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Java > Open Source Codes > org > apache > derby > impl > sql > execute > rts > RealScalarAggregateStatistics


1 /*
2
3    Derby - Class org.apache.derby.impl.sql.execute.rts.RealScalarAggregateStatistics
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.impl.sql.execute.rts;
23
24 import org.apache.derby.iapi.services.io.StoredFormatIds;
25
26 import org.apache.derby.iapi.services.i18n.MessageService;
27 import org.apache.derby.iapi.reference.SQLState;
28
29 import org.apache.derby.iapi.services.io.FormatableHashtable;
30
31 import java.io.ObjectOutput JavaDoc;
32 import java.io.ObjectInput JavaDoc;
33 import java.io.IOException JavaDoc;
34
35 /**
36   ResultSetStatistics implemenation for ScalarAggregateResultSet.
37
38   @author jerry
39
40 */
41 public class RealScalarAggregateStatistics
42     extends RealNoPutResultSetStatistics
43 {
44
45     /* Leave these fields public for object inspectors */
46     public int rowsInput = 0;
47     public boolean indexKeyOptimization;
48     public ResultSetStatistics childResultSetStatistics;
49
50     // CONSTRUCTORS
51
52     /**
53      *
54      *
55      */
56     public RealScalarAggregateStatistics(
57                         int numOpens,
58                         int rowsSeen,
59                         int rowsFiltered,
60                         long constructorTime,
61                         long openTime,
62                         long nextTime,
63                         long closeTime,
64                         int resultSetNumber,
65                         boolean indexKeyOptimization,
66                         int rowsInput,
67                         double optimizerEstimatedRowCount,
68                         double optimizerEstimatedCost,
69                         ResultSetStatistics childResultSetStatistics
70                         )
71     {
72         super(
73             numOpens,
74             rowsSeen,
75             rowsFiltered,
76             constructorTime,
77             openTime,
78             nextTime,
79             closeTime,
80             resultSetNumber,
81             optimizerEstimatedRowCount,
82             optimizerEstimatedCost
83             );
84         this.indexKeyOptimization = indexKeyOptimization;
85         this.rowsInput = rowsInput;
86         this.childResultSetStatistics = childResultSetStatistics;
87     }
88
89     // ResultSetStatistics methods
90
91     /**
92      * Return the statement execution plan as a String.
93      *
94      * @param depth Indentation level.
95      *
96      * @return String The statement execution plan as a String.
97      */
98     public String JavaDoc getStatementExecutionPlanText(int depth)
99     {
100         initFormatInfo(depth);
101
102         return
103             indent + MessageService.getTextMessage(
104                                                 SQLState.RTS_SCALAR_AGG_RS) +
105                 ":\n" +
106             indent + MessageService.getTextMessage(SQLState.RTS_NUM_OPENS) +
107                 " = " + numOpens + "\n" +
108             indent + MessageService.getTextMessage(SQLState.RTS_ROWS_INPUT) +
109                 " = " + rowsInput + "\n" +
110             dumpTimeStats(indent, subIndent) + "\n" +
111             dumpEstimatedCosts(subIndent) + "\n" +
112             indent + MessageService.getTextMessage(
113                                                 SQLState.RTS_INDEX_KEY_OPT) +
114                 " = " + indexKeyOptimization + "\n" +
115             indent + MessageService.getTextMessage(SQLState.RTS_SOURCE_RS) +
116                 ":\n" +
117             childResultSetStatistics.getStatementExecutionPlanText(
118                                                                 sourceDepth) +
119                 "\n";
120     }
121
122     /**
123      * Return information on the scan nodes from the statement execution
124      * plan as a String.
125      *
126      * @param depth Indentation level.
127      * @param tableName if not NULL then print information for this table only
128      *
129      * @return String The information on the scan nodes from the
130      * statement execution plan as a String.
131      */
132     public String JavaDoc getScanStatisticsText(String JavaDoc tableName, int depth)
133     {
134         return childResultSetStatistics.getScanStatisticsText(tableName, depth);
135     }
136
137     // Class implementation
138
139     public String JavaDoc toString()
140     {
141         return getStatementExecutionPlanText(0);
142     }
143   public java.util.Vector JavaDoc getChildren(){
144     java.util.Vector JavaDoc children = new java.util.Vector JavaDoc();
145     children.addElement(childResultSetStatistics);
146     return children;
147   }
148     /**
149    * Format for display, a name for this node.
150      *
151      */
152   public String JavaDoc getNodeName(){
153     return MessageService.getTextMessage(SQLState.RTS_SCALAR_AGG);
154   }
155 }
156
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