Architecture of Query Execution—Retrieving Data from Storage - Microsoft SQL Server 2008 Analysis Services - page 557

Query
Measure Group
Job

Query Range
Group 1 Job

Query Range
Group 2 Job

Query
Partition 1 from
Group 1 Job

Query
Partition 2 from
Group 1 Job

Query
Partition N from
Group 1 Job

Query
Partition 1 from
Group 1 Job

Query
Partition 2 from
Group 1 Job

Segment 1
Job

Segment 1
Job

Segment 1
Job

Segment 1
Job

Segment 1
Job

Read Data Read Data Read Data Read Data Read Data

Decode Data Decode Data Decode Data Decode Data Decode Data

Filter Data Filter Data Filter Data Filter Data Filter Data

Segment 2
Job

Segment 2
Job

Segment 2
Job

Segment 2
Job

Segment 2
Job

Read Data Read Data Read Data Read Data Read Data

Decode Data Decode Data Decode Data Decode Data Decode Data

Filter Data Filter Data Filter Data Filter Data Filter Data

… … … … …

Segment N
Job

Segment N
Job

Segment N
Job

Segment N
Job

Segment N
Job

Read Data Read Data Read Data Read Data Read Data

Decode Data Decode Data Decode Data Decode Data Decode Data

Filter Data Filter Data Filter Data Filter Data Filter Data

Aggregate
Bookmark Data

Aggregate
Bookmark Data

Aggregate
Data

FIGURE 30.3 The scheme Analysis Services uses to query partitions of a measure group that
has a DISTINCT_COUNT measure.