Database monitor view 3003

Database monitor view 3003 - Query Sort
Create View QQQ3003 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,
          QQSTIM as Start_Timestamp, 
          QQETIM as End_Timestamp, 
          QQRSS as Sorted_Rows, 
          QQI1 as Sort_Space_Size,
          QQI2 as Pool_Size, 
          QQI3 as Pool_Id, 
          QQI4 as Internal_Sort_Buffer_Length, 
          QQI5 as External_Sort_Buffer_Length, 
          QQRCOD as Reason_Code, 
          QQI7 as Union_Reason_Subcode, 
          QVBNDY as Bound, 
          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, 
          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    FROM   UserLib/DBMONTable    WHERE  QQRID=3003) 
Table 1. QQQ3003 - Query Sort
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
Start_Timestamp QQSTIM Start timestamp, when available
End_Timestamp QQETIM End timestamp, when available
Sorted_Rows QQRSS Estimated number of rows selected or sorted.
Sort_Space_Size QQI1 Estimated size of sort space.
Pool_Size QQI2 Pool size
Pool_Id QQI3 Pool id
Internal_Sort_Buffer_Length QQI4 Internal sort buffer length
External_Sort_Buffer_Length QQI5 External sort buffer length
Reason_Code QQRCOD Reason code

F1 - Query contains grouping columns (GROUP BY) from more that one table, or contains grouping columns from a secondary table of a join query that cannot be reordered.

F2 - Query contains ordering columns (ORDER BY) from more that one table, or contains ordering columns from a secondary table of a join query that cannot be reordered.

F3 - The grouping and ordering columns are not compatible.

F4 - DISTINCT was specified for the query.

F5 - UNION was specified for the query.

F6 - Query had to be implemented using a sort. Key length of more than 2000 bytes or more than 120 key columns specified for ordering.

Reason_Code (continued)

F7 - Query optimizer chose to use a sort rather than an index to order the results of the query.

F8 - Perform specified row selection to minimize I/O wait time.

FC - The query contains grouping fields and there is a read trigger on at least one of the physical files in the query.

Union_Reason_Subcode QQI7 Reason subcode for Union:

51 - Query contains UNION and ORDER BY

52 - Query contains UNION ALL

Bound QVBNDY I/O or CPU bound. Possible values are:

I - I/O bound

C - CPU bound

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_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

Parent topic:
Optional database monitor SQL view format

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
Start_Timestamp	QQSTIM	Start timestamp, when available
End_Timestamp	QQETIM	End timestamp, when available
Sorted_Rows	QQRSS	Estimated number of rows selected or sorted.
Sort_Space_Size	QQI1	Estimated size of sort space.
Pool_Size	QQI2	Pool size
Pool_Id	QQI3	Pool id
Internal_Sort_Buffer_Length	QQI4	Internal sort buffer length
External_Sort_Buffer_Length	QQI5	External sort buffer length
Reason_Code	QQRCOD	Reason code F1 - Query contains grouping columns (GROUP BY) from more that one table, or contains grouping columns from a secondary table of a join query that cannot be reordered. F2 - Query contains ordering columns (ORDER BY) from more that one table, or contains ordering columns from a secondary table of a join query that cannot be reordered. F3 - The grouping and ordering columns are not compatible. F4 - DISTINCT was specified for the query. F5 - UNION was specified for the query. F6 - Query had to be implemented using a sort. Key length of more than 2000 bytes or more than 120 key columns specified for ordering.
Reason_Code (continued)		F7 - Query optimizer chose to use a sort rather than an index to order the results of the query. F8 - Perform specified row selection to minimize I/O wait time. FC - The query contains grouping fields and there is a read trigger on at least one of the physical files in the query.
Union_Reason_Subcode	QQI7	Reason subcode for Union: 51 - Query contains UNION and ORDER BY 52 - Query contains UNION ALL
Bound	QVBNDY	I/O or CPU bound. Possible values are: I - I/O bound C - CPU bound
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_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