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Java > Open Source Codes > org > apache > derby > iapi > sql > execute > TemporaryRowHolder


1 /*
2
3    Derby - Class org.apache.derby.iapi.sql.execute.TemporaryRowHolder
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.iapi.sql.execute;
23
24 import org.apache.derby.iapi.services.sanity.SanityManager;
25 import org.apache.derby.iapi.error.StandardException;
26 import org.apache.derby.iapi.sql.execute.ExecRow;
27
28 /**
29  * This is a class that is used to temporarily
30  * (non-persistently) hold rows that are used in
31  * language execution. It will store them in an
32  * array, or a temporary conglomerate, depending
33  * on the number of rows.
34  * <p>
35  * It is used for deferred DML processing.
36  *
37  * @author jamie
38  */
39 public interface TemporaryRowHolder
40 {
41     /**
42      * Insert a row
43      *
44      * @param inputRow the row to insert
45      *
46      * @exception StandardException on error
47      */
48     public void insert(ExecRow inputRow)
49         throws StandardException;
50
51     /**
52      * Get a result set for scanning what has been inserted
53      * so far.
54      *
55      * @return a result set to use
56      */
57     public CursorResultSet getResultSet();
58
59     /**
60      * Clean up
61      *
62      * @exception StandardException on error
63      */
64     public void close() throws StandardException;
65
66
67     //returns the conglomerate number it created
68 public long getTemporaryConglomId();
69
70     //return the conglom id of the position index it maintains
71 public long getPositionIndexConglomId();
72
73     //sets the type of the temporary row holder to unique stream
74 public void setRowHolderTypeToUniqueStream();
75
76 }
77
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