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| <div class="subTitle">org.trafodion.sql.udr</div> |
| <h2 title="Class UDRPlanInfo" class="title">Class UDRPlanInfo</h2> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/trafodion/sql/udr/TMUDRSerializableObject.html" title="class in org.trafodion.sql.udr">org.trafodion.sql.udr.TMUDRSerializableObject</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.trafodion.sql.udr.UDRPlanInfo</li> |
| </ul> |
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| <pre>public class <span class="strong">UDRPlanInfo</span> |
| extends <a href="../../../../org/trafodion/sql/udr/TMUDRSerializableObject.html" title="class in org.trafodion.sql.udr">TMUDRSerializableObject</a></pre> |
| <div class="block">Describes the query plan used for a UDR invocation |
| |
| <p>Objects of this type are used together with UDRInvocationInfo |
| objects and in the future they may contain additional info on |
| plan-related such as the chosen partitioning and ordering.</div> |
| </li> |
| </ul> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.SpecialDegreeOfParallelism.html" title="enum in org.trafodion.sql.udr">UDRPlanInfo.SpecialDegreeOfParallelism</a></strong></code> |
| <div class="block">Special degrees of parallelism.</div> |
| </td> |
| </tr> |
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| <h3>Method Summary</h3> |
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| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#addPlanData(byte[])">addPlanData</a></strong>(byte[] planData)</code> |
| <div class="block">Attach a byte array to the plan to be sent to the runtime instances.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getCostPerRow()">getCostPerRow</a></strong>()</code> |
| <div class="block">Retreive cost per row</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getDesiredDegreeOfParallelism()">getDesiredDegreeOfParallelism</a></strong>()</code> |
| <div class="block">Return the desired degree of parallelism for this plan.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>byte[]</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getPlanData()">getPlanData</a></strong>()</code> |
| <div class="block">Retrieve plan data attached to the UDR invocation and plan.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/trafodion/sql/udr/UDRWriterCompileTimeData.html" title="class in org.trafodion.sql.udr">UDRWriterCompileTimeData</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getUDRWriterCompileTimeData()">getUDRWriterCompileTimeData</a></strong>()</code> |
| <div class="block">Get data to persist between calls of the optimizer interface</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#print()">print</a></strong>()</code> |
| <div class="block">Print the object, for use in debugging.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#setCostPerRow(long)">setCostPerRow</a></strong>(long microseconds)</code> |
| <div class="block">Estimate of average time taken to produce an output row, in microseconds</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#setDesiredDegreeOfParallelism(int)">setDesiredDegreeOfParallelism</a></strong>(int dop)</code> |
| <div class="block">Set the desired degree of parallelism.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#setUDRWriterCompileTimeData(org.trafodion.sql.udr.UDRWriterCompileTimeData)">setUDRWriterCompileTimeData</a></strong>(<a href="../../../../org/trafodion/sql/udr/UDRWriterCompileTimeData.html" title="class in org.trafodion.sql.udr">UDRWriterCompileTimeData</a> compileTimeData)</code> |
| <div class="block">Set data to persist between calls of the optimizer interface</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <h3>Method Detail</h3> |
| <a name="getCostPerRow()"> |
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| </a> |
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| <h4>getCostPerRow</h4> |
| <pre>public long getCostPerRow()</pre> |
| <div class="block">Retreive cost per row</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>costPerRow</dd></dl> |
| </li> |
| </ul> |
| <a name="getDesiredDegreeOfParallelism()"> |
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| </a> |
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| <h4>getDesiredDegreeOfParallelism</h4> |
| <pre>public int getDesiredDegreeOfParallelism()</pre> |
| <div class="block">Return the desired degree of parallelism for this plan.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Degree of parallelism to be used for this plan alternative |
| (positive) or one of the enum values in |
| UDRPlanInfo#SpecialDegreeOfParallelism (zero or negative).</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#setDesiredDegreeOfParallelism(int)"><code>setDesiredDegreeOfParallelism(int)</code></a></dd></dl> |
| </li> |
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| <a name="setDesiredDegreeOfParallelism(int)"> |
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| <h4>setDesiredDegreeOfParallelism</h4> |
| <pre>public void setDesiredDegreeOfParallelism(int dop) |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Set the desired degree of parallelism. |
| |
| <p> Here are some special values that can be set, in |
| addition to positive numbers. These are defined in |
| class UDRPlanInfo. |
| <ul> |
| <li> ANY_DEGREE_OF_PARALLELISM: |
| This will allow the optimizer to choose any degree |
| of parallelism, including 1 (serial execution) |
| <li> DEFAULT_DEGREE_OF_PARALLELISM: |
| Currently the same as ANY_DEGREE_OF_PARALLELISM. |
| The optimizer will use a heuristic based on |
| the estimated cardinality (which you can set in |
| the <a href="../../../../org/trafodion/sql/udr/UDR.html#describeStatistics(org.trafodion.sql.udr.UDRInvocationInfo)"><code>UDR.describeStatistics(org.trafodion.sql.udr.UDRInvocationInfo)</code></a> interface). |
| <li> MAX_DEGREE_OF_PARALLELISM: |
| Choose the highest possible degree of parallelism. |
| <li> ONE_INSTANCE_PER_NODE: |
| Start one parallel instance on every Trafodion node. |
| This is mostly meant for internal TMUDFs, e.g. a |
