Examples with IteratorStatement org.datanucleus.store.rdbms.scostore.IteratorStatement used on opensource projects

Example 1 with IteratorStatement

use of org.datanucleus.store.rdbms.scostore.IteratorStatement in project datanucleus-rdbms by datanucleus.

the class BulkFetchExistsHandler method getStatementToBulkFetchField.

/**
 * Convenience method to generate a bulk-fetch statement for the specified multi-valued field of the owning query.
 * @param candidateCmd Metadata for the candidate
 * @param parameters Parameters for the query
 * @param mmd Metadata for the multi-valued field
 * @param datastoreCompilation The datastore compilation of the query
 * @param mapperOptions Any options for the query to SQL mapper
 * @return The bulk-fetch statement for retrieving this multi-valued field.
 */
public IteratorStatement getStatementToBulkFetchField(AbstractClassMetaData candidateCmd, AbstractMemberMetaData mmd, Query query, Map parameters, RDBMSQueryCompilation datastoreCompilation, Set<String> mapperOptions) {
    IteratorStatement iterStmt = null;
    ExecutionContext ec = query.getExecutionContext();
    ClassLoaderResolver clr = ec.getClassLoaderResolver();
    RDBMSStoreManager storeMgr = (RDBMSStoreManager) query.getStoreManager();
    Store backingStore = storeMgr.getBackingStoreForField(clr, mmd, null);
    if (backingStore instanceof JoinSetStore || backingStore instanceof JoinListStore || backingStore instanceof JoinArrayStore) {
        // Set/List/array using join-table : Generate an iterator query of the form
        if (backingStore instanceof JoinSetStore) {
            iterStmt = ((JoinSetStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false);
        } else if (backingStore instanceof JoinListStore) {
            iterStmt = ((JoinListStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false, -1, -1);
        } else if (backingStore instanceof JoinArrayStore) {
            iterStmt = ((JoinArrayStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false);
        } else {
            throw new NucleusUserException("We do not support BulkFetch using EXISTS for backingStore = " + backingStore);
        }
        // SELECT ELEM_TBL.COL1, ELEM_TBL.COL2, ... FROM JOIN_TBL INNER_JOIN ELEM_TBL WHERE JOIN_TBL.ELEMENT_ID = ELEM_TBL.ID
        // AND EXISTS (SELECT OWNER_TBL.ID FROM OWNER_TBL WHERE (queryWhereClause) AND JOIN_TBL.OWNER_ID = OWNER_TBL.ID)
        SelectStatement sqlStmt = iterStmt.getSelectStatement();
        JoinTable joinTbl = (JoinTable) sqlStmt.getPrimaryTable().getTable();
        JavaTypeMapping joinOwnerMapping = joinTbl.getOwnerMapping();
        // Generate the EXISTS subquery (based on the JDOQL/JPQL query)
        SelectStatement existsStmt = RDBMSQueryUtils.getStatementForCandidates(storeMgr, sqlStmt, candidateCmd, datastoreCompilation.getResultDefinitionForClass(), ec, query.getCandidateClass(), query.isSubclasses(), query.getResult(), null, null, null);
        Set<String> options = new HashSet<>();
        if (mapperOptions != null) {
            options.addAll(mapperOptions);
        }
        options.add(QueryToSQLMapper.OPTION_SELECT_CANDIDATE_ID_ONLY);
        QueryToSQLMapper sqlMapper = new QueryToSQLMapper(existsStmt, query.getCompilation(), parameters, null, null, candidateCmd, query.isSubclasses(), query.getFetchPlan(), ec, query.getParsedImports(), options, query.getExtensions());
        sqlMapper.compile();
        // Add EXISTS clause on iterator statement so we can restrict to just the owners in this query
        // ORDER BY in EXISTS is forbidden by some RDBMS
        existsStmt.setOrdering(null, null);
        BooleanExpression existsExpr = new BooleanSubqueryExpression(sqlStmt, "EXISTS", existsStmt);
        sqlStmt.whereAnd(existsExpr, true);
        // Join to outer statement so we restrict to collection elements for the query candidates
        SQLExpression joinTblOwnerExpr = sqlStmt.getRDBMSManager().getSQLExpressionFactory().newExpression(sqlStmt, sqlStmt.getPrimaryTable(), joinOwnerMapping);
