Database monitor view 3022 - Bitmap Merge

 

Create View QQQ3022 as 
  (SELECT QQRID as Row_ID, 
          QQTIME as Time_Created, 
          QQJFLD as Join_Column, 
          QQRDBN as Relational_Database_Name, 
          QQSYS as System_Name, 
          QQJOB as Job_Name, 
          QQUSER as Job_User, 
          QQJNUM as Job_Number, 
          QQI9 as Thread_ID, 
          QQUCNT as Unique_Count, 
          QQUDEF as User_Defined,  
          QQQDTN as Unique_SubSelect_Number, 
          QQQDTL as SubSelect_Nested_Level, 
          QQMATN as Materialized_View_Subselect_Number, 
          QQMATL as Materialized_View_Nested_Level, 
          QVP15E as Materialized_View_Union_Level, 
          QVP15A as Decomposed_Subselect_Number, 
          QVP15B as Total_Number_Decomposed_SubSelects, 
          QVP15C as Decomposed_SubSelect_Reason_Code,
          QVP15D as Starting_Decomposed_SubSelect,
          QVRCNT as Unique_Refresh_Counter, 
          QVPARPF as Parallel_Prefetch, 
          QVPARPL as Parallel_PreLoad, 
          QVPARD as Parallel_Degree_Requested, 
          QVPARU as Parallel_Degree_Used, 
          QVPARRC as Parallel_Degree_Reason_Code, 
          QQEPT as Estimated_Processing_Time, 
          QVCTIM as Estimated_Cumulative_Time, 
          QQREST as Estimated_Rows_Selected, 
          QQAJN as Estimated_Join_Rows, 
          QQJNP as Join_Position, 
          QQI6 as DataSpace_Number,
          QQC21 as Join_Method, 
          QQC22 as Join_Type,
          QQC23 as Join_Operator,
          QVJFANO as Join_Fanout,  
          QVFILES as Join_Table_Count, 
          QQI2 as Bitmap_Size, 
          QVC101 as Bitmap_ID,   
          QVC3001 as Bitmaps_Merged 
   FROM   UserLib/DBMONTable    WHERE  QQRID=3022)

Table 1. QQQ3022 - Bitmap Merge

View Column Name	Table Column Name	Description
Row_ID	QQRID	Row identification
Time_Created	QQTIME	Time row was created
Join_Column	QQJFLD	Join column (unique per job)
Relational_Database_Name	QQRDBN	Relational database name
System_Name	QQSYS	System name
Job_Name	QQJOB	Job name
Job_User	QQUSER	Job user
Job_Number	QQJNUM	Job number
Thread_ID	QQI9	Thread identifier
Unique_Count	QQUCNT	Unique count (unique per query)
User_Defined	QQUDEF	User defined column
Unique_SubSelect_Number	QQQDTN	Unique subselect number
SubSelect_Nested_Level	QQQDTL	Subselect nested level
Materialized_View_Subselect_Number	QQMATN	Materialized view subselect number
Materialized_View_Nested_Level	QQMATL	Materialized view nested level
Materialized_View_Union_Level	QVP15E	Materialized view union level
Decomposed_Subselect_Number	QVP15A	Decomposed query subselect number, unique across all decomposed subselects
Total_Number_Decomposed_SubSelects	QVP15B	Total number of decomposed subselects
Decomposed_SubSelect_Reason_Code	QVP15C	Decomposed query subselect reason code
Starting_Decomposed_SubSelect	QVP15D	Decomposed query subselect number for the first decomposed subselect
Unique_Refresh_Counter	QVRCNT	Unique refresh counter
Parallel_Prefetch	QVPARPF	Parallel Prefetch (Y/N)
Parallel_PreLoad	QVPARPL	Parallel Preload (index used)
Parallel_Degree_Requested	QVPARD	Parallel degree requested (index used)
Parallel_Degree_Used	QVPARU	Parallel degree used (index used)
Parallel_Degree_Reason_Code	QVPARRC	Reason parallel processing was limited (index used)
Estimated_Processing_Time	QQEPT	Estimated processing time, in seconds
Estimated_Cumulative_Time	QVCTIM	Estimated cumulative time, in seconds
Estimated_Rows_Selected	QQREST	Estimated rows selected
Estimated_Join_Rows	QQAJN	Estimated number of joined rows
Join_Position	QQJNP	Join position - when available
DataSpace_Number	QQI6	Dataspace number
Join_Method	QQC21	Join method - when available NL - Nested loop MF - Nested loop with selection HJ - Hash join
Join_Type	QQC22	Join type - when available IN - Inner join PO - Left partial outer join EX - Exception join
Join_Operator	QQC23	Join operator - when available EQ - Equal NE - Not equal GT - Greater than GE - Greater than or equal LT - Less than LE - Less than or equal CP - Cartesian product
Join_Fanout	QVJFANO	Join fan out. Possible values are: N - Normal join situation where fanout is allowed and each matching row of the join fanout is returned. D - Distinct fanout. Join fanout is allowed however none of the join fanout rows are returned. U - Unique fanout. Join fanout is not allowed. Error situation if join fanout occurs.
Join_Table_Count	QVFILES	Number of tables joined
Bitmap_Size	QQI2	Bitmap size
Bitmap_ID	QVC101	Internal bitmap ID
Bitmaps_Merged	QVC3001	IDs of bitmaps merged together

 

Parent topic:

Optional database monitor SQL view format