Source Code Cross Referenced for CreateRequest.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » controller » requests » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.controller.requests 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Sequoia: Database clustering technology.
003:         * Copyright (C) 2002-2004 French National Institute For Research In Computer
004:         * Science And Control (INRIA).
005:         * Copyright (C) 2005 AmicoSoft, Inc. dba Emic Networks
006:         * Contact: sequoia@continuent.org
007:         * 
008:         * Licensed under the Apache License, Version 2.0 (the "License");
009:         * you may not use this file except in compliance with the License.
010:         * 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:         * Initial developer(s): Julie Marguerite.
021:         * Contributor(s): Mathieu Peltier, Emmanuel Cecchet.
022:         */package org.continuent.sequoia.controller.requests;
023:
024:        import java.io.Serializable;
025:        import java.sql.SQLException;
026:        import java.util.ArrayList;
027:        import java.util.Collection;
028:        import java.util.StringTokenizer;
029:        import java.util.regex.Matcher;
030:        import java.util.regex.Pattern;
031:
032:        import org.continuent.sequoia.common.i18n.Translate;
033:        import org.continuent.sequoia.common.sql.schema.DatabaseColumn;
034:        import org.continuent.sequoia.common.sql.schema.DatabaseSchema;
035:        import org.continuent.sequoia.common.sql.schema.DatabaseTable;
036:        import org.continuent.sequoia.common.sql.schema.TableColumn;
037:
038:        /**
039:         * A <code>CreateRequest</code> is a SQL request of the following syntax:
040:         * 
041:         * <pre>
042:         *  CREATE [TEMPORARY] TABLE table-name [(column-name column-type [,column-name colum-type]* [,table-constraint-definition]*)]
043:         * </pre>
044:         * 
045:         * We now also support SELECT INTO statements.
046:         * 
047:         * @author <a href="mailto:Julie.Marguerite@inria.fr">Julie Marguerite </a>
048:         * @author <a href="mailto:Mathieu.Peltier@inrialpes.fr">Mathieu Peltier </a>
049:         * @author <a href="mailto:Emmanuel.Cecchet@inria.fr">Emmanuel Cecchet </a>
050:         * @version 1.0
051:         */
052:        public class CreateRequest extends AbstractWriteRequest implements 
053:                Serializable {
054:            private static final long serialVersionUID = -8810498358284503952L;
055:
056:            /** The table to create. */
057:            protected transient DatabaseTable table = null;
058:
059:            /**
060:             * List of tables used to fill the created table in case of create query
061:             * containing a select.
062:             */
063:            protected transient Collection fromTables = null;
064:
065:            // Be conservative, if we cannot parse the query, assumes it invalidates
066:            // everything
067:            protected boolean altersDatabaseCatalog = true;
068:            protected boolean altersDatabaseSchema = true;
069:            protected boolean altersSomething = true;
070:            protected boolean altersStoredProcedureList = true;
071:            protected boolean altersUserDefinedTypes = true;
072:            protected boolean altersUsers = true;
073:
074:            protected boolean altersAggregateList = false;
075:            protected boolean altersMetadataCache = false;
076:            protected boolean altersQueryResultCache = false;
077:
078:            protected boolean createsTemporaryTable = false;
079:
080:            /**
081:             * Creates a new <code>CreateRequest</code> instance. The caller must give
082:             * an SQL request, without any leading or trailing spaces and beginning with
083:             * 'create table ' (it will not be checked).
084:             * <p>
085:             * The request is not parsed but it can be done later by a call to
086:             * {@link #parse(DatabaseSchema, int, boolean)}.
087:             * 
088:             * @param sqlQuery the SQL request
089:             * @param escapeProcessing should the driver to escape processing before
090:             *          sending to the database ?
