A FILTER function is used instead of modifying the filter context

The FILTER function is used instead of modifying the filter context.

Remarks

The FILTER function can be expensive from a materialization standpoint. When the filter condition only references physical columns of the iterated table, then it is possible to filter the table through the filter context by using CALCULATETABLE.

Example

Move the predicate in a CALCULATETABLE filter using ALLSELECTED as a filter modifier. Use CALCULATETABLE instead of FILTER to filter the table moving the condition into a filter argument. Remove ALLSELECTED from the first argument and apply it as a filted modifier to preserve the same semantics.

Original code

FILTER (
    ALLSELECTED ( Sales ),
    Sales[Order Date] <= MAX( Sales[Order Date] )
)

Possible optimization

CALCULATETABLE (
    Sales,
    Sales[Order Date] <= MAX( Sales[Order Date] ),
    ALLSELECTED ( Sales )
)