        SQLExpression existsOwnerExpr = sqlStmt.getRDBMSManager().getSQLExpressionFactory().newExpression(existsStmt, existsStmt.getPrimaryTable(), existsStmt.getPrimaryTable().getTable().getIdMapping());
        existsStmt.whereAnd(joinTblOwnerExpr.eq(existsOwnerExpr), true);
        // Select the owner candidate so we can separate the collection elements out to their owner
        int[] ownerColIndexes = sqlStmt.select(joinTblOwnerExpr, null);
        StatementMappingIndex ownerMapIdx = new StatementMappingIndex(existsStmt.getPrimaryTable().getTable().getIdMapping());
        ownerMapIdx.setColumnPositions(ownerColIndexes);
        iterStmt.setOwnerMapIndex(ownerMapIdx);
    } else if (backingStore instanceof FKSetStore || backingStore instanceof FKListStore || backingStore instanceof FKArrayStore) {
        if (backingStore instanceof FKSetStore) {
            iterStmt = ((FKSetStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false);
        } else if (backingStore instanceof FKListStore) {
            iterStmt = ((FKListStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false, -1, -1);
        } else if (backingStore instanceof FKArrayStore) {
            iterStmt = ((FKArrayStore) backingStore).getIteratorStatement(ec, ec.getFetchPlan(), false);
        } else {
            throw new NucleusUserException("We do not support BulkFetch using EXISTS for backingStore = " + backingStore);
        }
        // Set/List/array using foreign-key : Generate an iterator query of the form
        // SELECT ELEM_TBL.COL1, ELEM_TBL.COL2, ... FROM ELEM_TBL
        // WHERE EXISTS (SELECT OWNER_TBL.ID FROM OWNER_TBL WHERE (queryWhereClause) AND ELEM_TBL.OWNER_ID = OWNER_TBL.ID)
        SelectStatement sqlStmt = iterStmt.getSelectStatement();
        // Generate the EXISTS subquery (based on the JDOQL/JPQL query)
        SelectStatement existsStmt = RDBMSQueryUtils.getStatementForCandidates(storeMgr, sqlStmt, candidateCmd, datastoreCompilation.getResultDefinitionForClass(), ec, query.getCandidateClass(), query.isSubclasses(), query.getResult(), null, null, null);
        Set<String> options = new HashSet<>();
        if (mapperOptions != null) {
            options.addAll(mapperOptions);
        }
        options.add(QueryToSQLMapper.OPTION_SELECT_CANDIDATE_ID_ONLY);
        QueryToSQLMapper sqlMapper = new QueryToSQLMapper(existsStmt, query.getCompilation(), parameters, null, null, candidateCmd, query.isSubclasses(), query.getFetchPlan(), ec, query.getParsedImports(), options, query.getExtensions());
        sqlMapper.compile();
        // Add EXISTS clause on iterator statement so we can restrict to just the owners in this query
        // ORDER BY in EXISTS is forbidden by some RDBMS
        existsStmt.setOrdering(null, null);
        BooleanExpression existsExpr = new BooleanSubqueryExpression(sqlStmt, "EXISTS", existsStmt);
        sqlStmt.whereAnd(existsExpr, true);
        // Join to outer statement so we restrict to collection elements for the query candidates
        SQLExpression elemTblOwnerExpr = sqlStmt.getRDBMSManager().getSQLExpressionFactory().newExpression(sqlStmt, sqlStmt.getPrimaryTable(), ((BaseContainerStore) backingStore).getOwnerMapping());
        SQLExpression existsOwnerExpr = sqlStmt.getRDBMSManager().getSQLExpressionFactory().newExpression(existsStmt, existsStmt.getPrimaryTable(), existsStmt.getPrimaryTable().getTable().getIdMapping());
        existsStmt.whereAnd(elemTblOwnerExpr.eq(existsOwnerExpr), true);
        // Select the owner candidate so we can separate the collection elements out to their owner
        int[] ownerColIndexes = sqlStmt.select(elemTblOwnerExpr, null);
        StatementMappingIndex ownerMapIdx = new StatementMappingIndex(existsStmt.getPrimaryTable().getTable().getIdMapping());
        ownerMapIdx.setColumnPositions(ownerColIndexes);
        iterStmt.setOwnerMapIndex(ownerMapIdx);
    }
    return iterStmt;
}

