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| 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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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://java.sun.com/j2se/1.5.0/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> |
| <!-- ========= END OF CLASS DATA ========= --> |
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