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 |