Source Code Cross Referenced for Set.java in  » Database-DBMS » h2database » org » h2 » command » dml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » h2database » org.h2.command.dml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
003:         * (http://h2database.com/html/license.html).
004:         * Initial Developer: H2 Group
005:         */
006:        package org.h2.command.dml;
007:
008:        import java.sql.SQLException;
009:        import java.text.Collator;
010:
011:        import org.h2.command.Prepared;
012:        import org.h2.compress.Compressor;
013:        import org.h2.constant.ErrorCode;
014:        import org.h2.constant.SysProperties;
015:        import org.h2.engine.Database;
016:        import org.h2.engine.DbObject;
017:        import org.h2.engine.Mode;
018:        import org.h2.engine.Session;
019:        import org.h2.engine.Setting;
020:        import org.h2.expression.Expression;
021:        import org.h2.expression.ValueExpression;
022:        import org.h2.message.Message;
023:        import org.h2.result.LocalResult;
024:        import org.h2.schema.Schema;
025:        import org.h2.table.Table;
026:        import org.h2.tools.CompressTool;
027:        import org.h2.util.ObjectArray;
028:        import org.h2.util.StringUtils;
029:        import org.h2.value.CompareMode;
030:        import org.h2.value.ValueInt;
031:
032:        /**
033:         * This class represents the statement
034:         * SET
035:         */
036:        public class Set extends Prepared {
037:
038:            private int type;
039:            private Expression expression;
040:            private String stringValue;
041:            private String[] stringValueList;
042:
043:            public Set(Session session, int type) {
044:                super (session);
045:                this .type = type;
046:            }
047:
048:            public void setString(String v) {
049:                this .stringValue = v;
050:            }
051:
052:            public boolean isTransactional() {
053:                return false;
054:            }
055:
056:            public int update() throws SQLException {
057:                // Value v = expr.getValue();
058:                Database database = session.getDatabase();
059:                String name = SetTypes.getTypeName(type);
060:                switch (type) {
061:                case SetTypes.MAX_LOG_SIZE:
062:                    session.getUser().checkAdmin();
063:                    session.getDatabase().setMaxLogSize(
064:                            (long) getIntValue() * 1024 * 1024);
065:                    addOrUpdateSetting(name, null, getIntValue());
066:                    break;
067:                case SetTypes.LOCK_TIMEOUT:
068:                    session.setLockTimeout(getIntValue());
069:                    break;
070:                case SetTypes.LOCK_MODE:
071:                    session.getUser().checkAdmin();
072:                    database.setLockMode(getIntValue());
073:                    addOrUpdateSetting(name, null, getIntValue());
074:                    break;
075:                case SetTypes.DEFAULT_LOCK_TIMEOUT:
076:                    session.getUser().checkAdmin();
077:                    addOrUpdateSetting(name, null, getIntValue());
078:                    break;
079:                case SetTypes.DEFAULT_TABLE_TYPE:
080:                    session.getUser().checkAdmin();
081:                    addOrUpdateSetting(name, null, getIntValue());
082:                    break;
083:                case SetTypes.TRACE_LEVEL_SYSTEM_OUT:
084:                    session.getUser().checkAdmin();
085:                    database.getTraceSystem().setLevelSystemOut(getIntValue());
086:                    addOrUpdateSetting(name, null, getIntValue());
087:                    break;
088:                case SetTypes.TRACE_LEVEL_FILE:
089:                    session.getUser().checkAdmin();
090:                    database.getTraceSystem().setLevelFile(getIntValue());
091:                    addOrUpdateSetting(name, null, getIntValue());
092:                    break;
093:                case SetTypes.TRACE_MAX_FILE_SIZE: {
094:                    session.getUser().checkAdmin();
095:                    int size = getIntValue() * 1024 * 1024;
096:                    database.getTraceSystem().setMaxFileSize(size);
097:                    addOrUpdateSetting(name, null, getIntValue());
098:                    break;
099:                }
100:                case SetTypes.CACHE_SIZE:
101:                    session.getUser().checkAdmin();
102:                    database.setCacheSize(getIntValue());
103:                    addOrUpdateSetting(name, null, getIntValue());
104:                    break;
105:                case SetTypes.MODE:
106:                    session.getUser().checkAdmin();
107:                    Mode mode = Mode.getInstance(stringValue);
108:                    if (mode == null) {
109:                        throw Message.getSQLException(ErrorCode.UNKNOWN_MODE_1,
110:                                stringValue);
111:                    }
112:                    database.setMode(mode);
113:                    break;
114:                case SetTypes.COLLATION: {
115:                    session.getUser().checkAdmin();
116:                    ObjectArray array = database
117:                            .getAllSchemaObjects(DbObject.TABLE_OR_VIEW);
118:                    for (int i = 0; i < array.size(); i++) {
119:                        Table table = (Table) array.get(i);
120:                        if (table.getCreateSQL() != null) {
121:                            throw Message
122:                                    .getSQLException(
123:                                            ErrorCode.COLLATION_CHANGE_WITH_DATA_TABLE_1,
124:                                            table.getSQL());
125:                        }
126:                    }
127:                    CompareMode compareMode;
128:                    StringBuffer buff = new StringBuffer(stringValue);
129:                    if (stringValue.equals(CompareMode.OFF)) {
