Examples with ScanStatement herddb.model.commands.ScanStatement used on opensource projects

Example 1 with ScanStatement

use of herddb.model.commands.ScanStatement in project herddb by diennea.

the class SQLPlanner method buildSelectStatement.

private ExecutionPlan buildSelectStatement(String defaultTableSpace, Select s, boolean scan, int maxRows) throws StatementExecutionException {
    PlainSelect selectBody = (PlainSelect) s.getSelectBody();
    net.sf.jsqlparser.schema.Table fromTable = (net.sf.jsqlparser.schema.Table) selectBody.getFromItem();
    TableRef mainTable = TableRef.buildFrom(fromTable, defaultTableSpace);
    String mainTableAlias = mainTable.tableAlias;
    String tableSpace = mainTable.tableSpace;
    TableSpaceManager tableSpaceManager = manager.getTableSpaceManager(tableSpace);
    if (tableSpaceManager == null) {
        throw new TableSpaceDoesNotExistException("no such tablespace " + tableSpace + " here at " + manager.getNodeId());
    }
    AbstractTableManager tableManager = tableSpaceManager.getTableManager(mainTable.tableName);
    if (tableManager == null) {
        throw new TableDoesNotExistException("no such table " + mainTable.tableName + " in tablespace " + tableSpace);
    }
    // linked hash map retains the order of insertions
    LinkedHashMap<String, JoinSupport> joins = new LinkedHashMap<>();
    boolean joinPresent = false;
    joins.put(mainTable.tableAlias, new JoinSupport(mainTable, tableManager));
    if (selectBody.getJoins() != null) {
        for (Join join : selectBody.getJoins()) {
            joinPresent = true;
            if (join.isLeft() || join.isCross() || join.isRight() || join.isOuter() || join.isSimple()) {
                throw new StatementExecutionException("unsupported JOIN type: " + join);
            }
            net.sf.jsqlparser.schema.Table joinedTable = (net.sf.jsqlparser.schema.Table) join.getRightItem();
            TableRef joinedTableRef = TableRef.buildFrom(joinedTable, defaultTableSpace);
            if (!joinedTableRef.tableSpace.equalsIgnoreCase(mainTable.tableSpace)) {
                throw new TableDoesNotExistException("unsupported cross-tablespace JOIN " + "between" + mainTable.tableSpace + "." + mainTable.tableName + " and " + joinedTableRef.tableSpace + "." + joinedTableRef.tableName);
            }
            AbstractTableManager joinedTableManager = tableSpaceManager.getTableManager(joinedTableRef.tableName);
            if (joinedTableManager == null) {
                throw new TableDoesNotExistException("no such table " + joinedTableRef.tableName + " in tablespace " + tableSpace);
            }
            JoinSupport joinSupport = new JoinSupport(joinedTableRef, joinedTableManager);
            joins.put(joinedTableRef.tableAlias, joinSupport);
        }
    }
    Projection mainTableProjection;
    Table table = tableManager.getTable();
    boolean allColumns = false;
    boolean containsAggregateFunctions = false;
    for (SelectItem c : selectBody.getSelectItems()) {
        if (c instanceof AllColumns) {
            allColumns = true;
            break;
        } else if (c instanceof AllTableColumns) {
            AllTableColumns allTableColumns = (AllTableColumns) c;
            TableRef ref = TableRef.buildFrom(allTableColumns.getTable(), defaultTableSpace);
            if (!joinPresent && ref.tableAlias.equals(mainTable.tableAlias)) {
                // select a.*  FROM table a
                allColumns = true;
            } else {
                // select a.*, b.* FROM table a JOIN table b
                joins.get(ref.tableAlias).allColumns = true;
            }
        } else if (c instanceof SelectExpressionItem) {
            SelectExpressionItem se = (SelectExpressionItem) c;
            if (isAggregateFunction(se.getExpression())) {
                containsAggregateFunctions = true;
            }
            if (!joinPresent) {
                joins.get(mainTable.tableAlias).selectItems.add(c);
            } else {
                ColumnReferencesDiscovery discoverMainTableAlias = discoverMainTableAlias(se.getExpression());
                String mainTableAliasForItem = discoverMainTableAlias.getMainTableAlias();
                if (discoverMainTableAlias.isContainsMixedAliases()) {
                    throw new StatementExecutionException("unsupported single SELECT ITEM with mixed aliases: " + c);
                }
                if (mainTableAliasForItem == null) {
