Database monitor view 3030 - Materialized query tables

Create View QQQ3030 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, 
          QQ1000 as Materialized_Query_Tables,   
          QQC301 as MQT_Reason_Codes 
   FROM   UserLib/DBMONTable
   WHERE  QQRID=3030)

Table 1. QQQ3030 - Materialized query tables
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
Materialized_Query_Tables	QQ1000	Materialized query tables examined and reason why used or not used: 0 - The materialized query table was used 1 - The cost to use the materialized query table, as determined by the optimizer, was higher than the cost associated with the chosen implementation. 2 - The join specified in the materialized query was not compatible with the query. 3 - The materialized query table had predicates that were not matched in the query. 4 - The grouping specified in the materialized query table is not compatible with the grouping specified in the query.
Materialized_Query_Tables (continued)		5 - The query specified columns that were not in the select-list of the materialized query table. 6 - The materialized query table query contains functionality that is not supported by the query optimizer. 7 - The materialized query table specified the DISABLE QUERY OPTIMIZATION clause. 8 - The ordering specified in the materialized query table is not compatible with the ordering specified in the query. 9 - The query contains functionality that is not supported by the materialized query table matching algorithm. 10 - Materialized query tables may not be used for this query. 11 - The refresh age of this materialized query table exceeds the duration specified by the MATERIALIZED_QUERY_TABLE_REFRESH_AGE QAQQINI option. 12 - The commit level of the materialized query table is lower than the commit level specified for the query. 13 - The distinct specified in the materialized query table is not compatible with the distinct specified in the query. 14 - The FETCH FOR FIRST n ROWS clause of the materialized query table is not compatible with the query. 15 - The QAQQINI options used to create the materialized query table are not compatible with the QAQQINI options used to run this query. 16 - The materialized query table is not usable. 17 - The union specified in the materialized query table is not compatible with the query. 18 - The constants specified in the materialized query table are not compatible with host variable values specified in the query.
MQT_Reason_Codes	QQC301	List of unique reason codes used by the materialized query tables (each materialized query table has a corresponding reason code associated with it)
QVRCNT	QVRCNT	Unique refresh counter