Performance issue on Query Object when using Outer Join with more than one Child Table

Problem:
Sub-optimal
SQL (multiple SQL statements) generated when a query object has more than one child table in the data
sources nested directly under the parent table.

Resolution:
Change
the default "fetch mode" from ā€œ1:nā€ to ā€œ1:1ā€ while linking the child
data sources to the parents.