Fact LTS behaviour

Question

Hi
Would like to check if the behaviour that I encountered in Fact LTS is normal.
E.g. Fact A has 1 LTS AB
in LTS AB, there are 2 physical table sources: Table 12 and Table 23
I have 2 measures in Fact A:
1. Measure A, is mapped directly to Table 12
2. Weighted Measure A, is mapped to Table 12 and Table 23 (basically, Table 23 stores weight factor, so this weighted measure is essentially Measure A * weight factor)
Now when I pulll in Measure A only, the SQL generated will bring in Table 23 in the join even though I did not pull in Weighted Measure A.
But for Dimension LTS, the behaviour is different, it will only join to the table only when necessary.
e.g. I have 1 Dimension LTS that joins Product table with Country table and Region table.
So I choose Product ID and Country ID, it'll only join Product and Country tables.
Only when I choose Product ID, Country ID, Region ID, then it'll bring all 3 tables together.
Please advice if this is a known behaviour for Fact LTS
Many thanks

Answer 1

Hi bifacts
Just to clarify, the LTS for the dimension have 3 physical table sources:
1. Product table
2. Country table (joined to Product table)
3. Region table (joined to Product table)
Product ID is mapped to (1),
Country ID is mapped to (2),
Region ID mapped to (3),
So when I select only Product ID, it'll only reference (1),
if I select Product ID and Country ID, only tables (1) and (2) will be referenced in the SQL
Now for the Fact LTS, it has 2 physical table sources:
1. Table 12
2. Table 23 (joined to Table 12)
Measure A is mapped to (1),
Weighted Measure A is based on an expression formula, so it's not really mapped to both table, it's a multiplication of columns from Table 12 and Table 23
Now when I only select Measure A, the SQL generated will reference Table 12 and Table 23. But if we're to follow the behaviour in Dimension LTS, it should only bring in the necessary table, which is Table 12, there's no need to bring in Table 23 in the SQL.
Is the behaviour correct ?