--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.sql.rowset/share/classes/javax/sql/rowset/JoinRowSet.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,537 @@
+/*
+ * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.sql.rowset;
+
+import java.sql.*;
+import javax.sql.*;
+import javax.naming.*;
+import java.io.*;
+import java.math.*;
+import java.util.*;
+
+import javax.sql.rowset.*;
+
+/**
+ * The <code>JoinRowSet</code> interface provides a mechanism for combining related
+ * data from different <code>RowSet</code> objects into one <code>JoinRowSet</code>
+ * object, which represents an SQL <code>JOIN</code>.
+ * In other words, a <code>JoinRowSet</code> object acts as a
+ * container for the data from <code>RowSet</code> objects that form an SQL
+ * <code>JOIN</code> relationship.
+ * <P>
+ * The <code>Joinable</code> interface provides the methods for setting,
+ * retrieving, and unsetting a match column, the basis for
+ * establishing an SQL <code>JOIN</code> relationship. The match column may
+ * alternatively be set by supplying it to the appropriate version of the
+ * <code>JointRowSet</code> method <code>addRowSet</code>.
+ *
+ * <h3>1.0 Overview</h3>
+ * Disconnected <code>RowSet</code> objects (<code>CachedRowSet</code> objects
+ * and implementations extending the <code>CachedRowSet</code> interface)
+ * do not have a standard way to establish an SQL <code>JOIN</code> between
+ * <code>RowSet</code> objects without the expensive operation of
+ * reconnecting to the data source. The <code>JoinRowSet</code>
+ * interface is specifically designed to address this need.
+ * <P>
+ * Any <code>RowSet</code> object
+ * can be added to a <code>JoinRowSet</code> object to become
+ * part of an SQL <code>JOIN</code> relationship. This means that both connected
+ * and disconnected <code>RowSet</code> objects can be part of a <code>JOIN</code>.
+ * <code>RowSet</code> objects operating in a connected environment
+ * (<code>JdbcRowSet</code> objects) are
+ * encouraged to use the database to which they are already
+ * connected to establish SQL <code>JOIN</code> relationships between
+ * tables directly. However, it is possible for a
+ * <code>JdbcRowSet</code> object to be added to a <code>JoinRowSet</code> object
+ * if necessary.
+ * <P>
+ * Any number of <code>RowSet</code> objects can be added to an
+ * instance of <code>JoinRowSet</code> provided that they
+ * can be related in an SQL <code>JOIN</code>.
+ * By definition, the SQL <code>JOIN</code> statement is used to
+ * combine the data contained in two or more relational database tables based
+ * upon a common attribute. The <code>Joinable</code> interface provides the methods
+ * for establishing a common attribute, which is done by setting a
+ * <i>match column</i>. The match column commonly coincides with
+ * the primary key, but there is
+ * no requirement that the match column be the same as the primary key.
+ * By establishing and then enforcing column matches,
+ * a <code>JoinRowSet</code> object establishes <code>JOIN</code> relationships
+ * between <code>RowSet</code> objects without the assistance of an available
+ * relational database.
+ * <P>
+ * The type of <code>JOIN</code> to be established is determined by setting
+ * one of the <code>JoinRowSet</code> constants using the method
+ * <code>setJoinType</code>. The following SQL <code>JOIN</code> types can be set:
+ * <UL>
+ * <LI><code>CROSS_JOIN</code>
+ * <LI><code>FULL_JOIN</code>
+ * <LI><code>INNER_JOIN</code> - the default if no <code>JOIN</code> type has been set
+ * <LI><code>LEFT_OUTER_JOIN</code>
+ * <LI><code>RIGHT_OUTER_JOIN</code>
+ * </UL>
+ * Note that if no type is set, the <code>JOIN</code> will automatically be an
+ * inner join. The comments for the fields in the
+ * <code>JoinRowSet</code> interface explain these <code>JOIN</code> types, which are
+ * standard SQL <code>JOIN</code> types.
+ *
+ * <h3>2.0 Using a <code>JoinRowSet</code> Object for Creating a <code>JOIN</code></h3>
+ * When a <code>JoinRowSet</code> object is created, it is empty.
