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|  | SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | CONSTR | METHOD</FONT></TD> | 
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|  | <H2> | 
|  | <FONT SIZE="-1"> | 
|  | org.apache.openjpa.kernel</FONT> | 
|  | <BR> | 
|  | Interface QueryHints</H2> | 
|  | <HR> | 
|  | <DL> | 
|  | <DT><PRE>public interface <B>QueryHints</B></DL> | 
|  | </PRE> | 
|  |  | 
|  | <P> | 
|  | Standard query hint keys. | 
|  | <P> | 
|  |  | 
|  | <P> | 
|  | <HR> | 
|  |  | 
|  | <P> | 
|  | <!-- =========== FIELD SUMMARY =========== --> | 
|  |  | 
|  | <A NAME="field_summary"><!-- --></A> | 
|  | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | 
|  | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | 
|  | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | 
|  | <B>Field Summary</B></FONT></TH> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_AGGREGATE_LISTENER">HINT_AGGREGATE_LISTENER</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |            </TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_AGGREGATE_LISTENERS">HINT_AGGREGATE_LISTENERS</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |            </TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_FILTER_LISTENER">HINT_FILTER_LISTENER</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |            </TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_FILTER_LISTENERS">HINT_FILTER_LISTENERS</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |            </TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_FINDER">HINT_IGNORE_FINDER</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A directive to ignore any cached finder query for find() operation.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_PREPARED_QUERY">HINT_IGNORE_PREPARED_QUERY</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A directive to ignore any prepared SQL that might have been cached | 
|  | against a JPQL query.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_FINDER">HINT_INVALIDATE_FINDER</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A directive to invalidate any cached finder query.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_PREPARED_QUERY">HINT_INVALIDATE_PREPARED_QUERY</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A directive to invalidate any prepared SQL that might have been cached | 
|  | against a JPQL query.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_PARAM_MARKER_IN_QUERY">HINT_PARAM_MARKER_IN_QUERY</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           Hints to signal that the JPQL/SQL query string contains a parameter | 
|  | marker <code>?</code> character.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RECACHE_FINDER">HINT_RECACHE_FINDER</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A directive to overwrite a cached finder query by a new query.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RELAX_BIND_PARAM_TYPE_CHECK">HINT_RELAX_BIND_PARAM_TYPE_CHECK</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           A boolean directive to relax checking of binding parameter value and the predicate | 
|  | it binds to.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RESULT_COUNT">HINT_RESULT_COUNT</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |           Hint to specify the number of rows to optimize for.</TD> | 
|  | </TR> | 
|  | <TR BGCOLOR="white" CLASS="TableRowColor"> | 
|  | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | 
|  | <CODE>static <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> | 
|  | <TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_SUBCLASSES">HINT_SUBCLASSES</A></B></CODE> | 
|  |  | 
|  | <BR> | 
|  |            </TD> | 
|  | </TR> | 
|  | </TABLE> | 
|  |   | 
|  | <P> | 
|  |  | 
|  | <!-- ============ FIELD DETAIL =========== --> | 
|  |  | 
|  | <A NAME="field_detail"><!-- --></A> | 
|  | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | 
|  | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | 
|  | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> | 
|  | <B>Field Detail</B></FONT></TH> | 
|  | </TR> | 
|  | </TABLE> | 
|  |  | 
|  | <A NAME="HINT_SUBCLASSES"><!-- --></A><H3> | 
|  | HINT_SUBCLASSES</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_SUBCLASSES</B></PRE> | 
|  | <DL> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_SUBCLASSES">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_FILTER_LISTENER"><!-- --></A><H3> | 
|  | HINT_FILTER_LISTENER</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_FILTER_LISTENER</B></PRE> | 
|  | <DL> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_FILTER_LISTENER">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_FILTER_LISTENERS"><!-- --></A><H3> | 
|  | HINT_FILTER_LISTENERS</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_FILTER_LISTENERS</B></PRE> | 
|  | <DL> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_FILTER_LISTENERS">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_AGGREGATE_LISTENER"><!-- --></A><H3> | 
|  | HINT_AGGREGATE_LISTENER</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_AGGREGATE_LISTENER</B></PRE> | 
|  | <DL> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_AGGREGATE_LISTENER">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_AGGREGATE_LISTENERS"><!-- --></A><H3> | 
|  | HINT_AGGREGATE_LISTENERS</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_AGGREGATE_LISTENERS</B></PRE> | 
|  | <DL> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_AGGREGATE_LISTENERS">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_RESULT_COUNT"><!-- --></A><H3> | 
|  | HINT_RESULT_COUNT</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_RESULT_COUNT</B></PRE> | 
|  | <DL> | 
|  | <DD>Hint to specify the number of rows to optimize for. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RESULT_COUNT">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_PARAM_MARKER_IN_QUERY"><!-- --></A><H3> | 
|  | HINT_PARAM_MARKER_IN_QUERY</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_PARAM_MARKER_IN_QUERY</B></PRE> | 
|  | <DL> | 
|  | <DD>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. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_PARAM_MARKER_IN_QUERY">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_INVALIDATE_PREPARED_QUERY"><!-- --></A><H3> | 
|  | HINT_INVALIDATE_PREPARED_QUERY</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_INVALIDATE_PREPARED_QUERY</B></PRE> | 
|  | <DL> | 
|  | <DD>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. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><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></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_IGNORE_PREPARED_QUERY"><!-- --></A><H3> | 
|  | HINT_IGNORE_PREPARED_QUERY</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_IGNORE_PREPARED_QUERY</B></PRE> | 
|  | <DL> | 
|  | <DD>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. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><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></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_IGNORE_FINDER"><!-- --></A><H3> | 
|  | HINT_IGNORE_FINDER</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_IGNORE_FINDER</B></PRE> | 
|  | <DL> | 
|  | <DD>A directive to ignore any cached finder query for find() operation. | 
|  | The cached entry, if any, remains in the cache. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_IGNORE_FINDER">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_INVALIDATE_FINDER"><!-- --></A><H3> | 
|  | HINT_INVALIDATE_FINDER</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_INVALIDATE_FINDER</B></PRE> | 
|  | <DL> | 
|  | <DD>A directive to invalidate any cached finder query. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_INVALIDATE_FINDER">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_RECACHE_FINDER"><!-- --></A><H3> | 
|  | HINT_RECACHE_FINDER</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_RECACHE_FINDER</B></PRE> | 
|  | <DL> | 
|  | <DD>A directive to overwrite a cached finder query by a new query. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RECACHE_FINDER">Constant Field Values</A></DL> | 
|  | </DL> | 
|  | <HR> | 
|  |  | 
|  | <A NAME="HINT_RELAX_BIND_PARAM_TYPE_CHECK"><!-- --></A><H3> | 
|  | HINT_RELAX_BIND_PARAM_TYPE_CHECK</H3> | 
|  | <PRE> | 
|  | static final <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>HINT_RELAX_BIND_PARAM_TYPE_CHECK</B></PRE> | 
|  | <DL> | 
|  | <DD>A boolean directive to relax checking of binding parameter value and the predicate | 
|  | it binds to. | 
|  | <P> | 
|  | <DL> | 
|  | <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.openjpa.kernel.QueryHints.HINT_RELAX_BIND_PARAM_TYPE_CHECK">Constant Field Values</A></DL> | 
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