Source Code Cross Referenced for RealLastIndexKeyScanStatistics.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » sql » execute » rts » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.sql.execute.rts 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Derby - Class org.apache.derby.impl.sql.execute.rts.RealLastIndexKeyScanStatistics
004:
005:           Licensed to the Apache Software Foundation (ASF) under one or more
006:           contributor license agreements.  See the NOTICE file distributed with
007:           this work for additional information regarding copyright ownership.
008:           The ASF licenses this file to you under the Apache License, Version 2.0
009:           (the "License"); you may not use this file except in compliance with
010:           the License.  You may obtain a copy of the License at
011:
012:              http://www.apache.org/licenses/LICENSE-2.0
013:
014:           Unless required by applicable law or agreed to in writing, software
015:           distributed under the License is distributed on an "AS IS" BASIS,
016:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:           See the License for the specific language governing permissions and
018:           limitations under the License.
019:
020:         */
021:
022:        package org.apache.derby.impl.sql.execute.rts;
023:
024:        import org.apache.derby.iapi.services.io.StoredFormatIds;
025:
026:        import org.apache.derby.iapi.services.i18n.MessageService;
027:        import org.apache.derby.iapi.reference.SQLState;
028:
029:        import org.apache.derby.iapi.services.io.FormatableHashtable;
030:        import org.apache.derby.iapi.services.io.FormatableProperties;
031:
032:        import java.io.ObjectOutput;
033:        import java.io.ObjectInput;
034:        import java.io.IOException;
035:
036:        import java.util.Enumeration;
037:        import java.util.Properties;
038:
039:        /**
040:         ResultSetStatistics implemenation for RealLastIndexKeyScanResultSet.
041:
042:         @author jamie
043:
044:         */
045:        public class RealLastIndexKeyScanStatistics extends
046:                RealNoPutResultSetStatistics {
047:
048:            /* Leave these fields public for object inspectors */
049:            public String isolationLevel;
050:            public String tableName;
051:            public String indexName;
052:            public String lockString;
053:
054:            // CONSTRUCTORS
055:
056:            /**
057:             * 
058:             *
059:             */
060:            public RealLastIndexKeyScanStatistics(int numOpens,
061:                    long constructorTime, long openTime, long nextTime,
062:                    long closeTime, int resultSetNumber, String tableName,
063:                    String indexName, String isolationLevel, String lockString,
064:                    double optimizerEstimatedRowCount,
065:                    double optimizerEstimatedCost) {
066:                super (numOpens, 1, 0, constructorTime, openTime, nextTime,
067:                        closeTime, resultSetNumber, optimizerEstimatedRowCount,
068:                        optimizerEstimatedCost);
069:                this .tableName = tableName;
070:                this .indexName = indexName;
071:                this .isolationLevel = isolationLevel;
072:                this .lockString = lockString;
073:            }
074:
075:            // ResultSetStatistics methods
076:
077:            /**
078:             * Return the statement execution plan as a String.
079:             *
080:             * @param depth	Indentation level.
081:             *
082:             * @return String	The statement executio plan as a String.
083:             */
084:            public String getStatementExecutionPlanText(int depth) {
085:                String header;
086:                String isolationString = null;
087:
088:                initFormatInfo(depth);
089:
090:                header = indent
091:                        + MessageService.getTextMessage(SQLState.RTS_LKIS_RS,
092:                                tableName, indexName);
093:
094:                header = header
095:                        + MessageService.getTextMessage(
096:                                SQLState.RTS_LOCKING_OPTIMIZER, isolationLevel,
097:                                lockString);
098:
099:                header = header + "\n";
100:
101:                return header
102:                        + indent
103:                        + MessageService.getTextMessage(SQLState.RTS_NUM_OPENS)
104:                        + " = "
105:                        + numOpens
106:                        + "\n"
107:                        + indent
108:                        + MessageService.getTextMessage(SQLState.RTS_ROWS_SEEN)
109:                        + " = "
110:                        + numOpens
111:                        + "\n"
112:                        + dumpTimeStats(indent, subIndent)
113:                        + "\n"
114:                        + ((rowsSeen > 0) ? subIndent
115:                                + MessageService
116:                                        .getTextMessage(SQLState.RTS_NEXT_TIME)
117:                                + " = " + (nextTime / numOpens) + "\n" : "")
118:                        + "\n" +
119:                        // RESOLVE - estimated row count and cost will eventually 
120:                        // be displayed for all nodes
121:                        dumpEstimatedCosts(subIndent);
122:            }
123:
124:            /**
125:             * Return information on the scan nodes from the statement execution 
126:             * plan as a String.
127:             *
128:             * @param depth	Indentation level.
129:             * @param tableName if not NULL then print information for this table only
130:             *
131:             * @return String	The information on the scan nodes from the 
132:             *					statement execution plan as a String.
133:             */
134:            public String getScanStatisticsText(String tableName, int depth) {
135:                if ((tableName == null) || (tableName.equals(this .tableName)))
136:                    return getStatementExecutionPlanText(depth);
137:                else
138:                    return (String) "";
139:            }
140:
141:            // Class implementation
142:
143:            public String toString() {
144:                return getStatementExecutionPlanText(0);
145:            }
146:
147:            /**
148:             * Format for display, a name for this node.
149:             *
150:             */
151:            public String getNodeName() {
152:                return MessageService
153:                        .getTextMessage(indexName == null ? SQLState.RTS_TABLE_SCAN
154:                                : SQLState.RTS_INDEX_SCAN);
155:            }
156:
157:            /**
158:             * If this node is on a database item (like a table or an index), then provide a
159:             * string that describes the on item.
160:             *
161:             */
162:            public String getNodeOn() {
163:                if (indexName == null)
164:                    return MessageService.getTextMessage(SQLState.RTS_ON,
165:                            tableName);
166:                else
167:                    return MessageService.getTextMessage(SQLState.RTS_ON_USING,
168:                            tableName, indexName);
169:            }
170:        }
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