Example 2 with IteratorStatement

use of org.datanucleus.store.rdbms.scostore.IteratorStatement in project datanucleus-rdbms by datanucleus.

the class JDOQLQuery method performExecute.

protected Object performExecute(Map parameters) {
    if (statementReturnsEmpty) {
        return Collections.EMPTY_LIST;
    }
    boolean inMemory = evaluateInMemory();
    if (candidateCollection != null) {
        // Supplied collection of instances, so evaluate in-memory
        if (candidateCollection.isEmpty()) {
            return Collections.EMPTY_LIST;
        } else if (inMemory) {
            return new JDOQLInMemoryEvaluator(this, new ArrayList(candidateCollection), compilation, parameters, clr).execute(true, true, true, true, true);
        }
    } else if (type == QueryType.SELECT) {
        // Query results are cached, so return those
        List<Object> cachedResults = getQueryManager().getQueryResult(this, parameters);
        if (cachedResults != null) {
            return new CandidateIdsQueryResult(this, cachedResults);
        }
    }
    Object results = null;
    RDBMSStoreManager storeMgr = (RDBMSStoreManager) getStoreManager();
    ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
    try {
        // Execute the query
        long startTime = System.currentTimeMillis();
        if (NucleusLogger.QUERY.isDebugEnabled()) {
            NucleusLogger.QUERY.debug(Localiser.msg("021046", getLanguage(), getSingleStringQuery(), null));
        }
        AbstractClassMetaData acmd = ec.getMetaDataManager().getMetaDataForClass(candidateClass, clr);
        SQLController sqlControl = storeMgr.getSQLController();
        PreparedStatement ps = null;
        try {
            if (type == QueryType.SELECT) {
                // Create PreparedStatement and apply parameters, result settings etc
                ps = RDBMSQueryUtils.getPreparedStatementForQuery(mconn, datastoreCompilation.getSQL(), this);
                SQLStatementHelper.applyParametersToStatement(ps, ec, datastoreCompilation.getStatementParameters(), datastoreCompilation.getParameterNameByPosition(), parameters);
                RDBMSQueryUtils.prepareStatementForExecution(ps, this, true);
                registerTask(ps);
                ResultSet rs = null;
                try {
                    rs = sqlControl.executeStatementQuery(ec, mconn, datastoreCompilation.getSQL(), ps);
                } finally {
                    deregisterTask();
                }
                AbstractRDBMSQueryResult qr = null;
                try {
                    if (inMemory) {
                        // IN-MEMORY EVALUATION
                        ResultObjectFactory rof = new PersistentClassROF(ec, rs, ignoreCache, getFetchPlan(), datastoreCompilation.getResultDefinitionForClass(), acmd, candidateClass);
                        // Just instantiate the candidates for later in-memory processing
                        // TODO Use a queryResult rather than an ArrayList so we load when required
                        List candidates = new ArrayList();
                        while (rs.next()) {
                            candidates.add(rof.getObject());
                        }
                        // Perform in-memory filter/result/order etc
                        results = new JDOQLInMemoryEvaluator(this, candidates, compilation, parameters, clr).execute(true, true, true, true, true);
                    } else {
                        // IN-DATASTORE EVALUATION
                        ResultObjectFactory rof = null;
                        if (result != null) {
                            // Each result row is of a result type
                            rof = new ResultClassROF(ec, rs, ignoreCache, getFetchPlan(), resultClass, datastoreCompilation.getResultDefinition());
                        } else if (resultClass != null && resultClass != candidateClass) {
                            rof = new ResultClassROF(ec, rs, resultClass, datastoreCompilation.getResultDefinitionForClass());
                        } else {
                            // Each result row is a candidate object
                            rof = new PersistentClassROF(ec, rs, ignoreCache, getFetchPlan(), datastoreCompilation.getResultDefinitionForClass(), acmd, candidateClass);
                        }
                        // Create the required type of QueryResult
                        qr = RDBMSQueryUtils.getQueryResultForQuery(this, rof, rs, getResultDistinct() ? null : candidateCollection);
                        // Register any bulk loaded member resultSets that need loading
                        Map<String, IteratorStatement> scoIterStmts = datastoreCompilation.getSCOIteratorStatements();
                        if (scoIterStmts != null) {
                            Iterator<Map.Entry<String, IteratorStatement>> scoStmtIter = scoIterStmts.entrySet().iterator();
                            while (scoStmtIter.hasNext()) {
                                Map.Entry<String, IteratorStatement> stmtIterEntry = scoStmtIter.next();
                                IteratorStatement iterStmt = stmtIterEntry.getValue();
                                String iterStmtSQL = iterStmt.getSelectStatement().getSQLText().toSQL();
                                NucleusLogger.DATASTORE_RETRIEVE.debug("JDOQL Bulk-Fetch of " + iterStmt.getBackingStore().getOwnerMemberMetaData().getFullFieldName());
                                try {
                                    PreparedStatement psSco = sqlControl.getStatementForQuery(mconn, iterStmtSQL);
                                    if (datastoreCompilation.getStatementParameters() != null) {
                                        BulkFetchHandler.applyParametersToStatement(ec, psSco, datastoreCompilation, iterStmt.getSelectStatement(), parameters);
                                    }
                                    ResultSet rsSCO = sqlControl.executeStatementQuery(ec, mconn, iterStmtSQL, psSco);
                                    qr.registerMemberBulkResultSet(iterStmt, rsSCO);
                                } catch (SQLException e) {
                                    throw new NucleusDataStoreException(Localiser.msg("056006", iterStmtSQL), e);
                                }
                            }
                        }
                        // Initialise the QueryResult for use
                        qr.initialise();
                        // Add hooks for closing query resources
                        final QueryResult qr1 = qr;
                        final ManagedConnection mconn1 = mconn;
                        ManagedConnectionResourceListener listener = new ManagedConnectionResourceListener() {