                    mainTableAliasForItem = mainTable.tableAlias;
                }
                joins.get(mainTableAliasForItem).selectItems.add(c);
            }
        } else {
            throw new StatementExecutionException("unsupported SELECT ITEM type: " + c);
        }
    }
    if (allColumns) {
        mainTableProjection = Projection.IDENTITY(table.columnNames, table.columns);
        for (Map.Entry<String, JoinSupport> join : joins.entrySet()) {
            JoinSupport support = join.getValue();
            support.projection = Projection.IDENTITY(support.table.columnNames, support.table.columns);
            support.allColumns = true;
        }
    } else {
        if (!joinPresent) {
            mainTableProjection = new SQLProjection(table, mainTableAlias, selectBody.getSelectItems());
        } else {
            for (JoinSupport support : joins.values()) {
                if (support.allColumns) {
                    support.projection = Projection.IDENTITY(support.table.columnNames, support.table.columns);
                } else {
                    support.projection = new SQLProjection(support.table, support.tableRef.tableAlias, support.selectItems);
                }
            }
            mainTableProjection = joins.get(mainTableAlias).projection;
        }
    }
    if (scan) {
        if (!joinPresent) {
            SQLRecordPredicate where = selectBody.getWhere() != null ? new SQLRecordPredicate(table, mainTableAlias, selectBody.getWhere()) : null;
            if (where != null) {
                discoverIndexOperations(selectBody.getWhere(), table, mainTableAlias, where, tableSpaceManager);
            }
            Aggregator aggregator = null;
            ScanLimitsImpl scanLimits = null;
            if (containsAggregateFunctions || (selectBody.getGroupByColumnReferences() != null && !selectBody.getGroupByColumnReferences().isEmpty())) {
                aggregator = new SQLAggregator(selectBody.getSelectItems(), selectBody.getGroupByColumnReferences(), manager.getRecordSetFactory());
            }
            TupleComparator comparatorOnScan = null;
            TupleComparator comparatorOnPlan = null;
            if (selectBody.getOrderByElements() != null && !selectBody.getOrderByElements().isEmpty()) {
                if (aggregator != null) {
                    comparatorOnPlan = SingleColumnSQLTupleComparator.make(mainTableAlias, selectBody.getOrderByElements(), null);
                } else {
                    comparatorOnScan = SingleColumnSQLTupleComparator.make(mainTableAlias, selectBody.getOrderByElements(), table.primaryKey);
                }
            }
            Limit limit = selectBody.getLimit();
            Top top = selectBody.getTop();
            if (limit != null && top != null) {
                throw new StatementExecutionException("LIMIT and TOP cannot be used on the same query");
            }
            if (limit != null) {
                if (limit.isLimitAll() || limit.isLimitNull() || limit.getOffset() instanceof JdbcParameter) {
                    throw new StatementExecutionException("Invalid LIMIT clause (limit=" + limit + ")");
                }
                if (maxRows > 0 && limit.getRowCount() instanceof JdbcParameter) {
                    throw new StatementExecutionException("Invalid LIMIT clause (limit=" + limit + ") and JDBC setMaxRows=" + maxRows);
                }
                int rowCount;
                int rowCountJdbcParameter = -1;
                if (limit.getRowCount() instanceof JdbcParameter) {
                    rowCount = -1;
                    rowCountJdbcParameter = ((JdbcParameter) limit.getRowCount()).getIndex() - 1;
                } else {
                    rowCount = ((Number) resolveValue(limit.getRowCount(), false)).intValue();
                }
                int offset = limit.getOffset() != null ? ((Number) resolveValue(limit.getOffset(), false)).intValue() : 0;
                scanLimits = new ScanLimitsImpl(rowCount, offset, rowCountJdbcParameter + 1);
            } else if (top != null) {
                if (top.isPercentage() || top.getExpression() == null) {
                    throw new StatementExecutionException("Invalid TOP clause (top=" + top + ")");
                }
                try {
                    int rowCount = Integer.parseInt(resolveValue(top.getExpression(), false) + "");
                    scanLimits = new ScanLimitsImpl(rowCount, 0);
