Package org.h2.engine

Examples of org.h2.engine.Database

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    }

    public int update() {
        session.getUser().checkAdmin();
        session.commit(true);
        Database db = session.getDatabase();
        if (db.findRole(userName) != null) {
            throw DbException.get(ErrorCode.ROLE_ALREADY_EXISTS_1, userName);
        }
        if (db.findUser(userName) != null) {
            if (ifNotExists) {
                return 0;
            }
            throw DbException.get(ErrorCode.USER_ALREADY_EXISTS_1, userName);
        }
        int id = getObjectId();
        User user = new User(db, id, userName, false);
        user.setAdmin(admin);
        user.setComment(comment);
        if (hash != null && salt != null) {
            user.setSaltAndHash(getByteArray(salt), getByteArray(hash));
        } else if (password != null) {
            char[] passwordChars = getCharArray(password);
            byte[] userPasswordHash;
            if (userName.length() == 0 && passwordChars.length == 0 && SysProperties.EMPTY_PASSWORD) {
                userPasswordHash = new byte[0];
            } else {
                userPasswordHash = SHA256.getKeyPasswordHash(userName, passwordChars);
            }
            user.setUserPasswordHash(userPasswordHash);
        } else {
            throw DbException.throwInternalError();
        }
        db.addDatabaseObject(session, user);
        return 0;
    }
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    private void removeSequence(Sequence sequence) {
        if (sequence != null) {
            table.removeSequence(session, sequence);
            sequence.setBelongsToTable(false);
            Database db = session.getDatabase();
            db.removeSchemaObject(session, sequence);
        }
    }
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    private void copyData() {
        if (table.isTemporary()) {
            throw DbException.getUnsupportedException("TEMP TABLE");
        }
        Database db = session.getDatabase();
        String baseName = table.getName();
        String tempName = db.getTempTableName(baseName, session);
        Column[] columns = table.getColumns();
        ArrayList<Column> newColumns = New.arrayList();
        Table newTable = cloneTableStructure(columns, db, tempName, newColumns);
        try {
            // check if a view would become invalid
            // (because the column to drop is referenced or so)
            checkViews(table, newTable);
        } catch (DbException e) {
            execute("DROP TABLE " + newTable.getName(), true);
            throw DbException.get(ErrorCode.VIEW_IS_INVALID_2, e, getSQL(), e.getMessage());
        }
        String tableName = table.getName();
        ArrayList<TableView> views = table.getViews();
        if (views != null) {
            views = New.arrayList(views);
            for (TableView view : views) {
                table.removeView(view);
            }
        }
        execute("DROP TABLE " + table.getSQL() + " IGNORE", true);
        db.renameSchemaObject(session, newTable, tableName);
        for (DbObject child : newTable.getChildren()) {
            if (child instanceof Sequence) {
                continue;
            }
            String name = child.getName();
            if (name == null || child.getCreateSQL() == null) {
                continue;
            }
            if (name.startsWith(tempName + "_")) {
                name = name.substring(tempName.length() + 1);
                SchemaObject so = (SchemaObject) child;
                if (so instanceof Constraint) {
                    if (so.getSchema().findConstraint(session, name) != null) {
                        name = so.getSchema().getUniqueConstraintName(session, newTable);
                    }
                } else if (so instanceof Index) {
                    if (so.getSchema().findIndex(session, name) != null) {
                        name = so.getSchema().getUniqueIndexName(session, newTable, name);
                    }
                }
                db.renameSchemaObject(session, so, name);
            }
        }
        if (views != null) {
            for (TableView view : views) {
                String sql = view.getCreateSQL(true, true);
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     * Check that all views and other dependent objects.
     */
    private void checkViews(SchemaObject sourceTable, SchemaObject newTable) {
        String sourceTableName = sourceTable.getName();
        String newTableName = newTable.getName();
        Database db = sourceTable.getDatabase();
        // save the real table under a temporary name
        String temp = db.getTempTableName(sourceTableName, session);
        db.renameSchemaObject(session, sourceTable, temp);
        try {
            // have our new table impersonate the target table
            db.renameSchemaObject(session, newTable, sourceTableName);
            checkViewsAreValid(sourceTable);
        } finally {
            // always put the source tables back with their proper names
            try {
                db.renameSchemaObject(session, newTable, newTableName);
            } finally {
                db.renameSchemaObject(session, sourceTable, sourceTableName);
            }
        }
    }
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        // meanwhile (dependent object, or same object)
        table = getSchema().findTableOrView(session, tableName);

        if (table != null) {
            table.setModified();
            Database db = session.getDatabase();
            db.removeSchemaObject(session, table);
        }
        if (next != null) {
            next.executeDrop();
        }
    }
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            IOUtils.delete(file);
        }
    }