091:             * @param timeout an <code>int</code> value
092:             * @param lineSeparator the line separator used in the query
093:             * @see #parse
094:             */
095:            public CreateRequest(String sqlQuery, boolean escapeProcessing,
096:                    int timeout, String lineSeparator) {
097:                super (sqlQuery, escapeProcessing, timeout, lineSeparator,
098:                        RequestType.CREATE);
099:                setMacrosAreProcessed(true); // no macro processing needed
100:            }
101:
102:            /**
103:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersAggregateList()
104:             */
105:            public boolean altersAggregateList() {
106:                return altersAggregateList;
107:            }
108:
109:            /**
110:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersDatabaseCatalog()
111:             */
112:            public boolean altersDatabaseCatalog() {
113:                return altersDatabaseCatalog;
114:            }
115:
116:            /**
117:             * Returns true if this create request alters the current database schema
118:             * (using create table, create schema, create view) and false otherwise
119:             * (create database, create index, create function, create method, create
120:             * procedure, create role, create trigger, create type).
121:             * 
122:             * @return Returns true if this query alters the database schema.
123:             */
124:            public boolean altersDatabaseSchema() {
125:                return altersDatabaseSchema;
126:            }
127:
128:            /**
129:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersMetadataCache()
130:             */
131:            public boolean altersMetadataCache() {
132:                return altersMetadataCache;
133:            }
134:
135:            /**
136:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersQueryResultCache()
137:             */
138:            public boolean altersQueryResultCache() {
139:                return altersQueryResultCache;
140:            }
141:
142:            /**
143:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersSomething()
144:             */
145:            public boolean altersSomething() {
146:                return altersSomething;
147:            }
148:
149:            /**
150:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersStoredProcedureList()
151:             */
152:            public boolean altersStoredProcedureList() {
153:                return altersStoredProcedureList;
154:            }
155:
156:            /**
157:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersUserDefinedTypes()
158:             */
159:            public boolean altersUserDefinedTypes() {
160:                return altersUserDefinedTypes;
161:            }
162:
163:            /**
164:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#altersUsers()
165:             */
166:            public boolean altersUsers() {
167:                return altersUsers;
168:            }
169:
170:            /**
171:             * @see AbstractRequest#cloneParsing(AbstractRequest)
172:             */
173:            public void cloneParsing(AbstractRequest request) {
174:                if (!request.isParsed())
175:                    return;
176:                CreateRequest createRequest = (CreateRequest) request;
177:                cloneTableNameAndColumns((AbstractWriteRequest) request);
178:                table = createRequest.getDatabaseTable();
179:                fromTables = createRequest.getFromTables();
180:                isParsed = true;
181:            }
182:
183:            /**
184:             * Gets the database table created by this statement (in case of a CREATE
185:             * TABLE statement).
186:             * 
187:             * @return a <code>DatabaseTable</code> value
188:             */
189:            public DatabaseTable getDatabaseTable() {
190:                return table;
191:            }
192:
193:            /**
194:             * Returns the list of tables used to fill the created table in case of create
195:             * query containing a select.
196:             * 
197:             * @return <code>Collection</code> of tables
198:             */
199:            public Collection getFromTables() {
200:                return fromTables;
201:            }
202:
203:            /**
204:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#needsMacroProcessing()
205:             */
206:            public boolean needsMacroProcessing() {
207:                return false;
208:            }
209:
210:            /**
211:             * Pattern for SELECT INTO statement. This permits to extract from the
212:             * statement the name of the table.
