Package org.h2.engine

Examples of org.h2.engine.Database

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    ResultDiskBuffer(Session session, SortOrder sort, int columnCount) {
        this.parent = null;
        this.sort = sort;
        this.columnCount = columnCount;
        Database db = session.getDatabase();
        rowBuff = Data.create(db, Constants.DEFAULT_PAGE_SIZE);
        String fileName = db.createTempFile();
        file = db.openFile(fileName, "rw", false);
        file.setCheckedWriting(false);
        file.seek(FileStore.HEADER_LENGTH);
        if (sort != null) {
            tapes = New.arrayList();
            mainTape = null;
        } else {
            tapes = null;
            mainTape = new ResultDiskTape();
            mainTape.pos = FileStore.HEADER_LENGTH;
        }
        this.maxBufferSize = db.getSettings().largeResultBufferSize;
    }
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    private boolean checkIndex(Session session, String value, Value indexFrom, Value indexTo) {
        if (value == null || (indexFrom == null && indexTo == null)) {
            return true;
        }
        Database db = session.getDatabase();
        if (database.getMode().lowerCaseIdentifiers) {
            Value v = ValueStringIgnoreCase.get(value);
            if (indexFrom.equals(indexTo) && db.compare(v, indexFrom) != 0) {
                return false;
            }
        } else {
            Value v = ValueString.get(value);
            if (indexFrom != null && db.compare(v, indexFrom) < 0) {
                return false;
            }
            if (indexTo != null && db.compare(v, indexTo) > 0) {
                return false;
            }
        }
        return true;
    }
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        if (distinct) {
            if (distinctRows != null) {
                ValueArray array = ValueArray.get(values);
                distinctRows.put(array, values);
                rowCount = distinctRows.size();
                Database db = session.getDatabase();
                if (rowCount > db.getSettings().maxMemoryRowsDistinct && db.isPersistent() && !db.isReadOnly()) {
                    external = new ResultTempTable(session, sort);
                    rowCount = external.addRows(distinctRows.values());
                    distinctRows = null;
                }
            } else {
                rowCount = external.addRow(values);
            }
            return;
        }
        rows.add(values);
        rowCount++;
        if (rows.size() > maxMemoryRows && session.getDatabase().isPersistent()) {
            if (external == null) {
                if (randomAccess) {
                    Database db = session.getDatabase();
                    if (!db.isReadOnly()) {
                        external = new ResultTempTable(session, sort);
                    }
                } else {
                    external = new ResultDiskBuffer(session, sort, values.length);
                }
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                        if (list == null) {
                            break;
                        }
                        if (external == null) {
                            if (randomAccess) {
                                Database db = session.getDatabase();
                                if (!db.isReadOnly()) {
                                    external = new ResultTempTable(session, sort);
                                }
                            } else {
                                external = new ResultDiskBuffer(session, sort, list.length);
                            }
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        }
    }

