Selecting structure fields from search box in expressions and rules.

Question

Hi,
  I've a case where there are more than one structure object (structures bound to DDIC structure) with same field (lets say MATNR for example). Now assume that I've 5 structures with the field MATNR (struct_1, struct_2,... struct_5). I've to use the field struct_3-MATNR in one of the expressions are result object. So I click on the context menu button of the result link and click on Select... menu option. In the pop up search screen I type MATNR and it shows me 5 result records. Now the problem is how do I know which MATNR belongs to struct_3. The search results doesn't show to which structure &/OR table a field belongs to.
I've been randomly selecting each one till I get the right one which wastes a lot of time.

Answer 1

I'll try to put my case with a more detailed explanation.
Hierarchy:
Function_01->Ruleset_01->Ruleset_exp_01(DB_LOOKUP)
In the above DB_LOOKUP I try to fetch records from database based on VBELN.
I've a structure Struct_01 in the Function_01 context with the element VBELN in it(Struct_01).
My select query goes like this.
Select Col1 Col2 Col3 from XYZ_TABLE WHERE VBELN = Struct_01-VBELN.
I've to select Struct_01-VBELN for the above case, but I don't find Struct_01 though it is in the function context.
Note: I've around 5 structures with VBELN