213:             */
214:            private static final String CREATE_TABLE_SELECT_INTO = "^select.*into\\s+((temporary|temp)\\s+)?(table\\s+)?([^(\\s|\\()]+)(.*)?";
215:            private static final Pattern CREATE_TABLE_SELECT_INTO_STATEMENT_PATTERN = Pattern
216:                    .compile(CREATE_TABLE_SELECT_INTO, Pattern.CASE_INSENSITIVE
217:                            | Pattern.DOTALL);
218:
219:            /**
220:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#parse(org.continuent.sequoia.common.sql.schema.DatabaseSchema,
221:             *      int, boolean)
222:             */
223:            public void parse(DatabaseSchema schema, int granularity,
224:                    boolean isCaseSensitive) throws SQLException {
225:                if (granularity == ParsingGranularities.NO_PARSING) {
226:                    isParsed = true;
227:                    return;
228:                }
229:
230:                String originalSQL = this .trimCarriageReturnAndTabs();
231:                String sql = originalSQL.toLowerCase();
232:
233:                Matcher matcher = CREATE_TABLE_SELECT_INTO_STATEMENT_PATTERN
234:                        .matcher(sql);
235:                if (matcher.matches()) {
236:                    // INSERT... INTO
237:                    table = new DatabaseTable(matcher.group(4));
238:
239:                    altersDatabaseCatalog = false;
240:                    altersDatabaseSchema = true;
241:                    altersStoredProcedureList = false;
242:                    altersUserDefinedTypes = false;
243:                    altersUsers = false;
244:                    isParsed = true;
245:                    return;
246:                }
247:
248:                // Strip create
249:                sql = sql.substring("create".length()).trim();
250:
251:                // Check what kind of create we are facing
252:                if (sql.startsWith("database")) { // CREATE DATABASE alters only the database catalog
253:                    altersDatabaseCatalog = true;
254:                    altersDatabaseSchema = false;
255:                    altersStoredProcedureList = false;
256:                    altersUserDefinedTypes = false;
257:                    altersUsers = false;
258:                    return;
259:                }
260:                if (sql.startsWith("index") || sql.startsWith("unique")
261:                        || sql.startsWith("role") || sql.startsWith("sequence")) { // Does not alter anything :
262:                    // CREATE [UNIQUE] INDEX
263:                    // CREATE ROLE
264:                    // CREATE SEQUENCE
265:                    altersSomething = false;
266:                    return;
267:                }
268:                if (sql.startsWith("function") || sql.startsWith("method")
269:                        || sql.startsWith("procedure")
270:                        || sql.startsWith("trigger") || sql.startsWith("type")) { // CREATE FUNCTION, CREATE METHOD, CREATE PROCEDURE, CREATE TRIGGER and
271:                    // CREATE TYPE only alters definitions
272:                    altersDatabaseCatalog = false;
273:                    altersDatabaseSchema = false;
274:                    altersStoredProcedureList = true;
275:                    altersUserDefinedTypes = true;
276:                    altersUsers = false;
277:                    return;
278:                }
279:
280:                // From this point on, only the schema is affected
281:                altersDatabaseCatalog = false;
282:                altersDatabaseSchema = true;
283:                altersStoredProcedureList = false;
284:                altersUserDefinedTypes = false;
285:                altersUsers = false;
286:                if (sql.startsWith("schema") || sql.startsWith("view"))
287:                    // No parsing to do
288:                    return;
289:
290:                // Let's try to check if we have a 'create [temporary] table '
291:                int tableIdx = sql.indexOf("table");
292:                if (tableIdx < 0)
293:                    throw new SQLException("Unsupported CREATE statement: '"
294:                            + sqlQueryOrTemplate + "'");
295:
296:                //
297:                // Starting from here, everything is just to handle CREATE TABLE statements
298:                //
299:
300:                // Strip up to 'table'
301:                sql = sql.substring(tableIdx + 5).trim();
302:
303:                // Does the query contain a select?
304:                int selectIdx = sql.indexOf("select");
305:                if (selectIdx != -1 && sql.charAt(selectIdx + 6) != ' ')
306:                    selectIdx = -1;
307:
308:                if (isCaseSensitive) // Reverse to the original case
309:                    sql = originalSQL.substring(originalSQL.length()
310:                            - sql.length());
311:
312:                if (selectIdx != -1) {
313:                    // Get the table on which CREATE occurs
314:                    int nextSpaceIdx = sql.indexOf(" ");
315:                    tableName = sql.substring(0, nextSpaceIdx).trim();
316:                    table = new DatabaseTable(tableName);
317:                    // Parse the select
318:                    sql = sql.substring(selectIdx).trim();
319:                    SelectRequest select = new SelectRequest(sql, false, 60,
320:                            getLineSeparator());
321:                    select.parse(schema, granularity, isCaseSensitive);
322:                    fromTables = select.getFrom();
323:                    if (granularity > ParsingGranularities.TABLE) { // Update the columns and add them to the table
324:                        columns = select.getSelect();
325:                        int size = columns.size();
326:                        for (int i = 0; i < size; i++) {
327:                            TableColumn tc = (TableColumn) columns.get(i);
328:                            table.addColumn(new DatabaseColumn(tc
329:                                    .getColumnName(), false));
330:                        }
331:                    }
332:                } else {
333:                    // Get the table on which CREATE occurs
334:                    // Look for the parenthesis
335:                    int openParenthesisIdx = sql.indexOf("(");