                } catch (NumberFormatException error) {
                    throw new StatementExecutionException("Invalid TOP clause: " + error, error);
                }
            }
            if (maxRows > 0) {
                if (scanLimits == null) {
                    scanLimits = new ScanLimitsImpl(maxRows, 0);
                } else if (scanLimits.getMaxRows() <= 0 || scanLimits.getMaxRows() > maxRows) {
                    scanLimits = new ScanLimitsImpl(maxRows, scanLimits.getOffset());
                }
            }
            ScanLimitsImpl limitsOnScan = null;
            ScanLimitsImpl limitsOnPlan = null;
            if (aggregator != null) {
                limitsOnPlan = scanLimits;
            } else {
                limitsOnScan = scanLimits;
            }
            try {
                ScanStatement statement = new ScanStatement(tableSpace, mainTable.tableName, mainTableProjection, where, comparatorOnScan, limitsOnScan);
                return ExecutionPlan.make(statement, aggregator, limitsOnPlan, comparatorOnPlan);
            } catch (IllegalArgumentException err) {
                throw new StatementExecutionException(err);
            }
        } else {
            if (containsAggregateFunctions || (selectBody.getGroupByColumnReferences() != null && !selectBody.getGroupByColumnReferences().isEmpty())) {
                throw new StatementExecutionException("AGGREGATEs are not yet supported with JOIN");
            }
            Limit limit = selectBody.getLimit();
            Top top = selectBody.getTop();
            if (limit != null && top != null) {
                throw new StatementExecutionException("LIMIT and TOP cannot be used on the same query");
            }
            ScanLimitsImpl scanLimits = null;
            if (limit != null) {
                if (limit.isLimitAll() || limit.isLimitNull() || limit.getOffset() instanceof JdbcParameter) {
                    throw new StatementExecutionException("Invalid LIMIT clause (limit=" + limit + ")");
                }
                if (maxRows > 0 && limit.getRowCount() instanceof JdbcParameter) {
                    throw new StatementExecutionException("Invalid LIMIT clause (limit=" + limit + ") and JDBC setMaxRows=" + maxRows);
                }
                int rowCount;
                int rowCountJdbcParameter = -1;
                if (limit.getRowCount() instanceof JdbcParameter) {
                    rowCount = -1;
                    rowCountJdbcParameter = ((JdbcParameter) limit.getRowCount()).getIndex() - 1;
                } else {
                    rowCount = ((Number) resolveValue(limit.getRowCount(), false)).intValue();
                }
                int offset = limit.getOffset() != null ? ((Number) resolveValue(limit.getOffset(), false)).intValue() : 0;
                scanLimits = new ScanLimitsImpl(rowCount, offset, rowCountJdbcParameter + 1);
            } else if (top != null) {
                if (top.isPercentage() || top.getExpression() == null) {
                    throw new StatementExecutionException("Invalid TOP clause");
                }
                try {
                    int rowCount = Integer.parseInt(resolveValue(top.getExpression(), false) + "");
                    scanLimits = new ScanLimitsImpl(rowCount, 0);
                } catch (NumberFormatException error) {
                    throw new StatementExecutionException("Invalid TOP clause: " + error, error);
                }
            }
            if (maxRows > 0) {
                if (scanLimits == null) {
                    scanLimits = new ScanLimitsImpl(maxRows, 0);
                } else if (scanLimits.getMaxRows() <= 0 || scanLimits.getMaxRows() > maxRows) {
                    scanLimits = new ScanLimitsImpl(maxRows, scanLimits.getOffset());
                }
            }
            List<ColumnReferencesDiscovery> conditionsOnJoinedResult = new ArrayList<>();
            List<ScanStatement> scans = new ArrayList<>();
            for (Map.Entry<String, JoinSupport> join : joins.entrySet()) {
                String alias = join.getKey();
                JoinSupport joinSupport = join.getValue();
                Expression collectedConditionsForAlias = collectConditionsForAlias(alias, selectBody.getWhere(), conditionsOnJoinedResult, mainTableAlias);
                LOG.severe("Collected WHERE for alias " + alias + ": " + collectedConditionsForAlias);