130:                        compareMode = new CompareMode(null, null, 0);
131:                    } else {
132:                        Collator coll = CompareMode.getCollator(stringValue);
133:                        compareMode = new CompareMode(coll, stringValue,
134:                                SysProperties.getCollatorCacheSize());
135:                        buff.append(" STRENGTH ");
136:                        if (getIntValue() == Collator.IDENTICAL) {
137:                            buff.append("IDENTICAL");
138:                        } else if (getIntValue() == Collator.PRIMARY) {
139:                            buff.append("PRIMARY");
140:                        } else if (getIntValue() == Collator.SECONDARY) {
141:                            buff.append("SECONDARY");
142:                        } else if (getIntValue() == Collator.TERTIARY) {
143:                            buff.append("TERTIARY");
144:                        }
145:                        coll.setStrength(getIntValue());
146:                    }
147:                    addOrUpdateSetting(name, buff.toString(), 0);
148:                    database.setCompareMode(compareMode);
149:                    break;
150:                }
151:                case SetTypes.IGNORECASE:
152:                    session.getUser().checkAdmin();
153:                    session.getDatabase().setIgnoreCase(getIntValue() == 1);
154:                    addOrUpdateSetting(name, null, getIntValue());
155:                    break;
156:                case SetTypes.CLUSTER: {
157:                    session.getUser().checkAdmin();
158:                    database
159:                            .setCluster(StringUtils.quoteStringSQL(stringValue));
160:                    addOrUpdateSetting(name, StringUtils
161:                            .quoteStringSQL(stringValue), 0);
162:                    break;
163:                }
164:                case SetTypes.WRITE_DELAY: {
165:                    session.getUser().checkAdmin();
166:                    database.setWriteDelay(getIntValue());
167:                    addOrUpdateSetting(name, null, getIntValue());
168:                    break;
169:                }
170:                case SetTypes.DATABASE_EVENT_LISTENER: {
171:                    session.getUser().checkAdmin();
172:                    database.setEventListener(stringValue);
173:                    break;
174:                }
175:                case SetTypes.MAX_MEMORY_ROWS: {
176:                    session.getUser().checkAdmin();
177:                    database.setMaxMemoryRows(getIntValue());
178:                    addOrUpdateSetting(name, null, getIntValue());
179:                    break;
180:                }
181:                case SetTypes.MULTI_THREADED: {
182:                    session.getUser().checkAdmin();
183:                    database.setMultiThreaded(getIntValue() == 1);
184:                    break;
185:                }
186:                case SetTypes.DB_CLOSE_DELAY: {
187:                    session.getUser().checkAdmin();
188:                    database.setCloseDelay(getIntValue());
189:                    addOrUpdateSetting(name, null, getIntValue());
190:                    break;
191:                }
192:                case SetTypes.LOG: {
193:                    int value = getIntValue();
194:                    if (value < 0 || value > 2) {
195:                        throw Message.getInvalidValueException(""
196:                                + getIntValue(), "LOG");
197:                    }
198:                    if (value == 0) {
199:                        session.getUser().checkAdmin();
200:                    }
201:                    database.setLog(value);
202:                    break;
203:                }
204:                case SetTypes.THROTTLE: {
205:                    if (getIntValue() < 0) {
206:                        throw Message.getInvalidValueException(""
207:                                + getIntValue(), "THROTTLE");
208:                    }
209:                    session.setThrottle(getIntValue());
210:                    break;
211:                }
212:                case SetTypes.MAX_MEMORY_UNDO: {
213:                    if (getIntValue() < 0) {
214:                        throw Message.getInvalidValueException(""
215:                                + getIntValue(), "MAX_MEMORY_UNDO");
216:                    }
217:                    session.getUser().checkAdmin();
218:                    database.setMaxMemoryUndo(getIntValue());
219:                    addOrUpdateSetting(name, null, getIntValue());
220:                    break;
221:                }
222:                case SetTypes.MAX_LENGTH_INPLACE_LOB: {
223:                    if (getIntValue() < 0) {
224:                        throw Message.getInvalidValueException(""
225:                                + getIntValue(), "MAX_LENGTH_INPLACE_LOB");
226:                    }
227:                    session.getUser().checkAdmin();
228:                    database.setMaxLengthInplaceLob(getIntValue());
229:                    addOrUpdateSetting(name, null, getIntValue());
230:                    break;
231:                }
232:                case SetTypes.COMPRESS_LOB: {
233:                    session.getUser().checkAdmin();
234:                    int algo = CompressTool.getInstance().getCompressAlgorithm(
235:                            stringValue);
236:                    database
237:                            .setLobCompressionAlgorithm(algo == Compressor.NO ? null
238:                                    : stringValue);
239:                    addOrUpdateSetting(name, stringValue, 0);
240:                    break;
241:                }
242:                case SetTypes.ALLOW_LITERALS: {
243:                    session.getUser().checkAdmin();
244:                    int value = getIntValue();
245:                    if (value < 0 || value > 2) {
246:                        throw Message.getInvalidValueException(""
247:                                + getIntValue(), "ALLOW_LITERALS");
248:                    }
249:                    database.setAllowLiterals(value);