336:                    int closeParenthesisIdx = sql.lastIndexOf(")");
337:                    if ((openParenthesisIdx == -1)
338:                            && (closeParenthesisIdx == -1)) {
339:                        // no parenthesis found
340:                        table = new DatabaseTable(sql.trim());
341:                        if (granularity > ParsingGranularities.TABLE)
342:                            columns = new ArrayList();
343:                        isParsed = true;
344:                        return;
345:                    } else if ((openParenthesisIdx == -1)
346:                            || (closeParenthesisIdx == -1)
347:                            || (openParenthesisIdx > closeParenthesisIdx)) {
348:                        throw new SQLException(
349:                                "Syntax error in this CREATE statement: '"
350:                                        + sqlQueryOrTemplate + "'");
351:                    } else {
352:                        tableName = sql.substring(0, openParenthesisIdx).trim();
353:                    }
354:                    table = new DatabaseTable(tableName);
355:
356:                    // Get the column names
357:                    if (granularity > ParsingGranularities.TABLE) {
358:                        columns = new ArrayList();
359:                        sql = sql.substring(openParenthesisIdx + 1,
360:                                closeParenthesisIdx).trim();
361:                        StringTokenizer columnTokens = new StringTokenizer(sql,
362:                                ",");
363:                        String word;
364:                        String lowercaseWord;
365:                        StringTokenizer wordTokens = null;
366:                        String token;
367:                        DatabaseColumn col = null;
368:
369:                        while (columnTokens.hasMoreTokens()) {
370:                            token = columnTokens.nextToken().trim();
371:
372:                            // work around to prevent bug: if the request contains for example:
373:                            // INDEX foo (col1,col2)
374:                            // we have to merge the 2 tokens: 'INDEX foo (col1' and 'col2)'
375:                            if ((token.indexOf("(") != -1)
376:                                    && (token.indexOf(")") == -1)) {
377:                                if (columnTokens.hasMoreTokens())
378:                                    token = token + ","
379:                                            + columnTokens.nextToken().trim();
380:                                else {
381:                                    tableName = null;
382:                                    columns = null;
383:                                    throw new SQLException(
384:                                            "Syntax error in this CREATE statement: '"
385:                                                    + sqlQueryOrTemplate + "'");
386:                                }
387:                            }
388:
389:                            // First word of the line: either a column name or
390:                            // a table constraint definition
391:                            wordTokens = new StringTokenizer(token, " ");
392:                            word = wordTokens.nextToken().trim();
393:                            lowercaseWord = word.toLowerCase();
394:
395:                            // If it's a constraint, index or check keyword do not do anything
396:                            // else parse the line
397:                            if (!lowercaseWord.equals("constraint")
398:                                    && !lowercaseWord.equals("index")
399:                                    && !lowercaseWord.equals("check")) {
400:                                String columnName;
401:                                boolean isUnique = false;
402:                                // Check for primary key or unique constraint
403:                                if (lowercaseWord.equals("primary")
404:                                        || lowercaseWord.startsWith("unique")) {
405:
406:                                    // Get the name of the column
407:                                    openParenthesisIdx = token.indexOf("(");
408:                                    closeParenthesisIdx = token.indexOf(")");
409:                                    if ((openParenthesisIdx == -1)
410:                                            || (closeParenthesisIdx == -1)
411:                                            || (openParenthesisIdx > closeParenthesisIdx)) {
412:                                        tableName = null;
413:                                        columns = null;
414:                                        throw new SQLException(
415:                                                "Syntax error in this CREATE statement: '"
416:                                                        + sqlQueryOrTemplate
417:                                                        + "'");
418:                                    }
419:
420:                                    columnName = token.substring(
421:                                            openParenthesisIdx + 1,
422:                                            closeParenthesisIdx).trim();
423:
424:                                    int comma;
425:                                    while ((comma = columnName.indexOf(',')) != -1) {
426:                                        String col1 = columnName.substring(0,
427:                                                comma).trim();
428:                                        col = table.getColumn(col1);
429:                                        if (col == null) {
430:                                            tableName = null;
431:                                            columns = null;
432:                                            throw new SQLException(
433:                                                    "Syntax error in this CREATE statement: '"
434:                                                            + sqlQueryOrTemplate
435:                                                            + "'");
436:                                        } else
437:                                            col.setIsUnique(true);