                if (collectedConditionsForAlias == null) {
                    joinSupport.predicate = null;
                } else {
                    joinSupport.predicate = new SQLRecordPredicate(join.getValue().table, alias, collectedConditionsForAlias);
                }
            }
            for (Join join : selectBody.getJoins()) {
                if (join.getOnExpression() != null) {
                    ColumnReferencesDiscovery discoverMainTableAliasForJoinCondition = discoverMainTableAlias(join.getOnExpression());
                    conditionsOnJoinedResult.add(discoverMainTableAliasForJoinCondition);
                    LOG.severe("Collected ON-condition on final JOIN result: " + join.getOnExpression());
                }
            }
            for (ColumnReferencesDiscovery e : conditionsOnJoinedResult) {
                LOG.severe("Collected WHERE on final JOIN result: " + e.getExpression());
                for (Map.Entry<String, List<net.sf.jsqlparser.schema.Column>> entry : e.getColumnsByTable().entrySet()) {
                    String tableAlias = entry.getKey();
                    List<net.sf.jsqlparser.schema.Column> filteredColumnsOnJoin = entry.getValue();
                    LOG.severe("for  TABLE " + tableAlias + " we need to load " + filteredColumnsOnJoin);
                    JoinSupport support = joins.get(tableAlias);
                    if (support == null) {
                        throw new StatementExecutionException("invalid table alias " + tableAlias);
                    }
                    if (!support.allColumns) {
                        for (net.sf.jsqlparser.schema.Column c : filteredColumnsOnJoin) {
                            support.selectItems.add(new SelectExpressionItem(c));
                        }
                        support.projection = new SQLProjection(support.table, support.tableRef.tableAlias, support.selectItems);
                    }
                }
            }
            Map<String, Table> tables = new HashMap<>();
            for (Map.Entry<String, JoinSupport> join : joins.entrySet()) {
                JoinSupport joinSupport = join.getValue();
                tables.put(join.getKey(), joinSupport.table);
                ScanStatement statement = new ScanStatement(tableSpace, joinSupport.table.name, joinSupport.projection, joinSupport.predicate, null, null);
                scans.add(statement);
            }
            TuplePredicate joinFilter = null;
            if (!conditionsOnJoinedResult.isEmpty()) {
                joinFilter = new SQLRecordPredicate(null, null, composeAndExpression(conditionsOnJoinedResult));
            }
            Projection joinProjection = null;
            if (!allColumns) {
                joinProjection = new SQLProjection(tableSpace, tables, selectBody.getSelectItems());
            }
            TupleComparator comparatorOnPlan = null;
            if (selectBody.getOrderByElements() != null && !selectBody.getOrderByElements().isEmpty()) {
                comparatorOnPlan = SingleColumnSQLTupleComparator.make(mainTableAlias, selectBody.getOrderByElements(), null);
            }
            try {
                return ExecutionPlan.joinedScan(scans, joinFilter, joinProjection, scanLimits, comparatorOnPlan);
            } catch (IllegalArgumentException err) {
                throw new StatementExecutionException(err);
            }
        }
    } else {
        if (selectBody.getWhere() == null) {
            throw new StatementExecutionException("unsupported GET without WHERE");
        }
        if (joinPresent) {
            throw new StatementExecutionException("unsupported GET with JOIN");
        }
        // SELECT * FROM WHERE KEY=? AND ....
        SQLRecordKeyFunction keyFunction = findPrimaryKeyIndexSeek(selectBody.getWhere(), table, mainTableAlias);
        if (keyFunction == null || !keyFunction.isFullPrimaryKey()) {
            throw new StatementExecutionException("unsupported GET not on PK, bad where clause: " + selectBody.getWhere() + " (" + selectBody.getWhere().getClass() + ")");
        }
        Predicate where = buildSimplePredicate(selectBody.getWhere(), table, mainTableAlias);
        try {
            return ExecutionPlan.simple(new GetStatement(tableSpace, mainTable.tableName, keyFunction, where, false));
        } catch (IllegalArgumentException err) {
            throw new StatementExecutionException(err);
        }
    }
}