+ * The first <code>RowSet</code> object to be added becomes the basis for the
+ * <code>JOIN</code> relationship.
+ * Applications must determine which column in each of the
+ * <code>RowSet</code> objects to be added to the <code>JoinRowSet</code> object
+ * should be the match column. All of the
+ * <code>RowSet</code> objects must contain a match column, and the values in
+ * each match column must be ones that can be compared to values in the other match
+ * columns. The columns do not have to have the same name, though they often do,
+ * and they do not have to store the exact same data type as long as the data types
+ * can be compared.
+ * <P>
+ * A match column can be set in two ways:
+ * <ul>
+ * <li>By calling the <code>Joinable</code> method <code>setMatchColumn</code><br>
+ * This is the only method that can set the match column before a <code>RowSet</code>
+ * object is added to a <code>JoinRowSet</code> object. The <code>RowSet</code> object
+ * must have implemented the <code>Joinable</code> interface in order to use the method
+ * <code>setMatchColumn</code>. Once the match column value
+ * has been set, this method can be used to reset the match column at any time.
+ * <li>By calling one of the versions of the <code>JoinRowSet</code> method
+ * <code>addRowSet</code> that takes a column name or number (or an array of
+ * column names or numbers)<BR>
+ * Four of the five <code>addRowSet</code> methods take a match column as a parameter.
+ * These four methods set or reset the match column at the time a <code>RowSet</code>
+ * object is being added to a <code>JoinRowSet</code> object.
+ * </ul>
+ * <h3>3.0 Sample Usage</h3>
+ * <p>
+ * The following code fragment adds two <code>CachedRowSet</code>
+ * objects to a <code>JoinRowSet</code> object. Note that in this example,
+ * no SQL <code>JOIN</code> type is set, so the default <code>JOIN</code> type,
+ * which is <i>INNER_JOIN</i>, is established.
+ * <p>
+ * In the following code fragment, the table <code>EMPLOYEES</code>, whose match
+ * column is set to the first column (<code>EMP_ID</code>), is added to the
+ * <code>JoinRowSet</code> object <i>jrs</i>. Then
+ * the table <code>ESSP_BONUS_PLAN</code>, whose match column is likewise
+ * the <code>EMP_ID</code> column, is added. When this second
+ * table is added to <i>jrs</i>, only the rows in
+ * <code>ESSP_BONUS_PLAN</code> whose <code>EMP_ID</code> value matches an
+ * <code>EMP_ID</code> value in the <code>EMPLOYEES</code> table are added.
+ * In this case, everyone in the bonus plan is an employee, so all of the rows
+ * in the table <code>ESSP_BONUS_PLAN</code> are added to the <code>JoinRowSet</code>
+ * object. In this example, both <code>CachedRowSet</code> objects being added
+ * have implemented the <code>Joinable</code> interface and can therefore call
+ * the <code>Joinable</code> method <code>setMatchColumn</code>.
+ * <PRE>
+ * JoinRowSet jrs = new JoinRowSetImpl();
+ *
+ * ResultSet rs1 = stmt.executeQuery("SELECT * FROM EMPLOYEES");
+ * CachedRowSet empl = new CachedRowSetImpl();
+ * empl.populate(rs1);
+ * empl.setMatchColumn(1);
+ * jrs.addRowSet(empl);
+ *
+ * ResultSet rs2 = stmt.executeQuery("SELECT * FROM ESSP_BONUS_PLAN");
+ * CachedRowSet bonus = new CachedRowSetImpl();
+ * bonus.populate(rs2);
+ * bonus.setMatchColumn(1); // EMP_ID is the first column
+ * jrs.addRowSet(bonus);
+ * </PRE>
+ * <P>
+ * At this point, <i>jrs</i> is an inside JOIN of the two <code>RowSet</code> objects
+ * based on their <code>EMP_ID</code> columns. The application can now browse the
+ * combined data as if it were browsing one single <code>RowSet</code> object.
+ * Because <i>jrs</i> is itself a <code>RowSet</code> object, an application can
+ * navigate or modify it using <code>RowSet</code> methods.
