169 lines
11 KiB
HTML
169 lines
11 KiB
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<meta name="DC.Title" content="Query optimization performance information messages" />
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<meta name="abstract" content="You can evaluate the structure and performance of the given SQL statements in a program using informational messages put in the job log by the database manager." />
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<meta name="description" content="You can evaluate the structure and performance of the given SQL statements in a program using informational messages put in the job log by the database manager." />
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<meta name="DC.subject" content="performance, information messages, message, performance information" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Query optimization performance information messages</title>
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</head>
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<body id="pimes"><a name="pimes"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Query optimization performance information messages</h1>
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<div><p>You can evaluate the structure and performance of the given SQL
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statements in a program using informational messages put in the job log by
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the database manager. </p>
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<p>The messages are issued for an SQL program or interactive SQL when running
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in the debug mode. The database manager may send any of the following messages
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when appropriate. The ampersand variables (&1, &X) are replacement
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variables that contain either an object name or some other substitution value
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when the message appears in the job log. These messages provide
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feedback on how a query was run and, in some cases, indicate the improvements
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that can be made to help the query run faster.</p>
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<p>The messages contain message help that provides information about the cause
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for the message, object name references, and possible user responses.</p>
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<p>The time at which the message is sent does not necessarily indicate when
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the associated function was performed. Some messages are sent altogether at
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the start of a query run.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="cpi4321.htm">CPI4321 - Access path built for &18 &19</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4322.htm">CPI4322 - Access path built from keyed file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4323.htm">CPI4323 - The query access plan has been rebuilt</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4324.htm">CPI4324 - Temporary file built for file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4325.htm">CPI4325 - Temporary result file built for query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4326.htm">CPI4326 - &12 &13 processed in join position &10</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4327.htm">CPI4327 - File &12 &13 processed in join position &10</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4328.htm">CPI4328 - Access path of file &3 was used by query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4329.htm">CPI4329 - Arrival sequence access was used for &12 &13</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi432a.htm">CPI432A - Query optimizer timed out for file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi432b.htm">CPI432B - Subselects processed as join query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi432c.htm">CPI432C - All access paths were considered for file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi432d.htm">CPI432D - Additional access path reason codes were used</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi432f.htm">CPI432F - Access path suggestion for file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4330.htm">CPI4330 - &6 tasks used for parallel &10 scan of file &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4331.htm">CPI4331 - &6 tasks used for parallel index created over file</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4332.htm">CPI4332 - &1 host variables used in query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4333.htm">CPI4333 - Hashing algorithm used to process join</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4334.htm">CPI4334 - Query implemented as reusable ODP</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4335.htm">CPI4335 - Optimizer debug messages for hash join step &1 follow</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4336.htm">CPI4336 - Group processing generated</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4337.htm">CPI4337 - Temporary hash table build for hash join step &1</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4338.htm">CPI4338 - &1 Access path(s) used for bitmap processing of file &2</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi433d.htm">CPI433D - Query options used to build the i5/OS query access plan</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi433f.htm">CPI433F - Multiple join classes used to process join</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4340.htm">CPI4340 - Optimizer debug messages for join class step &1 follow</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4341.htm">CPI4341 - Performing distributed query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4342.htm">CPI4342 - Performing distributed join for query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4343.htm">CPI4343 - Optimizer debug messages for distributed query step &1 of &2 follow:</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4345.htm">CPI4345 - Temporary distributed result file &3 built for query</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4346.htm">CPI4346 - Optimizer debug messages for query join step &1 of &2 follow:</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4347.htm">CPI4347 - Query being processed in multiple steps</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4348.htm">CPI4348 - The ODP associated with the cursor was hard closed</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4349.htm">CPI4349 - Fast past refresh of the host variables values is not possible</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi434c.htm">CPI434C - The query access plan was not rebuilt</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4350.htm">CPI4350 - Materialized query tables were considered for optimization</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="cpi4351.htm">CPI4351 - Additional reason codes for query access plan has been rebuilt.</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajqmsgref.htm" title="See the following for query optimizer message reference:">Query optimizer messages reference</a></div>
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</div>
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</div>
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</body>
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</html>
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