Example 2 with ScanStatement

use of herddb.model.commands.ScanStatement in project herddb by diennea.

the class ServerSideConnectionPeer method handleOpenScanner.

private void handleOpenScanner(Message message, Channel _channel) {
    String tableSpace = (String) message.parameters.get("tableSpace");
    Long tx = (Long) message.parameters.get("tx");
    long txId = tx != null ? tx : 0;
    String query = (String) message.parameters.get("query");
    String scannerId = (String) message.parameters.get("scannerId");
    int fetchSize = 10;
    if (message.parameters.containsKey("fetchSize")) {
        fetchSize = (Integer) message.parameters.get("fetchSize");
    }
    int maxRows = 0;
    if (message.parameters.containsKey("maxRows")) {
        maxRows = (Integer) message.parameters.get("maxRows");
    }
    List<Object> parameters = (List<Object>) message.parameters.get("params");
    if (LOGGER.isLoggable(Level.FINEST)) {
        LOGGER.log(Level.FINEST, "openScanner txId+" + txId + ", fetchSize " + fetchSize + ", maxRows " + maxRows + "," + query + " with " + parameters);
    }
    try {
        TranslatedQuery translatedQuery = server.getManager().getPlanner().translate(tableSpace, query, parameters, true, true, false, maxRows);
        if (LOGGER.isLoggable(Level.FINEST)) {
            LOGGER.log(Level.FINEST, query + " -> " + translatedQuery.plan.mainStatement);
        }
        TransactionContext transactionContext = new TransactionContext(txId);
        if (translatedQuery.plan.mainStatement instanceof SQLPlannedOperationStatement || translatedQuery.plan.mainStatement instanceof ScanStatement || translatedQuery.plan.joinStatements != null) {
            ScanResult scanResult = (ScanResult) server.getManager().executePlan(translatedQuery.plan, translatedQuery.context, transactionContext);
            DataScanner dataScanner = scanResult.dataScanner;
            ServerSideScannerPeer scanner = new ServerSideScannerPeer(dataScanner);
            String[] columns = dataScanner.getFieldNames();
            List<DataAccessor> records = dataScanner.consume(fetchSize);
            TuplesList tuplesList = new TuplesList(columns, records);
            boolean last = dataScanner.isFinished();
            LOGGER.log(Level.FINEST, "sending first {0} records to scanner {1} query {2}", new Object[] { records.size(), scannerId, query });
            if (!last) {
                scanners.put(scannerId, scanner);
            }
            _channel.sendReplyMessage(message, Message.RESULTSET_CHUNK(null, scannerId, tuplesList, last, dataScanner.transactionId));
        } else {
            _channel.sendReplyMessage(message, Message.ERROR(null, new Exception("unsupported query type for scan " + query + ": PLAN is " + translatedQuery.plan)));
        }
    } catch (DataScannerException | RuntimeException err) {
        LOGGER.log(Level.SEVERE, "error on scanner " + scannerId + ": " + err, err);
        scanners.remove(scannerId);
        Message error = Message.ERROR(null, err);
        if (err instanceof NotLeaderException) {
            error.setParameter("notLeader", "true");
        }
        _channel.sendReplyMessage(message, error);
    }
}

Example 3 with ScanStatement

use of herddb.model.commands.ScanStatement in project herddb by diennea.

the class RawSQLTest method aliasTest.