250:                    addOrUpdateSetting(name, null, value);
251:                    break;
252:                }
253:                case SetTypes.SCHEMA: {
254:                    Schema schema = database.getSchema(stringValue);
255:                    session.setCurrentSchema(schema);
256:                    break;
257:                }
258:                case SetTypes.OPTIMIZE_REUSE_RESULTS: {
259:                    session.getUser().checkAdmin();
260:                    database.setOptimizeReuseResults(getIntValue() != 0);
261:                    break;
262:                }
263:                case SetTypes.SCHEMA_SEARCH_PATH: {
264:                    session.setSchemaSearchPath(stringValueList);
265:                    break;
266:                }
267:                case SetTypes.UNDO_LOG: {
268:                    int value = getIntValue();
269:                    if (value < 0 || value > 1) {
270:                        throw Message.getInvalidValueException(""
271:                                + getIntValue(), "UNDO_LOG");
272:                    }
273:                    session.setUndoLogEnabled(value == 1);
274:                    break;
275:                }
276:                case SetTypes.REFERENTIAL_INTEGRITY: {
277:                    session.getUser().checkAdmin();
278:                    int value = getIntValue();
279:                    if (value < 0 || value > 1) {
280:                        throw Message.getInvalidValueException(""
281:                                + getIntValue(), "REFERENTIAL_INTEGRITY");
282:                    }
283:                    database.setReferentialIntegrity(value == 1);
284:                    break;
285:                }
286:                case SetTypes.MVCC: {
287:                    if (database.isMultiVersion() != (getIntValue() == 1)) {
288:                        throw Message.getSQLException(
289:                                ErrorCode.CANNOT_CHANGE_SETTING_WHEN_OPEN_1,
290:                                "MVCC");
291:                    }
292:                    break;
293:                }
294:                case SetTypes.MAX_OPERATION_MEMORY: {
295:                    session.getUser().checkAdmin();
296:                    int value = getIntValue();
297:                    database.setMaxOperationMemory(value);
298:                    break;
299:                }
300:                case SetTypes.EXCLUSIVE: {
301:                    session.getUser().checkAdmin();
302:                    int value = getIntValue();
303:                    database.setExclusiveSession(value == 1 ? session : null);
304:                    break;
305:                }
306:                case SetTypes.CREATE_BUILD: {
307:                    session.getUser().checkAdmin();
308:                    if (database.isStarting()) {
309:                        // just ignore the command if not starting
310:                        // this avoids problems when running recovery scripts
311:                        int value = getIntValue();
312:                        addOrUpdateSetting(name, null, value);
313:                    }
314:                    break;
315:                }
316:                case SetTypes.VARIABLE: {
317:                    Expression expr = expression.optimize(session);
318:                    session.setVariable(stringValue, expr.getValue(session));
319:                    break;
320:                }
321:                case SetTypes.QUERY_TIMEOUT: {
322:                    int value = getIntValue();
323:                    session.setQueryTimeout(value);
324:                    break;
325:                }
326:                default:
327:                    throw Message.getInternalError("type=" + type);
328:                }
329:                // the meta data information has changed
330:                database.getNextModificationDataId();
331:                return 0;
332:            }
333:
334:            private int getIntValue() throws SQLException {
335:                expression = expression.optimize(session);
336:                return expression.getValue(session).getInt();
337:            }
338:
339:            public void setInt(int value) {
340:                this .expression = ValueExpression.get(ValueInt.get(value));
341:            }
342:
343:            public void setExpression(Expression expression) {
344:                this .expression = expression;
345:            }
346:
347:            private void addOrUpdateSetting(String name, String s, int v)
348:                    throws SQLException {
349:                Database database = session.getDatabase();
350:                if (database.getReadOnly()) {
351:                    return;
352:                }
353:                Setting setting = database.findSetting(name);
354:                boolean addNew = false;
355:                if (setting == null) {
356:                    addNew = true;
357:                    int id = getObjectId(false, true);
358:                    setting = new Setting(database, id, name);
359:                }
360:                if (s != null) {
361:                    if (!addNew && setting.getStringValue().equals(s)) {
362:                        return;
363:                    }
364:                    setting.setStringValue(s);
365:                } else {
366:                    if (!addNew && setting.getIntValue() == v) {
367:                        return;
368:                    }
369:                    setting.setIntValue(v);
370:                }
371:                if (addNew) {
372:                    database.addDatabaseObject(session, setting);
373:                } else {
374:                    database.update(session, setting);
375:                }
376:            }
377:
378:            public boolean needRecompile() {
379:                return false;
380:            }
381:
382:            public LocalResult queryMeta() {
383:                return null;
384:            }
385:
386:            public void setStringArray(String[] list) {
387:                this.stringValueList = list;
388:            }
389:
390:        }
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