221 lines
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HTML
221 lines
13 KiB
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<title>Database monitor view 3031 - Recursive common table expressions</title>
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<body id="t3030"><a name="t3030"><!-- --></a>
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<img src="./delta.gif" alt="Start of change" /><!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Database monitor view 3031 - Recursive common table expressions</h1>
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<div><pre><strong>Create View</strong> QQQ3031 as
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(<strong>SELECT</strong> QQRID as Row_ID,
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QQTIME as Time_Created,
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QQJFLD as Join_Column,
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QQRDBN as Relational_Database_Name,
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QQSYS as System_Name,
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QQJOB as Job_Name,
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QQUSER as Job_User,
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QQJNUM as Job_Number,
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QQI9 as Thread_ID,
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QQUCNT as Unique_Count,
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QQUDEF as User_Defined,
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QQQDTN as Unique_SubSelect_Number,
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QQQDTL as SubSelect_Nested_Level,
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QQMATN as Materialized_View_Subselect_Number,
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QQMATL as Materialized_View_Nested_Level,
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QVP15E as Materialized_View_Union_Level,
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QVP15A as Decomposed_Subselect_Number,
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QVP15B as Total_Number_Decomposed_SubSelects,
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QVP15C as Decomposed_SubSelect_Reason_Code,
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QVP15D as Starting_Decomposed_SubSelect,
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QVRCNT as Unique_Refresh_Counter,
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QVPARPF as Parallel_Prefetch,
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QVPARPL as Parallel_PreLoad,
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QVPARD as Parallel_Degree_Requested,
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QVPARU as Parallel_Degree_Used,
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QVPARRC as Parallel_Degree_Reason_Code,
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QQEPT as Estimated_Processing_Time,
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QVCTIM as Estimated_Cumulative_Time,
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QQREST as Estimated_Rows_Selected,
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QQC11 as Recursive_Query_Cycle_Check,
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QQC15 as Recursive_Query_Search_Option,
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QQI2 as Number_of_Recursive_Values
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<strong>FROM</strong> UserLib/DBMONTable
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<strong>WHERE</strong> QQRID=3031) </pre>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="rows"><caption>Table 1. QQQ3031 - Recursive common table
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expressions</caption><thead align="left"><tr><th align="left" valign="bottom" width="34.659090909090914%" id="d0e41">View Column Name</th>
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<th align="left" valign="bottom" width="15.909090909090908%" id="d0e43">Table Column Name</th>
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<th align="left" valign="bottom" width="49.43181818181818%" id="d0e45">Description</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Row_ID </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQRID</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Row identification</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Time_Created </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQTIME</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Time row was created </td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Join_Column </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQJFLD</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Join column (unique per job)</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Relational_Database_Name </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQRDBN</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Relational database name </td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">System_Name </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQSYS</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">System name</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Job_Name </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQJOB</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Job name</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Job_User </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQUSER</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Job User</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Job_Number </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQJNUM</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Job Number</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Thread_ID </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQI9</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Thread identifier</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Unique_Count </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQUCNT</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Unique count (unique per query)</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">User_Defined </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQUDEF</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">User defined column</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Unique_SubSelect_Number </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQQDTN</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Unique subselect number</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">SubSelect_Nested_Level </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQQDTL</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Subselect nested level</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Materialized_View_Subselect_Number </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQMATN</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Materialized view subselect number</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Materialized_View_Nested_Level </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQMATL</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Materialized view nested level</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Materialized_View_Union_Level </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVP15E</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Materialized view union level</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Decomposed_Subselect_Number </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVP15A</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Decomposed query subselect number, unique across all
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decomposed subselects</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Total_Number_Decomposed_SubSelects </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVP15B</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Total number of decomposed subselects</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Decomposed_SubSelect_Reason_Code </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVP15C</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Decomposed query subselect reason code</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Starting_Decomposed_SubSelect </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVP15D</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Decomposed query subselect number for the first decomposed
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subselect</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Unique_Refresh_Counter </td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVRCNT</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Unique refresh counter</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Parallel_Prefetch</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVPARPF</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Parallel Prefetch (Y/N)</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Parallel_PreLoad</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVPARPL</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Parallel Preload (Y/N)</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Parallel_Degree_Requested</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVPARD</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Parallel degree requested</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Parallel_Degree_Used</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVPARU</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Parallel degree used </td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Parallel_Degree_Reason_Code</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVPARRC</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Reason parallel processing was limited</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Estimated_Processing_Time</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQEPT</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Estimated processing time, in seconds</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Estimated_Cumulative_Time</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QVCTIM</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Estimated cumulative time, in seconds</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Estimated_Rows_Selected</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQREST</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Estimated number of rows selected</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Recursive_Query_Cycle_Check</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQC11</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">CYCLE option: <ul><li>Y - checking for cyclic data</li>
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<li>N - not checking for cyclic data</li>
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</ul>
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</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Recursive_Query_Search_Option</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQC15</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">SEARCH option: <ul><li>N - None specified</li>
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<li>D - Depth first</li>
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<li>B - Breadth first</li>
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</ul>
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</td>
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</tr>
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<tr><td valign="top" width="34.659090909090914%" headers="d0e41 ">Number_of_Recursive_Values</td>
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<td valign="top" width="15.909090909090908%" headers="d0e43 ">QQI2</td>
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<td valign="top" width="49.43181818181818%" headers="d0e45 ">Number of values put on queue to implement recursion.
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Includes values necessary for CYCLE and SEARCH options. </td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="lofdds.htm" title="The following examples show the different optional SQL view format that you can create with the SQL shown. The column descriptions are explained in the tables following each example. These views are not shipped with the server, and you must create them, if you choose to do so. These views are optional and are not required for analyzing monitor data.">Optional database monitor SQL view format</a></div>
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</div>
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</div>
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<img src="./deltaend.gif" alt="End of change" /></body>
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</html>
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