@Test
public void aliasTest() throws Exception {
    String nodeId = "localhost";
    try (DBManager manager = new DBManager("localhost", new MemoryMetadataStorageManager(), new MemoryDataStorageManager(), new MemoryCommitLogManager(), null, null)) {
        manager.start();
        CreateTableSpaceStatement st1 = new CreateTableSpaceStatement("tblspace1", Collections.singleton(nodeId), nodeId, 1, 0, 0);
        manager.executeStatement(st1, StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        manager.waitForTablespace("tblspace1", 10000);
        execute(manager, "CREATE TABLE tblspace1.tsql (k1 string primary key,n1 int,s1 string)", Collections.emptyList());
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 theKey FROM tblspace1.tsql where k1 ='mykey2'", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            PlannerOp plannerOp = translate1.plan.mainStatement.unwrap(PlannerOp.class);
            System.out.println("plannerOp:" + plannerOp);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> records = scan1.consume();
                assertEquals(0, records.size());
                assertEquals(1, scan1.getFieldNames().length);
                assertEquals("thekey", scan1.getFieldNames()[0].toLowerCase());
            }
        }
    }
}

Example 4 with ScanStatement

use of herddb.model.commands.ScanStatement in project herddb by diennea.

the class RawSQLTest method indexSeek.

@Test
public void indexSeek() throws Exception {
    String nodeId = "localhost";
    try (DBManager manager = new DBManager("localhost", new MemoryMetadataStorageManager(), new MemoryDataStorageManager(), new MemoryCommitLogManager(), null, null)) {
        manager.start();
        CreateTableSpaceStatement st1 = new CreateTableSpaceStatement("tblspace1", Collections.singleton(nodeId), nodeId, 1, 0, 0);
        manager.executeStatement(st1, StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        manager.waitForTablespace("tblspace1", 10000);
        execute(manager, "CREATE TABLE tblspace1.tsql (k1 string primary key,n1 int,s1 string)", Collections.emptyList());
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1,n1) values(?,?)", Arrays.asList("mykey", Integer.valueOf(1234))).getUpdateCount());
        {
            TranslatedQuery translated = manager.getPlanner().translate(TableSpace.DEFAULT, " SELECT k1 as theKey,'one' as theStringConstant,3  LongConstant" + " FROM tblspace1.tsql" + " where k1 ='mykey'", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translated.plan.mainStatement.unwrap(ScanStatement.class);
            assertTrue(scan.getPredicate().getIndexOperation() instanceof PrimaryIndexSeek);
            try (DataScanner scan1 = ((ScanResult) manager.executePlan(translated.plan, translated.context, TransactionContext.NO_TRANSACTION)).dataScanner) {
                List<DataAccessor> records = scan1.consume();
                assertEquals(1, records.size());
                assertEquals(3, records.get(0).getFieldNames().length);
                assertEquals(3, records.get(0).toMap().size());
                assertEquals("thekey", records.get(0).getFieldNames()[0].toLowerCase());
                assertEquals(RawString.of("mykey"), records.get(0).get("theKey"));
                assertEquals("thestringconstant", records.get(0).getFieldNames()[1].toLowerCase());
                assertEquals(RawString.of("one"), records.get(0).get("theStringConstant"));
                assertEquals("longconstant", records.get(0).getFieldNames()[2].toLowerCase());
                assertEquals(3L, ((Number) records.get(0).get("LongConstant")).longValue());
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 as theKey,'one' as theStringConstant,3  LongConstant FROM tblspace1.tsql where k1 = 'mykey_no'", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            assertTrue(scan.getPredicate().getIndexOperation() instanceof PrimaryIndexSeek);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                assertTrue(scan1.consume().isEmpty());
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 as theKey,'one' as theStringConstant,3  LongConstant FROM tblspace1.tsql where k1 = 'mykey' and n1<>1234", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            assertTrue(scan.getPredicate().getIndexOperation() instanceof PrimaryIndexSeek);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                assertTrue(scan1.consume().isEmpty());
            }
        }
    }
}

Example 5 with ScanStatement

use of herddb.model.commands.ScanStatement in project herddb by diennea.

the class RawSQLTest method orderByTest.