+ * <PRE>
+ * jrs.first();
+ * int employeeID = jrs.getInt(1);
+ * String employeeName = jrs.getString(2);
+ * </PRE>
+ * <P>
+ * Note that because the SQL <code>JOIN</code> must be enforced when an application
+ * adds a second or subsequent <code>RowSet</code> object, there
+ * may be an initial degradation in performance while the <code>JOIN</code> is
+ * being performed.
+ * <P>
+ * The following code fragment adds an additional <code>CachedRowSet</code> object.
+ * In this case, the match column (<code>EMP_ID</code>) is set when the
+ * <code>CachedRowSet</code> object is added to the <code>JoinRowSet</code> object.
+ * <PRE>
+ * ResultSet rs3 = stmt.executeQuery("SELECT * FROM 401K_CONTRIB");
+ * CachedRowSet fourO1k = new CachedRowSetImpl();
+ * four01k.populate(rs3);
+ * jrs.addRowSet(four01k, 1);
+ * </PRE>
+ * <P>
+ * The <code>JoinRowSet</code> object <i>jrs</i> now contains values from all three
+ * tables. The data in each row in <i>four01k</i> in which the value for the
+ * <code>EMP_ID</code> column matches a value for the <code>EMP_ID</code> column
+ * in <i>jrs</i> has been added to <i>jrs</i>.
+ *
+ * <h3>4.0 <code>JoinRowSet</code> Methods</h3>
+ * The <code>JoinRowSet</code> interface supplies several methods for adding
+ * <code>RowSet</code> objects and for getting information about the
+ * <code>JoinRowSet</code> object.
+ * <UL>
+ * <LI>Methods for adding one or more <code>RowSet</code> objects<BR>
+ * These methods allow an application to add one <code>RowSet</code> object
+ * at a time or to add multiple <code>RowSet</code> objects at one time. In
+ * either case, the methods may specify the match column for each
+ * <code>RowSet</code> object being added.
+ * <LI>Methods for getting information<BR>
+ * One method retrieves the <code>RowSet</code> objects in the
+ * <code>JoinRowSet</code> object, and another method retrieves the
+ * <code>RowSet</code> names. A third method retrieves either the SQL
+ * <code>WHERE</code> clause used behind the scenes to form the
+ * <code>JOIN</code> or a text description of what the <code>WHERE</code>
+ * clause does.
+ * <LI>Methods related to the type of <code>JOIN</code><BR>
+ * One method sets the <code>JOIN</code> type, and five methods find out whether
+ * the <code>JoinRowSet</code> object supports a given type.
+ * <LI>A method to make a separate copy of the <code>JoinRowSet</code> object<BR>
+ * This method creates a copy that can be persisted to the data source.
+ * </UL>
+ *
+ * @since 1.5
+ */
+
+public interface JoinRowSet extends WebRowSet {
+
+ /**
+ * Adds the given <code>RowSet</code> object to this <code>JoinRowSet</code>
+ * object. If the <code>RowSet</code> object
+ * is the first to be added to this <code>JoinRowSet</code>
+ * object, it forms the basis of the <code>JOIN</code> relationship to be
+ * established.
+ * <P>
+ * This method should be used only when the given <code>RowSet</code>
+ * object already has a match column that was set with the <code>Joinable</code>
+ * method <code>setMatchColumn</code>.
+ * <p>
+ * Note: A <code>Joinable</code> object is any <code>RowSet</code> object
+ * that has implemented the <code>Joinable</code> interface.
+ *
+ * @param rowset the <code>RowSet</code> object that is to be added to this
+ * <code>JoinRowSet</code> object; it must implement the
+ * <code>Joinable</code> interface and have a match column set
+ * @throws SQLException if (1) an empty rowset is added to the to this
+ * <code>JoinRowSet</code> object, (2) a match column has not been
+ * set for <i>rowset</i>, or (3) <i>rowset</i>
+ * violates the active <code>JOIN</code>
+ * @see Joinable#setMatchColumn
+ */
+ public void addRowSet(Joinable rowset) throws SQLException;
+
+ /**
+ * Adds the given <code>RowSet</code> object to this <code>JoinRowSet</code>
+ * object and sets the designated column as the match column for
+ * the <code>RowSet</code> object. If the <code>RowSet</code> object
+ * is the first to be added to this <code>JoinRowSet</code>
+ * object, it forms the basis of the <code>JOIN</code> relationship to be
+ * established.
