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| <div class="subTitle">org.apache.openjpa.kernel</div> |
| <h2 title="Interface QueryHints" class="title">Interface QueryHints</h2> |
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| <pre>public interface <span class="typeNameLabel">QueryHints</span></pre> |
| <div class="block">Standard query hint keys.</div> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_AGGREGATE_LISTENER">HINT_AGGREGATE_LISTENER</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_AGGREGATE_LISTENERS">HINT_AGGREGATE_LISTENERS</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_FILTER_LISTENER">HINT_FILTER_LISTENER</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_FILTER_LISTENERS">HINT_FILTER_LISTENERS</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_FINDER">HINT_IGNORE_FINDER</a></span></code> |
| <div class="block">A directive to ignore any cached finder query for find() operation.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_PREPARED_QUERY">HINT_IGNORE_PREPARED_QUERY</a></span></code> |
| <div class="block">A directive to ignore any prepared SQL that might have been cached |
| against a JPQL query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_FINDER">HINT_INVALIDATE_FINDER</a></span></code> |
| <div class="block">A directive to invalidate any cached finder query.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_PREPARED_QUERY">HINT_INVALIDATE_PREPARED_QUERY</a></span></code> |
| <div class="block">A directive to invalidate any prepared SQL that might have been cached |
| against a JPQL query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_PARAM_MARKER_IN_QUERY">HINT_PARAM_MARKER_IN_QUERY</a></span></code> |
| <div class="block">Hints to signal that the JPQL/SQL query string contains a parameter |
| marker <code>?</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RECACHE_FINDER">HINT_RECACHE_FINDER</a></span></code> |
| <div class="block">A directive to overwrite a cached finder query by a new query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RELAX_BIND_PARAM_TYPE_CHECK">HINT_RELAX_BIND_PARAM_TYPE_CHECK</a></span></code> |
| <div class="block">A boolean directive to relax checking of binding parameter value and the predicate |
| it binds to.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RESULT_COUNT">HINT_RESULT_COUNT</a></span></code> |
| <div class="block">Hint to specify the number of rows to optimize for.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_SUBCLASSES">HINT_SUBCLASSES</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_USE_LITERAL_IN_SQL">HINT_USE_LITERAL_IN_SQL</a></span></code> |
| <div class="block">A boolean directive to generate literal directly into the SQL statement instead of using position parameter, |
| if possible.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="HINT_SUBCLASSES"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_SUBCLASSES</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_SUBCLASSES</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_SUBCLASSES">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_FILTER_LISTENER"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_FILTER_LISTENER</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_FILTER_LISTENER</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_FILTER_LISTENER">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_FILTER_LISTENERS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_FILTER_LISTENERS</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_FILTER_LISTENERS</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_FILTER_LISTENERS">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_AGGREGATE_LISTENER"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_AGGREGATE_LISTENER</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_AGGREGATE_LISTENER</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_AGGREGATE_LISTENER">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_AGGREGATE_LISTENERS</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_AGGREGATE_LISTENERS</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_AGGREGATE_LISTENERS">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_RESULT_COUNT"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_RESULT_COUNT</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_RESULT_COUNT</pre> |
| <div class="block">Hint to specify the number of rows to optimize for.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RESULT_COUNT">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_PARAM_MARKER_IN_QUERY"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_PARAM_MARKER_IN_QUERY</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_PARAM_MARKER_IN_QUERY</pre> |
| <div class="block">Hints to signal that the JPQL/SQL query string contains a parameter |
| marker <code>?</code> character. By default, the query string is parsed |
| to count number of parameters assuming that all <code>?</code> characters |
| designate a bind parameter. This assumption makes the parse faster.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_PARAM_MARKER_IN_QUERY">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_INVALIDATE_PREPARED_QUERY"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_INVALIDATE_PREPARED_QUERY</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_INVALIDATE_PREPARED_QUERY</pre> |
| <div class="block">A directive to invalidate any prepared SQL that might have been cached |
| against a JPQL query. The target SQL corresponding to a JPQL depends on |
| several context parameters such as fetch configuration, lock mode etc. |
| If a query is executed repeatedly and hence its SQL is cached for faster |
| execution then if any of the contextual parameters change across query |
| execution then the user must supply this hint to invalidate the cached |
| SQL query. |
| The alternative to monitor any such change for automatic invalidation |
| has a constant performance penalty for the frequent use case where a |
| query is repeatedly executed in different persistent context with the |
| same fetch plan or locking.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_PREPARED_QUERY"><code>HINT_IGNORE_PREPARED_QUERY</code></a>, |
| <a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_INVALIDATE_PREPARED_QUERY">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_IGNORE_PREPARED_QUERY"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_IGNORE_PREPARED_QUERY</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_IGNORE_PREPARED_QUERY</pre> |
| <div class="block">A directive to ignore any prepared SQL that might have been cached |
| against a JPQL query. The target SQL corresponding to a JPQL depends on |
| several context parameters such as fetch configuration, lock mode etc. |
| If a query is executed repeatedly and hence its SQL is cached for faster |
| execution then if any of the contextual parameters change across query |
| execution then the user must supply this hint to ignore the cached |
| SQL query for the current execution. |
| This is in contrast with invalidation hint that removes the cached |
| version from cache altogether. |
| |
| The cached SQL is retained and subsequent execution of the same query |
| string without this hint will reuse the cached SQL.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_PREPARED_QUERY"><code>HINT_INVALIDATE_PREPARED_QUERY</code></a>, |
| <a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_IGNORE_PREPARED_QUERY">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_IGNORE_FINDER"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_IGNORE_FINDER</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_IGNORE_FINDER</pre> |
| <div class="block">A directive to ignore any cached finder query for find() operation. |
| The cached entry, if any, remains in the cache.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_IGNORE_FINDER">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_INVALIDATE_FINDER"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_INVALIDATE_FINDER</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_INVALIDATE_FINDER</pre> |
| <div class="block">A directive to invalidate any cached finder query.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_INVALIDATE_FINDER">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_RECACHE_FINDER"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>HINT_RECACHE_FINDER</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_RECACHE_FINDER</pre> |
| <div class="block">A directive to overwrite a cached finder query by a new query.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RECACHE_FINDER">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="HINT_RELAX_BIND_PARAM_TYPE_CHECK"> |
| <!-- --> |
| </a> |
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| <h4>HINT_RELAX_BIND_PARAM_TYPE_CHECK</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_RELAX_BIND_PARAM_TYPE_CHECK</pre> |
| <div class="block">A boolean directive to relax checking of binding parameter value and the predicate |
| it binds to.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RELAX_BIND_PARAM_TYPE_CHECK">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>HINT_USE_LITERAL_IN_SQL</h4> |
| <pre>static final <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> HINT_USE_LITERAL_IN_SQL</pre> |
| <div class="block">A boolean directive to generate literal directly into the SQL statement instead of using position parameter, |
| if possible.</div> |
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