@Test
public void orderByTest() throws Exception {
    String nodeId = "localhost";
    try (DBManager manager = new DBManager("localhost", new MemoryMetadataStorageManager(), new MemoryDataStorageManager(), new MemoryCommitLogManager(), null, null)) {
        manager.start();
        CreateTableSpaceStatement st1 = new CreateTableSpaceStatement("tblspace1", Collections.singleton(nodeId), nodeId, 1, 0, 0);
        manager.executeStatement(st1, StatementEvaluationContext.DEFAULT_EVALUATION_CONTEXT(), TransactionContext.NO_TRANSACTION);
        manager.waitForTablespace("tblspace1", 10000);
        execute(manager, "CREATE TABLE tblspace1.tsql (k1 string primary key,n1 int,s1 string)", Collections.emptyList());
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1,n1) values(?,?)", Arrays.asList("mykey", Integer.valueOf(1))).getUpdateCount());
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1,n1) values(?,?)", Arrays.asList("mykey2", Integer.valueOf(2))).getUpdateCount());
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1,n1) values(?,?)", Arrays.asList("mykey3", Integer.valueOf(4))).getUpdateCount());
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1) values(?)", Arrays.asList("mykey4")).getUpdateCount());
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(4, result.size());
                assertEquals(RawString.of("mykey"), result.get(0).get(0));
                assertEquals(RawString.of("mykey2"), result.get(1).get(0));
                assertEquals(RawString.of("mykey3"), result.get(2).get(0));
                // NULLS LAST
                assertEquals(RawString.of("mykey4"), result.get(3).get(0));
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1 desc", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(4, result.size());
                assertEquals(RawString.of("mykey"), result.get(3).get(0));
                assertEquals(RawString.of("mykey2"), result.get(2).get(0));
                assertEquals(RawString.of("mykey3"), result.get(1).get(0));
                assertEquals(RawString.of("mykey4"), result.get(0).get(0));
            }
        }
        assertEquals(1, executeUpdate(manager, "INSERT INTO tblspace1.tsql(k1,n1) values(?,?)", Arrays.asList("mykey5", Integer.valueOf(3))).getUpdateCount());
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1, k1", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(5, result.size());
                assertEquals(RawString.of("mykey"), result.get(0).get(0));
                assertEquals(RawString.of("mykey2"), result.get(1).get(0));
                assertEquals(RawString.of("mykey5"), result.get(2).get(0));
                assertEquals(RawString.of("mykey3"), result.get(3).get(0));
                // NULLS LAST
                assertEquals(RawString.of("mykey4"), result.get(4).get(0));
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1, k1 desc", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(5, result.size());
                assertEquals(RawString.of("mykey"), result.get(0).get(0));
                assertEquals(RawString.of("mykey2"), result.get(1).get(0));
                assertEquals(RawString.of("mykey5"), result.get(2).get(0));
                assertEquals(RawString.of("mykey3"), result.get(3).get(0));
                // NULLS LAST
                assertEquals(RawString.of("mykey4"), result.get(4).get(0));
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1, k1 desc limit 2", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(2, result.size());
                assertEquals(RawString.of("mykey"), result.get(0).get(0));
                assertEquals(RawString.of("mykey2"), result.get(1).get(0));
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1 asc limit 2", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(2, result.size());
                assertEquals(RawString.of("mykey"), result.get(0).get(0));
                assertEquals(RawString.of("mykey2"), result.get(1).get(0));
            }
        }
        {
            TranslatedQuery translate1 = manager.getPlanner().translate(TableSpace.DEFAULT, "SELECT k1 FROM tblspace1.tsql order by n1 desc limit 3", Collections.emptyList(), true, true, false, -1);
            ScanStatement scan = translate1.plan.mainStatement.unwrap(ScanStatement.class);
            try (DataScanner scan1 = manager.scan(scan, translate1.context, TransactionContext.NO_TRANSACTION)) {
                List<DataAccessor> result = scan1.consume();
                assertEquals(3, result.size());
                assertEquals(RawString.of("mykey4"), result.get(0).get(0));
                assertEquals(RawString.of("mykey3"), result.get(1).get(0));
                assertEquals(RawString.of("mykey5"), result.get(2).get(0));
            }
        }
    }
}