    private void initStore() {
        Database db = session.getDatabase();
        // script files are always in text format
        String file = getFileName();
        store = FileStore.open(db, file, "rw", cipher, key);
        store.setCheckedWriting(false);
        store.init();
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     */
    private int tryUpdate() {
        if (!transactional) {
            session.commit(true);
        }
        Database db = session.getDatabase();
        Table table = getSchema().getTableOrView(session, tableName);
        if (getSchema().findConstraint(session, constraintName) != null) {
            if (ifNotExists) {
                return 0;
            }
            throw DbException.get(ErrorCode.CONSTRAINT_ALREADY_EXISTS_1, constraintName);
        }
        session.getUser().checkRight(table, Right.ALL);
        table.lock(session, true, true);
        Constraint constraint;
        switch (type) {
        case CommandInterface.ALTER_TABLE_ADD_CONSTRAINT_PRIMARY_KEY: {
            IndexColumn.mapColumns(indexColumns, table);
            index = table.findPrimaryKey();
            ArrayList<Constraint> constraints = table.getConstraints();
            for (int i = 0; constraints != null && i < constraints.size(); i++) {
                Constraint c = constraints.get(i);
                if (Constraint.PRIMARY_KEY.equals(c.getConstraintType())) {
                    throw DbException.get(ErrorCode.SECOND_PRIMARY_KEY);
                }
            }
            if (index != null) {
                // if there is an index, it must match with the one declared
                // we don't test ascending / descending
                IndexColumn[] pkCols = index.getIndexColumns();
                if (pkCols.length != indexColumns.length) {
                    throw DbException.get(ErrorCode.SECOND_PRIMARY_KEY);
                }
                for (int i = 0; i < pkCols.length; i++) {
                    if (pkCols[i].column != indexColumns[i].column) {
                        throw DbException.get(ErrorCode.SECOND_PRIMARY_KEY);
                    }
                }
            }
            if (index == null) {
                IndexType indexType = IndexType.createPrimaryKey(table.isPersistIndexes(), primaryKeyHash);
                String indexName = table.getSchema().getUniqueIndexName(session, table, Constants.PREFIX_PRIMARY_KEY);
                int id = getObjectId();
                try {
                    index = table.addIndex(session, indexName, id, indexColumns, indexType, true, null);
                } finally {
                    getSchema().freeUniqueName(indexName);
                }
            }
            index.getIndexType().setBelongsToConstraint(true);
            int constraintId = getObjectId();
            String name = generateConstraintName(table);
            ConstraintUnique pk = new ConstraintUnique(getSchema(), constraintId, name, table, true);
            pk.setColumns(indexColumns);
            pk.setIndex(index, true);
            constraint = pk;
            break;
        }
        case CommandInterface.ALTER_TABLE_ADD_CONSTRAINT_UNIQUE: {
            IndexColumn.mapColumns(indexColumns, table);
            boolean isOwner = false;
            if (index != null && canUseUniqueIndex(index, table, indexColumns)) {
                isOwner = true;
                index.getIndexType().setBelongsToConstraint(true);
            } else {
                index = getUniqueIndex(table, indexColumns);
                if (index == null) {
                    index = createIndex(table, indexColumns, true);
                    isOwner = true;
                }
            }
            int id = getObjectId();
            String name = generateConstraintName(table);
            ConstraintUnique unique = new ConstraintUnique(getSchema(), id, name, table, false);
            unique.setColumns(indexColumns);
            unique.setIndex(index, isOwner);
            constraint = unique;
            break;
        }
        case CommandInterface.ALTER_TABLE_ADD_CONSTRAINT_CHECK: {
            int id = getObjectId();
            String name = generateConstraintName(table);
            ConstraintCheck check = new ConstraintCheck(getSchema(), id, name, table);
            TableFilter filter = new TableFilter(session, table, null, false, null);
            checkExpression.mapColumns(filter, 0);
            checkExpression = checkExpression.optimize(session);
            check.setExpression(checkExpression);
            check.setTableFilter(filter);
            constraint = check;
            if (checkExisting) {
                check.checkExistingData(session);
            }
            break;
        }
        case CommandInterface.ALTER_TABLE_ADD_CONSTRAINT_REFERENTIAL: {
            Table refTable = refSchema.getTableOrView(session, refTableName);
            session.getUser().checkRight(refTable, Right.ALL);
            if (!refTable.canReference()) {
                throw DbException.get(ErrorCode.FEATURE_NOT_SUPPORTED_1, "Reference " + refTable.getSQL());
            }
            boolean isOwner = false;
            IndexColumn.mapColumns(indexColumns, table);
            if (index != null && canUseIndex(index, table, indexColumns)) {
                isOwner = true;
                index.getIndexType().setBelongsToConstraint(true);
            } else {
                index = getIndex(table, indexColumns);
                if (index == null) {
                    index = createIndex(table, indexColumns, false);
                    isOwner = true;
