Package org.lealone.engine

Examples of org.lealone.engine.Database

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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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                } else if (!(lc && l2c) && r.equals(r2)) {
                    return new Comparison(session, EQUAL, left, other.left);
                }
            } else {
                // a=b OR a=c
                Database db = session.getDatabase();
                if (rc && r2c && l.equals(l2)) {
                    return new ConditionIn(db, left, New.arrayList(Arrays.asList(right, other.right)));
                } else if (rc && l2c && l.equals(r2)) {
                    return new ConditionIn(db, left, New.arrayList(Arrays.asList(right, other.left)));
                } else if (lc && r2c && r.equals(l2)) {
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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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        }
    }

    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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    private int childCount;

    ResultTempTable(Session session, SortOrder sort) {
        this.session = session;
        this.sort = sort;
        Database db = session.getDatabase();
        Schema schema = db.getSchema(Constants.SCHEMA_MAIN);
        Column column = new Column(COLUMN_NAME, Value.ARRAY);
        column.setNullable(false);
        CreateTableData data = new CreateTableData();
        data.columns.add(column);
        data.id = db.allocateObjectId();
        data.tableName = "TEMP_RESULT_SET_" + data.id;
        data.temporary = true;
        data.persistIndexes = false;
        data.persistData = true;
        data.create = true;
        data.session = session;
        table = (TableBase) schema.createTable(data);
        int indexId = db.allocateObjectId();
        IndexColumn indexColumn = new IndexColumn();
        indexColumn.column = column;
        indexColumn.columnName = COLUMN_NAME;
        IndexType indexType;
        indexType = IndexType.createPrimaryKey(true, false);
        IndexColumn[] indexCols = { indexColumn };
        index = db.createPersistentIndex(table, indexId, data.tableName, indexCols, indexType, true, session);
        index.setTemporary(true);
        table.getIndexes().add(index);
        parent = null;
    }
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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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    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 ValueResultSet getTable(Session session, Expression[] argList, boolean onlyColumnList, boolean distinctRows) {
        int len = columnList.length;
        Expression[] header = new Expression[len];
        Database db = session.getDatabase();
        for (int i = 0; i < len; i++) {
            Column c = columnList[i];
            ExpressionColumn col = new ExpressionColumn(db, c);
            header[i] = col;
        }
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    public static Expression[] getExpressionColumns(Session session, ResultSet rs) {
        try {
            ResultSetMetaData meta = rs.getMetaData();
            int columnCount = meta.getColumnCount();
            Expression[] expressions = new Expression[columnCount];
            Database db = session == null ? null : session.getDatabase();
            for (int i = 0; i < columnCount; i++) {
                String name = meta.getColumnLabel(i + 1);
                int type = DataType.convertSQLTypeToValueType(meta.getColumnType(i + 1));
                int precision = meta.getPrecision(i + 1);
                int scale = meta.getScale(i + 1);
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Related Classes of org.lealone.engine.Database

  • org.lealone.api.DatabaseEventListener
  • org.lealone.cassandra.command.ddl.CreateKeyspace
  • org.lealone.command.Command
  • org.lealone.command.ddl.AlterIndexRename
  • org.lealone.command.ddl.AlterSchemaRename
  • org.lealone.command.ddl.AlterSequence
  • org.lealone.command.ddl.AlterTableAddConstraint
  • org.lealone.command.ddl.AlterTableAlterColumn
  • org.lealone.command.ddl.AlterTableRename
  • org.lealone.command.ddl.AlterTableRenameColumn
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