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| <li>Summary: </li> |
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| <div class="subTitle">org.apache.ignite.cache.query</div> |
| <h2 title="Class SqlFieldsQuery" class="title">Class SqlFieldsQuery</h2> |
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| <ul class="inheritance"> |
| <li><a href="http://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/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">org.apache.ignite.cache.query.Query</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><?>></li> |
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| <li>org.apache.ignite.cache.query.SqlFieldsQuery</li> |
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| <pre>public final class <span class="strong">SqlFieldsQuery</span> |
| extends <a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><?>></pre> |
| <div class="block">SQL Fields query. This query can return specific fields of data based |
| on SQL <code>'select'</code> clause, as opposed to <a href="../../../../../org/apache/ignite/cache/query/SqlQuery.html" title="class in org.apache.ignite.cache.query"><code>SqlQuery</code></a>, which always returns |
| the whole key and value objects back. |
| <h1 class="header">Collocated Flag</h1> |
| Collocation flag is used for optimization purposes. Whenever Ignite executes |
| a distributed query, it sends sub-queries to individual cluster members. |
| If you know in advance that the elements of your query selection are collocated |
| together on the same node, usually based on some <b>affinity-key</b>, Ignite |
| can make significant performance and network optimizations. |
| <p> |
| For example, in case of Word-Count example, we know that all identical words |
| are processed on the same cluster member, because we use the <code>word</code> itself |
| as affinity key. This allows Ignite to execute the <code>'limit'</code> clause on |
| the remote nodes and bring back only the small data set specified within the 'limit' clause, |
| instead of the whole query result as would happen in a non-collocated execution.</div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/ignite/IgniteCache.html#query(org.apache.ignite.cache.query.Query)"><code>IgniteCache.query(Query)</code></a>, |
| <a href="../../../../../serialized-form.html#org.apache.ignite.cache.query.SqlFieldsQuery">Serialized Form</a></dd></dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <li class="blockList"> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| </a> |
| <h3>Field Summary</h3> |
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| <li class="blockList"><a name="fields_inherited_from_class_org.apache.ignite.cache.query.Query"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.ignite.cache.query.<a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a></h3> |
| <code><a href="../../../../../org/apache/ignite/cache/query/Query.html#DFLT_PAGE_SIZE">DFLT_PAGE_SIZE</a></code></li> |
| </ul> |
| </li> |
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| <h3>Constructor Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#SqlFieldsQuery(java.lang.String)">SqlFieldsQuery</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql)</code> |
| <div class="block">Constructs SQL fields query.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#SqlFieldsQuery(java.lang.String,%20boolean)">SqlFieldsQuery</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql, |
| boolean collocated)</code> |
| <div class="block">Constructs SQL fields query.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <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><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#getArgs()">getArgs</a></strong>()</code> |
| <div class="block">Gets SQL arguments.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#getSql()">getSql</a></strong>()</code> |
| <div class="block">Gets SQL clause.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#isCollocated()">isCollocated</a></strong>()</code> |
| <div class="block">Checks if this query is collocated.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#isDistributedJoins()">isDistributedJoins</a></strong>()</code> |
| <div class="block">Check if distributed joins are enabled for this query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#isEnforceJoinOrder()">isEnforceJoinOrder</a></strong>()</code> |
| <div class="block">Checks if join order of tables if enforced.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setArgs(java.lang.Object...)">setArgs</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>... args)</code> |
| <div class="block">Sets SQL arguments.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setCollocated(boolean)">setCollocated</a></strong>(boolean collocated)</code> |
| <div class="block">Sets flag defining if this query is collocated.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setDistributedJoins(boolean)">setDistributedJoins</a></strong>(boolean distributedJoins)</code> |
| <div class="block">Specify if distributed joins are enabled for this query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setEnforceJoinOrder(boolean)">setEnforceJoinOrder</a></strong>(boolean enforceJoinOrder)</code> |
| <div class="block">Sets flag to enforce join order of tables in the query.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setLocal(boolean)">setLocal</a></strong>(boolean loc)</code> |
| <div class="block">Sets whether this query should be executed on local node only.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setPageSize(int)">setPageSize</a></strong>(int pageSize)</code> |
| <div class="block">Sets optional page size, if <code>0</code>, then default is used.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#setSql(java.lang.String)">setSql</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql)</code> |
| <div class="block">Sets SQL clause.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html#toString()">toString</a></strong>()</code></td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.ignite.cache.query.<a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a></h3> |
| <code><a href="../../../../../org/apache/ignite/cache/query/Query.html#getPageSize()">getPageSize</a>, <a href="../../../../../org/apache/ignite/cache/query/Query.html#isLocal()">isLocal</a></code></li> |
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| <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://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="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://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="http://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="http://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="http://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="http://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="http://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="http://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> |
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| <h3>Constructor Detail</h3> |
| <a name="SqlFieldsQuery(java.lang.String)"> |
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| <h4>SqlFieldsQuery</h4> |