                }
            }
            if (refIndexColumns == null) {
                Index refIdx = refTable.getPrimaryKey();
                refIndexColumns = refIdx.getIndexColumns();
            } else {
                IndexColumn.mapColumns(refIndexColumns, refTable);
            }
            if (refIndexColumns.length != indexColumns.length) {
                throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
            }
            boolean isRefOwner = false;
            if (refIndex != null && refIndex.getTable() == refTable) {
                isRefOwner = true;
                refIndex.getIndexType().setBelongsToConstraint(true);
            } else {
                refIndex = null;
            }
            if (refIndex == null) {
                refIndex = getUniqueIndex(refTable, refIndexColumns);
                if (refIndex == null) {
                    refIndex = createIndex(refTable, refIndexColumns, true);
                    isRefOwner = true;
                }
            }
            int id = getObjectId();
            String name = generateConstraintName(table);
            ConstraintReferential ref = new ConstraintReferential(getSchema(), id, name, table);
            ref.setColumns(indexColumns);
            ref.setIndex(index, isOwner);
            ref.setRefTable(refTable);
            ref.setRefColumns(refIndexColumns);
            ref.setRefIndex(refIndex, isRefOwner);
            if (checkExisting) {
                ref.checkExistingData(session);
            }
            constraint = ref;
            refTable.addConstraint(constraint);
            ref.setDeleteAction(deleteAction);
            ref.setUpdateAction(updateAction);
            break;
        }
        default:
            throw DbException.throwInternalError("type=" + type);
        }
        // parent relationship is already set with addConstraint
        constraint.setComment(comment);
        if (table.isTemporary() && !table.isGlobalTemporary()) {
            session.addLocalTempTableConstraint(constraint);
        } else {
            db.addSchemaObject(session, constraint);
        }
        table.addConstraint(constraint);
        return 0;
    }
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            cacheableChecked = true;
        }
        if (noCache) {
            return false;
        }
        Database db = s.getDatabase();
        for (int i = 0; i < params.length; i++) {
            if (!db.areEqual(lastParams[i], params[i])) {
                return false;
            }
        }
        if (!isEverything(ExpressionVisitor.DETERMINISTIC_VISITOR) || !isEverything(ExpressionVisitor.INDEPENDENT_VISITOR)) {
            return false;
        }
        if (db.getModificationDataId() > lastEval && getMaxDataModificationId() > lastEval) {
            return false;
        }
        return true;
    }
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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 void dropAllObjects() {
        session.getUser().checkAdmin();
        session.commit(true);
        Database db = session.getDatabase();
        // TODO local temp tables are not removed
        for (Schema schema : db.getAllSchemas()) {
            if (schema.canDrop()) {
                db.removeDatabaseObject(session, schema);
            }
        }
        ArrayList<Table> tables = db.getAllTablesAndViews(false);
        for (Table t : tables) {
            if (t.getName() != null && Table.VIEW.equals(t.getTableType())) {
                db.removeSchemaObject(session, t);
            }
        }
        for (Table t : tables) {
            if (t.getName() != null && Table.TABLE_LINK.equals(t.getTableType())) {
                db.removeSchemaObject(session, t);
            }
        }
        for (Table t : tables) {
            if (t.getName() != null && Table.TABLE.equals(t.getTableType()) && !t.isHidden()) {
                db.removeSchemaObject(session, t);
            }
        }
        session.findLocalTempTable(null);
        ArrayList<SchemaObject> list = New.arrayList();
        list.addAll(db.getAllSchemaObjects(DbObject.SEQUENCE));
        // maybe constraints and triggers on system tables will be allowed in
        // the future
        list.addAll(db.getAllSchemaObjects(DbObject.CONSTRAINT));
        list.addAll(db.getAllSchemaObjects(DbObject.TRIGGER));
        list.addAll(db.getAllSchemaObjects(DbObject.CONSTANT));
        list.addAll(db.getAllSchemaObjects(DbObject.FUNCTION_ALIAS));
        for (SchemaObject obj : list) {
            if (obj.isHidden()) {
                continue;
            }
            db.removeSchemaObject(session, obj);
        }
        for (User user : db.getAllUsers()) {
            if (user != session.getUser()) {
                db.removeDatabaseObject(session, user);
            }
        }
        for (Role role : db.getAllRoles()) {
            String sql = role.getCreateSQL();
            // the role PUBLIC must not be dropped
            if (sql != null) {
                db.removeDatabaseObject(session, role);
            }
        }
        ArrayList<DbObject> dbObjects = New.arrayList();
        dbObjects.addAll(db.getAllRights());
        dbObjects.addAll(db.getAllAggregates());
        dbObjects.addAll(db.getAllUserDataTypes());
        for (DbObject obj : dbObjects) {
            String sql = obj.getCreateSQL();
            // the role PUBLIC must not be dropped
            if (sql != null) {
                db.removeDatabaseObject(session, obj);
            }
        }
    }
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