438:                                        columnName = columnName
439:                                                .substring(comma + 1);
440:                                    }
441:
442:                                    // Set this column to unique
443:                                    col = table.getColumn(columnName);
444:
445:                                    // Test first if dbTable contains this column. This can fail with
446:                                    // some invalid request, for example:
447:                                    // CREATE TABLE categories(id INT4, name TEXT, PRIMARY KEY((id))
448:                                    if (col == null) {
449:                                        tableName = null;
450:                                        columns = null;
451:                                        throw new SQLException(
452:                                                "Syntax error in this CREATE statement: '"
453:                                                        + sqlQueryOrTemplate
454:                                                        + "'");
455:                                    } else
456:                                        col.setIsUnique(true);
457:                                } else {
458:                                    // It's a column name
459:                                    columnName = word;
460:
461:                                    if (!wordTokens.hasMoreTokens()) {
462:                                        // at least type declaration is required
463:                                        tableName = null;
464:                                        columns = null;
465:                                        throw new SQLException(
466:                                                "Syntax error in this CREATE statement: '"
467:                                                        + sqlQueryOrTemplate
468:                                                        + "'");
469:                                    }
470:
471:                                    // Check for primary key or unique constraints
472:                                    do {
473:                                        word = wordTokens.nextToken().trim()
474:                                                .toLowerCase();
475:                                        if (word.equals("primary")
476:                                                || word.startsWith("unique")) {
477:                                            // Create the column as unique
478:                                            isUnique = true;
479:                                            break;
480:                                        }
481:                                    } while (wordTokens.hasMoreTokens());
482:
483:                                    // Add the column to the parsed columns list and
484:                                    // to the create DatabaseTable
485:                                    columns.add(new TableColumn(tableName,
486:                                            columnName));
487:                                    table.addColumn(new DatabaseColumn(
488:                                            columnName, isUnique));
489:                                }
490:                            }
491:                        }
492:                    }
493:                }
494:                isParsed = true;
495:            }
496:
497:            /**
498:             * Does this request returns a ResultSet?
499:             * 
500:             * @return false
501:             */
502:            public boolean returnsResultSet() {
503:                return false;
504:            }
505:
506:            /**
507:             * @see org.continuent.sequoia.controller.requests.AbstractRequest#getParsingResultsAsString()
508:             */
509:            public String getParsingResultsAsString() {
510:                StringBuffer sb = new StringBuffer(super 
511:                        .getParsingResultsAsString());
512:                sb.append(Translate.get("request.create.table", table));
513:                if (fromTables != null) {
514:                    sb.append(Translate.get("request.create.from.tables"));
515:                    for (int i = 0; i < fromTables.size(); i++)
516:                        sb.append(Translate.get("request.create.from.table",
517:                                fromTables.toArray()[i]));
518:                }
519:                sb.append(Translate.get("request.alters", new String[] {
520:                        String.valueOf(altersAggregateList()),
521:                        String.valueOf(altersDatabaseCatalog()),
522:                        String.valueOf(altersDatabaseSchema()),
523:                        String.valueOf(altersMetadataCache()),
524:                        String.valueOf(altersQueryResultCache()),
525:                        String.valueOf(altersSomething()),
526:                        String.valueOf(altersStoredProcedureList()),
527:                        String.valueOf(altersUserDefinedTypes()),
528:                        String.valueOf(altersUsers()) }));
529:                return sb.toString();
530:            }
531:
532:            /**
533:             * Displays some debugging information about this request.
534:             */
535:            public void debug() {
536:                super .debug();
537:                if (tableName != null)
538:                    System.out.println("Created table: " + tableName);
539:                else
540:                    System.out.println("No information about created table");
541:
542:                if (columns != null) {
543:                    System.out.println("Created columns:");
544:                    for (int i = 0; i < columns.size(); i++)
545:                        System.out.println("  "
546:                                + ((TableColumn) columns.get(i))
547:                                        .getColumnName());
548:                } else
549:                    System.out.println("No information about created columns");
550:
551:                System.out.println();
552:            }
553:
554:            public boolean createsTemporaryTable() {
555:                return createsTemporaryTable;
556:            }
557:
558:        }
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