_QueryExecuter


1   package com.daffodilwoods.daffodildb.server.sql99.dql.resultset;
2   
3   import com.daffodilwoods.daffodildb.server.sql99.dql.queryexpression.*;
4   import com.daffodilwoods.daffodildb.server.sql99.dql.iterator._Iterator;
5   
6   import com.daffodilwoods.database.resource.DException;
7   import com.daffodilwoods.daffodildb.server.serversystem._ServerSession;
8   import com.daffodilwoods.daffodildb.server.sql99.utils._VariableValues;
9   
10  /**
11   * It is used to obtain the resultset from select query. It provides the
12   * functionality to retrieve different type of resultsets based on the resultset
13   * type(SCROLLABLE,UPDTABLE,NONSCROLLABLE).
14   * <p>Title: </p>
15   * <p>Description: </p>
16   * <p>Copyright: Copyright (c) 2003</p>
17   * <p>Company: </p>
18   * @author unascribed
19   * @version 1.0
20   */
21  
22  public interface _QueryExecuter {
23  
24     /**
25      * These methods are required to obtain resultset based on the type of
26      * resultset(SCROLLABLE,UPDTABLE,NONSCROLLABLE). The values of parameters
27      * are passed in variablevalues.
28      * @param variableValues
29      * @return resultset.
30      * @throws DException
31      */
32  
33     Object   executeNonScrollable(_VariableValues variableValues) throws DException;
34     Object   executeScrollable(_VariableValues variableValues) throws DException;
35     Object   executeUpdatable(_VariableValues variableValues) throws DException;
36  
37     /**
38      * These methods are required to obtain resultset based on the type of
39      * resultset(SCROLLABLE,UPDTABLE,NONSCROLLABLE). The values of parameters
40      * are passed.
41      * @param values
42      * @return resultset.
43      * @throws DException
44      */
45  
46     Object   executeNonScrollable(Object  [] values) throws DException;
47     Object   executeScrollable(Object  [] values) throws DException;
48     Object   executeUpdatable(Object  [] values) throws DException;
49  
50     /**
51      * These methods are required to obtain resultset based on the type of
52      * resultset(SCROLLABLE,UPDTABLE,NONSCROLLABLE). These are needed when we
53      * want to share queryplan among different users.
54      * @param variableValues contains values of parameters
55      * @return resultset.
56      * @throws DException
57      */
58  
59     Object   executeNonScrollableFresh(_VariableValues variableValues) throws DException;
60     Object   executeScrollableFresh(_VariableValues variableValues) throws DException;
61     Object   executeUpdatableFresh(_VariableValues variableValues) throws DException;
62  
63     /**
64      * These methods are required to obtain resultset based on the type of
65      * resultset(SCROLLABLE,UPDTABLE,NONSCROLLABLE). These are needed when we
66      * want to share queryplan among different users.
67      * @param values represents values of parameters.
68      * @return resultset.
69      * @throws DException
70      */
71  
72     Object   executeNonScrollableFresh(Object  [] values) throws DException;
73     Object   executeScrollableFresh(Object  [] values) throws DException;
74     Object   executeUpdatableFresh(Object  [] values) throws DException;
75     Object   executeForFresh(_VariableValues parm1) throws DException;
76  }
77
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