasons, you want to make a bulk set of changes before issuing a compile. In this case, you need to explicitly compile the cube dimension before the values of the analytic workspace objects take effect as described in "Explicitly Compiling a Cube Dimension".

Note:

Regardless of the value that you specify for this argument, the new member is always immediately added to the dimension -- even when an error is signaled during compilation.

merge

A Boolean expression that specifies whether or not the program updates the dimension member if it exists or creates it if it does not. The default value is FALSE.

Usage Notes

Explicitly Compiling a Cube Dimension

When you specify FALSE for auto_compile, you need to explicitly compile the cube dimension before the values of the analytic workspace objects take effect. You perform the compilation with a DBMS_CUBE.BUILD package call. You can make this call within Analytic Workspace Manager by issuing the following statement where cube_dimension_name is the fully-qualified name of the cube dimension as defined in the Oracle data dictionary.

SQL PROCEDURE DBMS_CUBE.BUILD('cube_dimension_name USING (COMPILE)');

By default, issuing the above statement performs an UPDATE and COMMIT to the database. To prevent an UPDATE and COMMIT from occurring, add NO COMMIT to the statement as shown below.

SQL PROCEDURE DBMS_CUBE.BUILD'NO COMMIT cube_dimension_name USING (COMPILE)');

Guidelines for Specifying Values for the Names of Logical OLAP Objects

In an OLAP DML statement the text expression that you specify for an OLAP logical object (that is, a first-class OLAP object that is defined in the Oracle data dictionary such as a cube or cube dimension) must resolve to a value with the following form where LOGICAL_OBJECT_NAME is the Oracle data dictionary name of the OLAP object:

[SCHEMA_NAME.] LOGICAL_OBJECT_NAME

For example, valid expressions for referencing the XADEMO cube dimension in the XADEMO schema include:

'product'
'xademo.product'
'PRODUCT'
'XADEMO.product'
'\"XADEMO\".\"PRODUCT\"'

Note:

OLAP DML cube-aware programs interpret a text value that you specify for an OLAP logical object as upper case text unless you enclose the value in double quotes.

Transaction Scope of Cube-Aware OLAP DML Statements

Unless otherwise noted, the scope of a cube-aware OLAP DML statement, just like other OLAP DML statement, is a single session. To persist any changes, you must have attached the analytic workspace in Read/Write mode before you issue the statement and issue OLAP DML UPDATE and COMMIT statements after you execute the statement. If the analytic workspace is attached Read Only or if you do not issue UPDATE and COMMIT statements, then the changes exist only in the session while the analytic workspace is attached.

Invalid Level Names in Cube-Aware OLAP DML Statements

If you specify an invalid value for level_name or parent_member_id, a compile-time error is thrown. Also, an error will occur if you specify a hierarchy level for the member that is different from the level it participates in another hierarchy. In this case, a call error is thrown if auto_compile is FALSE.

Examples

Example 9-5 Adding Members to an OLAP Cube Dimension

This example adds members to an OLAP cube dimension named my_time.

Execute the following PL/SQL statement to report on the values and hierarchy of the my_time cube dimension before any changes are made.

select dim_key||'  '||level_name||'  '||parent
         from my_time_lvl_hier_view
         order by dim_key asc;

DIM_KEY||''||LEVEL_NAME||''||PARENT
-------------------------------------------------------------------------------
L1_0  L1
L1_1  L1
L2_1  L2  L1_1
L2_2  L2  L1_1
L3_1  L3  L2_1
L3_2  L3  L2_1
L3_3  L3  L2_2
L3_4  L3  L2_2
L3_5  L3  L2_2
 
9 rows selected.

Execute the following PL/SQL statement to execute the user-written OLAP DML program named ADD_LQ_2.

exec dbms_aw.execute('call my_util_aw!add_l1_2');

The definition of the user-written OLAP DML program named ADD_LQ_2 is shown below. Note that it calls the ADD_DIMENSION_MEMBER program provided with the OLAP DML to add new members to the my_time cube dimension.

DEFINE ADD_L1_2 PROGRAM
PROGRAM
  VARIABLE _aw_dim       text
  VARIABLE _aw_sales     text
  VARIABLE _members      text
  VARIABLE _member       text
  VARIABLE _i            integer

  _aw_dim = OBJORG(DIM 'my_time')
  _aw_sales = OBJORG(MEASURE 'my_cube' 'sales')

  " Adds L1_2, L2_3, L3_6  CALL ADD_DIMENSION_MEMBER('L1_2', 'my_time', NA, 'L1', NA, NO)
  CALL ADD_DIMENSION_MEMBER('L2_3', 'my_time', NA, 'L2', 'L1_2', NO)
  CALL ADD_DIMENSION_MEMBER('L3_6', 'my_time', NA, 'L3', 'L2_3', NO)

  " Set my_time attribute (to meaningless values) so dimension can compile
  LIMIT &_aw_dim TO 'L1_2', 'L2_3', 'L3_6'
  _members = VALUES(&_aw_dim)
  _i = 1
  WHILE _i LE NUMLINES(_members)
  DO
    _member = EXTLINES(_members, _i, 1)
    _i = _i + 1
    CALL UPDATE_ATTRIBUTE_VALUE(_member, 'my_time', 'start_date', -
                                to_date('01/01/08', 'MM/DD/YY'), NO)
    CALL UPDATE_ATTRIBUTE_VALUE(_member, 'my_time', 'timespan', 1, NO)
  DOEND

  &_aw_sales(&_aw_dim 'L3_6') = 3

  UPDATE
  COMMIT
END

Issue the following PL/SQL statement to compile the my_time cube dimension.
```
 exec dbms_cube.build('MY_TIME USING (COMPILE)');
```

Report the values and hierarchy of the my_time cube dimension after compilation

select dim_key||'  '||level_name||'  '||parent
    from my_time_lvl_hier_view
    order by dim_key asc;

DIM_KEY||''||LEVEL_NAME||''||PARENT
-------------------------------------------------------------------------------
L1_0  L1
L1_1  L1
L1_2  L1
L2_1  L2  L1_1
L2_2  L2  L1_1
L2_3  L2  L1_2
L3_1  L3  L2_1
L3_2  L3  L2_1
L3_3  L3  L2_2
L3_4  L3  L2_2
L3_5  L3  L2_2
L3_6  L3  L2_3

12 rows selected.

Execute the following PL/SQL statement to solve my_cube with the new hierarchy.

exec dbms_cube.build(script => 'MY_CUBE USING (SOLVE)', add_dimensions => false);

Issue the following PL/SQL statement to report on the values of the sales and moving_sales measure in my-cube. Note that the new my_time cube dimension values are shown.

select my_time||'  '||lpad(sales, 2)||'  '||lpad(moving_sales, 2)
from my_cube_view
order by my_time asc;

MY_TIME||''||LPAD(SALES,2)||''||LPAD(MOVING_SALES,2)
--------------------------------------------------------------------
L1_0  24  27
L1_1  14  38
L1_2   3   3
L2_1   2   5
L2_2  12  14
L2_3   3   3
L3_1   1   4
L3_2   1   2
L3_3  10  11
L3_4   1  11
L3_5   1   2
L3_6   3   3
 
12 rows selected.