| <pre>public SqlFieldsQuery(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql)</pre> |
| <div class="block">Constructs SQL fields query.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - SQL query.</dd></dl> |
| </li> |
| </ul> |
| <a name="SqlFieldsQuery(java.lang.String, boolean)"> |
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| <h4>SqlFieldsQuery</h4> |
| <pre>public SqlFieldsQuery(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql, |
| boolean collocated)</pre> |
| <div class="block">Constructs SQL fields query.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - SQL query.</dd><dd><code>collocated</code> - Collocated flag.</dd></dl> |
| </li> |
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| <a name="getSql()"> |
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| <h4>getSql</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getSql()</pre> |
| <div class="block">Gets SQL clause.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>SQL clause.</dd></dl> |
| </li> |
| </ul> |
| <a name="setSql(java.lang.String)"> |
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| <h4>setSql</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setSql(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> sql)</pre> |
| <div class="block">Sets SQL clause.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - SQL clause.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> For chaining.</dd></dl> |
| </li> |
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| <a name="getArgs()"> |
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| <h4>getArgs</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[] getArgs()</pre> |
| <div class="block">Gets SQL arguments.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>SQL arguments.</dd></dl> |
| </li> |
| </ul> |
| <a name="setArgs(java.lang.Object...)"> |
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| <h4>setArgs</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setArgs(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>... args)</pre> |
| <div class="block">Sets SQL arguments.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>args</code> - SQL arguments.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> For chaining.</dd></dl> |
| </li> |
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| <h4>isCollocated</h4> |
| <pre>public boolean isCollocated()</pre> |
| <div class="block">Checks if this query is collocated.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd><code>true</code> If the query is collocated.</dd></dl> |
| </li> |
| </ul> |
| <a name="setCollocated(boolean)"> |
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| <h4>setCollocated</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setCollocated(boolean collocated)</pre> |
| <div class="block">Sets flag defining if this query is collocated.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>collocated</code> - Flag value.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> For chaining.</dd></dl> |
| </li> |
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| <a name="isEnforceJoinOrder()"> |
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| <ul class="blockList"> |
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| <h4>isEnforceJoinOrder</h4> |
| <pre>public boolean isEnforceJoinOrder()</pre> |
| <div class="block">Checks if join order of tables if enforced.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Flag value.</dd></dl> |
| </li> |
| </ul> |
| <a name="setEnforceJoinOrder(boolean)"> |
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| <h4>setEnforceJoinOrder</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setEnforceJoinOrder(boolean enforceJoinOrder)</pre> |
| <div class="block">Sets flag to enforce join order of tables in the query. If set to <code>true</code> |
| query optimizer will not reorder tables in join. By default is <code>false</code>. |
| <p> |
| It is not recommended to enable this property until you are sure that |
| your indexes and the query itself are correct and tuned as much as possible but |
| query optimizer still produces wrong join order.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>enforceJoinOrder</code> - Flag value.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> For chaining.</dd></dl> |
| </li> |
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| <a name="setDistributedJoins(boolean)"> |
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| <h4>setDistributedJoins</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setDistributedJoins(boolean distributedJoins)</pre> |
| <div class="block">Specify if distributed joins are enabled for this query.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>distributedJoins</code> - Distributed joins enabled.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> For chaining.</dd></dl> |
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| <h4>isDistributedJoins</h4> |
| <pre>public boolean isDistributedJoins()</pre> |
| <div class="block">Check if distributed joins are enabled for this query.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd><code>true</code> If distributed joind enabled.</dd></dl> |
| </li> |
| </ul> |
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| <h4>setPageSize</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setPageSize(int pageSize)</pre> |
| <div class="block">Sets optional page size, if <code>0</code>, then default is used.</div> |
| <dl> |
| <dt><strong>Overrides:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/cache/query/Query.html#setPageSize(int)">setPageSize</a></code> in class <code><a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><?>></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>pageSize</code> - Optional page size.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="setLocal(boolean)"> |
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| </a> |
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| <h4>setLocal</h4> |
| <pre>public <a href="../../../../../org/apache/ignite/cache/query/SqlFieldsQuery.html" title="class in org.apache.ignite.cache.query">SqlFieldsQuery</a> setLocal(boolean loc)</pre> |
| <div class="block">Sets whether this query should be executed on local node only.</div> |
| <dl> |
| <dt><strong>Overrides:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/cache/query/Query.html#setLocal(boolean)">setLocal</a></code> in class <code><a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><?>></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>loc</code> - Local flag.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>this</code> for chaining.</dd></dl> |
| </li> |
| </ul> |
| <a name="toString()"> |
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| <h4>toString</h4> |
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| <dl> |
| <dt><strong>Overrides:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/cache/query/Query.html#toString()">toString</a></code> in class <code><a href="../../../../../org/apache/ignite/cache/query/Query.html" title="class in org.apache.ignite.cache.query">Query</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><?>></code></dd> |
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