    public void run() {
        while (!stop) {
            Database database = databaseRef.get();
            if (database == null) {
                break;
            }
            int wait = writeDelay;
            try {
                if (database.isFileLockSerialized()) {
                    wait = Constants.MIN_WRITE_DELAY;
                    database.checkpointIfRequired();
                } else {
                    database.flush();
                }
            } catch (Exception e) {
                TraceSystem traceSystem = database.getTraceSystem();
                if (traceSystem != null) {
                    traceSystem.getTrace(Trace.DATABASE).error(e, "flush");
                }
            }
            // TODO log writer: could also flush the dirty cache
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        if (table == null) {
            return;
        }
        try {
            table.truncate(session);
            Database database = session.getDatabase();
            synchronized (database) {
                Session sysSession = database.getSystemSession();
                if (!database.isSysTableLocked()) {
                    // this session may not lock the sys table (except if it already has locked it)
                    // because it must be committed immediately
                    // otherwise other threads can not access the sys table.
                    // if the table is not removed now, it will be when the database
                    // is opened the next time
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            // avoid using the Engine class to avoid deadlocks
            Properties p = new Properties();
            p.setProperty("user", "");
            p.setProperty("password", "");
            ConnectionInfo ci = new ConnectionInfo("jdbc:h2:" + testDatabase + ";FILE_LOCK=NO;TRACE_LEVEL_FILE=0", p);
            Database database = new Database(ci, null);
            // close the database
            Session session = database.getSystemSession();
            session.prepare("script to '" + testDatabase + ".sql'").query(0);
            session.prepare("shutdown immediately").update();
            database.removeSession(null);
            // everything OK - return
            return;
        } catch (DbException e) {
            SQLException e2 = DbException.toSQLException(e);
            int errorCode = e2.getErrorCode();
            if (errorCode == ErrorCode.WRONG_USER_OR_PASSWORD) {
                return;
            } else if (errorCode == ErrorCode.FILE_ENCRYPTION_ERROR_1) {
                return;
            }
            e.printStackTrace(System.out);
        } catch (Exception e) {
            // failed
            int errorCode = 0;
            if (e instanceof SQLException) {
                errorCode = ((SQLException) e).getErrorCode();
            }
            if (errorCode == ErrorCode.WRONG_USER_OR_PASSWORD) {
                return;
            } else if (errorCode == ErrorCode.FILE_ENCRYPTION_ERROR_1) {
                return;
            }
            e.printStackTrace(System.out);
        }
        out.println("begin ------------------------------ " + writeCount);
        try {
            Recover.execute(fileName.substring(0, fileName.lastIndexOf('/')), null);
        } catch (SQLException e) {
            // ignore
        }
        testDatabase += "X";
        try {
            FileUtils.copy(fileName, testDatabase + Constants.SUFFIX_PAGE_FILE);
            // avoid using the Engine class to avoid deadlocks
            Properties p = new Properties();
            ConnectionInfo ci = new ConnectionInfo("jdbc:h2:" + testDatabase + ";FILE_LOCK=NO", p);
            Database database = new Database(ci, null);
            // close the database
            database.removeSession(null);
        } catch (Exception e) {
            int errorCode = 0;
            if (e instanceof DbException) {
                e = ((DbException) e).getSQLException();
                errorCode = ((SQLException) e).getErrorCode();
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        }
    }

    private void writeAllRows() {
        if (file == null) {
            Database db = session.getDatabase();
            String fileName = db.createTempFile();
            file = db.openFile(fileName, "rw", false);
            file.setCheckedWriting(false);
            file.seek(FileStore.HEADER_LENGTH);
            rowBuff = Data.create(db, Constants.DEFAULT_PAGE_SIZE);
            file.seek(FileStore.HEADER_LENGTH);
        }
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    }

    public int update() {
        session.commit(true);
        session.getUser().checkAdmin();
        Database db = session.getDatabase();
        if (getSchema().findFunction(aliasName) != null) {
            if (!ifNotExists) {
                throw DbException.get(ErrorCode.FUNCTION_ALIAS_ALREADY_EXISTS_1, aliasName);
            }
        } else {
            int id = getObjectId();
            FunctionAlias functionAlias;
            if (javaClassMethod != null) {
                functionAlias = FunctionAlias.newInstance(getSchema(), id, aliasName, javaClassMethod, force);
            } else {
                functionAlias = FunctionAlias.newInstanceFromSource(getSchema(), id, aliasName, source, force);
            }
            functionAlias.setDeterministic(deterministic);
            db.addSchemaObject(session, functionAlias);
        }
        return 0;
    }
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    }

    public int update() {
        session.getUser().checkAdmin();
        session.commit(true);
        Database db = session.getDatabase();
        UserDataType type = db.findUserDataType(typeName);
        if (type == null) {
            if (!ifExists) {
                throw DbException.get(ErrorCode.USER_DATA_TYPE_NOT_FOUND_1, typeName);
            }
        } else {
            db.removeDatabaseObject(session, type);
        }
        return 0;
    }
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