Database monitor view 3023 - Temp Hash Table Created

 

Create View QQQ3023 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, 
          QVC1F as HashTable_ReasonCode, 
          QQI2 as HashTable_Entries, 
          QQI3 as HashTable_Size,  
          QQI4 as HashTable_Row_Size, 
          QQI5 as HashTable_Key_Size,  
          QQIA as HashTable_Element_Size,  
          QQI7 as HashTable_PoolSize, 
          QQI8 as HashTable_PoolID,  
          QVC101 as HashTable_Name,  
          QVC102 as HashTable_Library,  
          QVC3001 as HashTable_Columns    FROM   UserLib/DBMONTable    WHERE  QQRID=3023)

Table 1. QQQ3023 - Temp Hash Table Created
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

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
HashTable_ReasonCode QVC1F Hash table reason code

  • J - Created for hash join

  • G - Created for hash grouping
HashTable_Entries QQI2 Hash table entries
HashTable_Size QQI3 Hash table size
HashTable_Row_Size QQI4 Hash table row size
HashTable_Key_Size QQI5 Hash table key size
HashTable_Element_Size QQIA Hash table element size
HashTable_PoolSize QQI7 Hash table pool size
HashTable_PoolID QQI8 Hash table pool ID
HashTable_Name QVC101 Hash table internal name
HashTable_Library QVC102 Hash table library
HashTable_Columns QVC3001 Columns used to create hash table

 

Parent topic:

Optional database monitor SQL view format