+ * <P>
+ * This method should be used when <i>RowSet</i> does not already have a match
+ * column set.
+ *
+ * @param rowset the <code>RowSet</code> object that is to be added to this
+ * <code>JoinRowSet</code> object; it may implement the
+ * <code>Joinable</code> interface
+ * @param columnIdx an <code>int</code> that identifies the column to become the
+ * match column
+ * @throws SQLException if (1) <i>rowset</i> is an empty rowset or
+ * (2) <i>rowset</i> violates the active <code>JOIN</code>
+ * @see Joinable#unsetMatchColumn
+ */
+ public void addRowSet(RowSet rowset, int columnIdx) throws SQLException;
+
+ /**
+ * Adds <i>rowset</i> to this <code>JoinRowSet</code> object and
+ * sets the designated column as the match column. If <i>rowset</i>
+ * is the first to be added to this <code>JoinRowSet</code>
+ * object, it forms the basis for the <code>JOIN</code> relationship to be
+ * established.
+ * <P>
+ * This method should be used when the given <code>RowSet</code> object
+ * does not already have a match column.
+ *
+ * @param rowset the <code>RowSet</code> object that is to be added to this
+ * <code>JoinRowSet</code> object; it may implement the
+ * <code>Joinable</code> interface
+ * @param columnName the <code>String</code> object giving the name of the
+ * column to be set as the match column
+ * @throws SQLException if (1) <i>rowset</i> is an empty rowset or
+ * (2) the match column for <i>rowset</i> does not satisfy the
+ * conditions of the <code>JOIN</code>
+ */
+ public void addRowSet(RowSet rowset,
+ String columnName) throws SQLException;
+
+ /**
+ * Adds one or more <code>RowSet</code> objects contained in the given
+ * array of <code>RowSet</code> objects to this <code>JoinRowSet</code>
+ * object and sets the match column for
+ * each of the <code>RowSet</code> objects to the match columns
+ * in the given array of column indexes. The first element in
+ * <i>columnIdx</i> is set as the match column for the first
+ * <code>RowSet</code> object in <i>rowset</i>, the second element of
+ * <i>columnIdx</i> is set as the match column for the second element
+ * in <i>rowset</i>, and so on.
+ * <P>
+ * The first <code>RowSet</code> object added to this <code>JoinRowSet</code>
+ * object forms the basis for the <code>JOIN</code> relationship.
+ * <P>
+ * This method should be used when the given <code>RowSet</code> object
+ * does not already have a match column.
+ *
+ * @param rowset an array of one or more <code>RowSet</code> objects
+ * to be added to the <code>JOIN</code>; it may implement the
+ * <code>Joinable</code> interface
+ * @param columnIdx an array of <code>int</code> values indicating the index(es)
+ * of the columns to be set as the match columns for the <code>RowSet</code>
+ * objects in <i>rowset</i>
+ * @throws SQLException if (1) an empty rowset is added to this
+ * <code>JoinRowSet</code> object, (2) a match column is not set
+ * for a <code>RowSet</code> object in <i>rowset</i>, or (3)
+ * a <code>RowSet</code> object being added violates the active
+ * <code>JOIN</code>
+ */
+ public void addRowSet(RowSet[] rowset,
+ int[] columnIdx) throws SQLException;
+
+ /**
+ * Adds one or more <code>RowSet</code> objects contained in the given
+ * array of <code>RowSet</code> objects to this <code>JoinRowSet</code>
+ * object and sets the match column for
+ * each of the <code>RowSet</code> objects to the match columns
+ * in the given array of column names. The first element in
+ * <i>columnName</i> is set as the match column for the first
+ * <code>RowSet</code> object in <i>rowset</i>, the second element of
+ * <i>columnName</i> is set as the match column for the second element
+ * in <i>rowset</i>, and so on.