| TMUDF to read the log files on every node. |
| </ul></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>dop</code> - desired degree of parallelism (a positive number or |
| one of the enum values in |
| UDRPlanInfo#SpecialDegreeOfParallelism).</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getDesiredDegreeOfParallelism()"><code>getDesiredDegreeOfParallelism()</code></a>, |
| <a href="../../../../org/trafodion/sql/udr/UDR.html#describeStatistics(org.trafodion.sql.udr.UDRInvocationInfo)"><code>UDR.describeStatistics(org.trafodion.sql.udr.UDRInvocationInfo)</code></a>, |
| <a href="../../../../org/trafodion/sql/udr/TableInfo.html#setEstimatedNumRows(long)"><code>TableInfo.setEstimatedNumRows(long)</code></a></dd></dl> |
| </li> |
| </ul> |
| <a name="setCostPerRow(long)"> |
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| </a> |
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| <h4>setCostPerRow</h4> |
| <pre>public void setCostPerRow(long microseconds) |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Estimate of average time taken to produce an output row, in microseconds</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></code></dd></dl> |
| </li> |
| </ul> |
| <a name="getUDRWriterCompileTimeData()"> |
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| <h4>getUDRWriterCompileTimeData</h4> |
| <pre>public <a href="../../../../org/trafodion/sql/udr/UDRWriterCompileTimeData.html" title="class in org.trafodion.sql.udr">UDRWriterCompileTimeData</a> getUDRWriterCompileTimeData() |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Get data to persist between calls of the optimizer interface</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>UDR writer-specific data that was previously attached or NULL.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#setUDRWriterCompileTimeData(org.trafodion.sql.udr.UDRWriterCompileTimeData)"><code>setUDRWriterCompileTimeData(UDRWriterCompileTimeData)</code></a></dd></dl> |
| </li> |
| </ul> |
| <a name="setUDRWriterCompileTimeData(org.trafodion.sql.udr.UDRWriterCompileTimeData)"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>setUDRWriterCompileTimeData</h4> |
| <pre>public void setUDRWriterCompileTimeData(<a href="../../../../org/trafodion/sql/udr/UDRWriterCompileTimeData.html" title="class in org.trafodion.sql.udr">UDRWriterCompileTimeData</a> compileTimeData) |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Set data to persist between calls of the optimizer interface |
| |
| <p> This call can be used to attach an object derived from class |
| UDRWriterCompileTimeData to the UDRPlanInfo object. Once |
| attached, the data will be carried between the stages of the |
| optimizer interface and can be used to keep state. Note that |
| this data will be deleted at the end of the optimizer phase and |
| will not persist until runtime. |
| |
| <p> Use this method to keep data that is specific to a query plan |
| alternative, represented by the UDRPlanInfo object. Use |
| UDRInvocationInfo::setUDRWriterCompileTimeData() to keep data |
| that is common for the entire UDR invocation.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>compileTimeData</code> - UDR writer-defined compile-time data to attach.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRInvocationInfo.html#setUDRWriterCompileTimeData(org.trafodion.sql.udr.UDRWriterCompileTimeData)"><code>UDRInvocationInfo.setUDRWriterCompileTimeData(UDRWriterCompileTimeData)</code></a>, |
| <a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getUDRWriterCompileTimeData()"><code>getUDRWriterCompileTimeData()</code></a></dd></dl> |
| </li> |
| </ul> |
| <a name="addPlanData(byte[])"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>addPlanData</h4> |
| <pre>public void addPlanData(byte[] planData) |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Attach a byte array to the plan to be sent to the runtime instances. |
| |
| <p> Compile time and runtime interfaces of the UDR can be called from |
| different processes, since UDRs can be executed in parallel and on |
| different nodes. If the UDR writer would like to carry state from |
| the compiler interface calls to runtime calls, the best way to achieve |
| this to attach it using this call and to retrieve the state at runtime |
| using the UDRPlanInfo#getPlanData() call. |
| |
| <p> The best place to use this method is from within |
| UDRPlanInfo#completeDescription() method, since this method is |
| called on the optimal plan that will be used at runtime. It can |
| also be called from other methods, and the plan data will be |
| discarded if the plan is not chosen.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>planData</code> - A byte array, content defined by the UDR writer, to be |
| sent to all runtime instances executing the UDR. The buffer |
| can and should be deleted by the caller after calling this method.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#getPlanData()"><code>getPlanData()</code></a></dd></dl> |
| </li> |
| </ul> |
| <a name="getPlanData()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getPlanData</h4> |
| <pre>public byte[] getPlanData()</pre> |
| <div class="block">Retrieve plan data attached to the UDR invocation and plan. |
| |
| <p> This method can be called at runtime to get state generated at compile time.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Reference to a byte array with plan data generated by the UDR writer |
| at compile time.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/trafodion/sql/udr/UDRPlanInfo.html#addPlanData(byte[])"><code>addPlanData(byte[])</code></a></dd></dl> |
| </li> |
| </ul> |
| <a name="print()"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>print</h4> |
| <pre>public void print() |
| throws <a href="../../../../org/trafodion/sql/udr/UDRException.html" title="class in org.trafodion.sql.udr">UDRException</a></pre> |
| <div class="block">Print the object, for use in debugging.</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
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