+ * <P>
+ * The first <code>RowSet</code> object added to this <code>JoinRowSet</code>
+ * object forms the basis for the <code>JOIN</code> relationship.
+ * <P>
+ * This method should be used when the given <code>RowSet</code> object(s)
+ * does not already have a match column.
+ *
+ * @param rowset an array of one or more <code>RowSet</code> objects
+ * to be added to the <code>JOIN</code>; it may implement the
+ * <code>Joinable</code> interface
+ * @param columnName an array of <code>String</code> values indicating the
+ * names of the columns to be set as the match columns for the
+ * <code>RowSet</code> objects in <i>rowset</i>
+ * @throws SQLException if (1) an empty rowset is added to this
+ * <code>JoinRowSet</code> object, (2) a match column is not set
+ * for a <code>RowSet</code> object in <i>rowset</i>, or (3)
+ * a <code>RowSet</code> object being added violates the active
+ * <code>JOIN</code>
+ */
+ public void addRowSet(RowSet[] rowset,
+ String[] columnName) throws SQLException;
+
+ /**
+ * Returns a <code>Collection</code> object containing the
+ * <code>RowSet</code> objects that have been added to this
+ * <code>JoinRowSet</code> object.
+ * This should return the 'n' number of RowSet contained
+ * within the <code>JOIN</code> and maintain any updates that have occurred while in
+ * this union.
+ *
+ * @return a <code>Collection</code> object consisting of the
+ * <code>RowSet</code> objects added to this <code>JoinRowSet</code>
+ * object
+ * @throws SQLException if an error occurs generating the
+ * <code>Collection</code> object to be returned
+ */
+ public Collection<?> getRowSets() throws java.sql.SQLException;
+
+ /**
+ * Returns a <code>String</code> array containing the names of the
+ * <code>RowSet</code> objects added to this <code>JoinRowSet</code>
+ * object.
+ *
+ * @return a <code>String</code> array of the names of the
+ * <code>RowSet</code> objects in this <code>JoinRowSet</code>
+ * object
+ * @throws SQLException if an error occurs retrieving the names of
+ * the <code>RowSet</code> objects
+ * @see CachedRowSet#setTableName
+ */
+ public String[] getRowSetNames() throws java.sql.SQLException;
+
+ /**
+ * Creates a new <code>CachedRowSet</code> object containing the
+ * data in this <code>JoinRowSet</code> object, which can be saved
+ * to a data source using the <code>SyncProvider</code> object for
+ * the <code>CachedRowSet</code> object.
+ * <P>
+ * If any updates or modifications have been applied to the JoinRowSet
+ * the CachedRowSet returned by the method will not be able to persist
+ * it's changes back to the originating rows and tables in the
+ * in the datasource. The CachedRowSet instance returned should not
+ * contain modification data and it should clear all properties of
+ * it's originating SQL statement. An application should reset the
+ * SQL statement using the <code>RowSet.setCommand</code> method.
+ * <p>
+ * In order to allow changes to be persisted back to the datasource
+ * to the originating tables, the <code>acceptChanges</code> method
+ * should be used and called on a JoinRowSet object instance. Implementations
+ * can leverage the internal data and update tracking in their
+ * implementations to interact with the SyncProvider to persist any
+ * changes.
+ *
+ * @return a CachedRowSet containing the contents of the JoinRowSet
+ * @throws SQLException if an error occurs assembling the CachedRowSet
+ * object
+ * @see javax.sql.RowSet
+ * @see javax.sql.rowset.CachedRowSet
+ * @see javax.sql.rowset.spi.SyncProvider
+ */
+ public CachedRowSet toCachedRowSet() throws java.sql.SQLException;
+
+ /**
+ * Indicates if CROSS_JOIN is supported by a JoinRowSet
+ * implementation
+ *
+ * @return true if the CROSS_JOIN is supported; false otherwise
+ */
+ public boolean supportsCrossJoin();
+
+ /**
+ * Indicates if INNER_JOIN is supported by a JoinRowSet
+ * implementation
+ *
+ * @return true is the INNER_JOIN is supported; false otherwise
+ */
+ public boolean supportsInnerJoin();
+
+ /**
+ * Indicates if LEFT_OUTER_JOIN is supported by a JoinRowSet
+ * implementation
+ *
+ * @return true is the LEFT_OUTER_JOIN is supported; false otherwise
+ */
+ public boolean supportsLeftOuterJoin();
+
+ /**
+ * Indicates if RIGHT_OUTER_JOIN is supported by a JoinRowSet
+ * implementation
+ *
+ * @return true is the RIGHT_OUTER_JOIN is supported; false otherwise
+ */
+ public boolean supportsRightOuterJoin();
+
+ /**
+ * Indicates if FULL_JOIN is supported by a JoinRowSet
+ * implementation
+ *
+ * @return true is the FULL_JOIN is supported; false otherwise
+ */
+ public boolean supportsFullJoin();
+
+ /**
+ * Allow the application to adjust the type of <code>JOIN</code> imposed
+ * on tables contained within the JoinRowSet object instance.
+ * Implementations should throw a SQLException if they do
+ * not support a given <code>JOIN</code> type.
+ *
+ * @param joinType the standard JoinRowSet.XXX static field definition
+ * of a SQL <code>JOIN</code> to re-configure a JoinRowSet instance on
+ * the fly.
+ * @throws SQLException if an unsupported <code>JOIN</code> type is set
+ * @see #getJoinType
+ */
+ public void setJoinType(int joinType) throws SQLException;
+
+ /**
+ * Return a SQL-like description of the WHERE clause being used
+ * in a JoinRowSet object. An implementation can describe
+ * the WHERE clause of the SQL <code>JOIN</code> by supplying a SQL
+ * strings description of <code>JOIN</code> or provide a textual
+ * description to assist applications using a <code>JoinRowSet</code>
+ *
+ * @return whereClause a textual or SQL description of the logical
+ * WHERE clause used in the JoinRowSet instance
+ * @throws SQLException if an error occurs in generating a representation
+ * of the WHERE clause.
+ */
+ public String getWhereClause() throws SQLException;
+
+ /**
+ * Returns a <code>int</code> describing the set SQL <code>JOIN</code> type
+ * governing this JoinRowSet instance. The returned type will be one of
+ * standard JoinRowSet types: <code>CROSS_JOIN</code>, <code>INNER_JOIN</code>,
+ * <code>LEFT_OUTER_JOIN</code>, <code>RIGHT_OUTER_JOIN</code> or
+ * <code>FULL_JOIN</code>.
+ *
+ * @return joinType one of the standard JoinRowSet static field
+ * definitions of a SQL <code>JOIN</code>. <code>JoinRowSet.INNER_JOIN</code>
+ * is returned as the default <code>JOIN</code> type is no type has been
+ * explicitly set.
+ * @throws SQLException if an error occurs determining the SQL <code>JOIN</code>
+ * type supported by the JoinRowSet instance.
+ * @see #setJoinType
+ */
+ public int getJoinType() throws SQLException;
+
+ /**
+ * An ANSI-style <code>JOIN</code> providing a cross product of two tables
+ */
+ public static int CROSS_JOIN = 0;
+
+ /**
+ * An ANSI-style <code>JOIN</code> providing a inner join between two tables. Any
+ * unmatched rows in either table of the join should be discarded.
+ */
+ public static int INNER_JOIN = 1;
+
+ /**
+ * An ANSI-style <code>JOIN</code> providing a left outer join between two
+ * tables. In SQL, this is described where all records should be
+ * returned from the left side of the JOIN statement.
+ */
+ public static int LEFT_OUTER_JOIN = 2;
+
+ /**
+ * An ANSI-style <code>JOIN</code> providing a right outer join between
+ * two tables. In SQL, this is described where all records from the
+ * table on the right side of the JOIN statement even if the table
+ * on the left has no matching record.
+ */
+ public static int RIGHT_OUTER_JOIN = 3;
+
+ /**
+ * An ANSI-style <code>JOIN</code> providing a full JOIN. Specifies that all
+ * rows from either table be returned regardless of matching
+ * records on the other table.
+ */
+ public static int FULL_JOIN = 4;
+
+
+}