                            public void transactionFlushed() {
                            }

                            public void transactionPreClose() {
                                // Tx : disconnect query from ManagedConnection (read in unread rows etc)
                                qr1.disconnect();
                            }

                            public void managedConnectionPreClose() {
                                if (!ec.getTransaction().isActive()) {
                                    // Non-Tx : disconnect query from ManagedConnection (read in unread rows etc)
                                    qr1.disconnect();
                                }
                            }

                            public void managedConnectionPostClose() {
                            }

                            public void resourcePostClose() {
                                mconn1.removeListener(this);
                            }
                        };
                        mconn.addListener(listener);
                        qr.addConnectionListener(listener);
                        results = qr;
                    }
                } finally {
                    if (qr == null) {
                        rs.close();
                    }
                }
            } else if (type == QueryType.BULK_UPDATE || type == QueryType.BULK_DELETE) {
                long bulkResult = 0;
                List<StatementCompilation> stmtCompilations = datastoreCompilation.getStatementCompilations();
                Iterator<StatementCompilation> stmtCompileIter = stmtCompilations.iterator();
                while (stmtCompileIter.hasNext()) {
                    StatementCompilation stmtCompile = stmtCompileIter.next();
                    ps = sqlControl.getStatementForUpdate(mconn, stmtCompile.getSQL(), false);
                    SQLStatementHelper.applyParametersToStatement(ps, ec, datastoreCompilation.getStatementParameters(), datastoreCompilation.getParameterNameByPosition(), parameters);
                    RDBMSQueryUtils.prepareStatementForExecution(ps, this, false);
                    int[] execResults = sqlControl.executeStatementUpdate(ec, mconn, toString(), ps, true);
                    if (stmtCompile.useInCount()) {
                        bulkResult += execResults[0];
                    }
                }
                try {
                    // Evict all objects of this type from the cache
                    ec.getNucleusContext().getLevel2Cache().evictAll(candidateClass, subclasses);
                } catch (UnsupportedOperationException uoe) {
                // Do nothing
                }
                results = bulkResult;
            }
        } catch (SQLException sqle) {
            if (storeMgr.getDatastoreAdapter().isStatementCancel(sqle)) {
                throw new QueryInterruptedException("Query has been interrupted", sqle);
            } else if (storeMgr.getDatastoreAdapter().isStatementTimeout(sqle)) {
                throw new QueryTimeoutException("Query has been timed out", sqle);
            }
            throw new NucleusException(Localiser.msg("021042", datastoreCompilation.getSQL()), sqle);
        }
        if (NucleusLogger.QUERY.isDebugEnabled()) {
            NucleusLogger.QUERY.debug(Localiser.msg("021074", getLanguage(), "" + (System.currentTimeMillis() - startTime)));
        }
        return results;
    } finally {
        mconn.release();
    }
}

Example 3 with IteratorStatement

use of org.datanucleus.store.rdbms.scostore.IteratorStatement in project datanucleus-rdbms by datanucleus.

the class JDOQLQuery method compileQueryFull.

/**
 * Method to set the (native) query statement for the compiled query as a whole.
 * @param parameters Input parameters (if known)
 * @param candidateCmd Metadata for the candidate class
 */
private void compileQueryFull(Map parameters, AbstractClassMetaData candidateCmd) {
    if (type != QueryType.SELECT) {
        return;
    }
    long startTime = 0;
    if (NucleusLogger.QUERY.isDebugEnabled()) {
        startTime = System.currentTimeMillis();
        NucleusLogger.QUERY.debug(Localiser.msg("021083", getLanguage(), toString()));
    }
    if (result != null) {
        datastoreCompilation.setResultDefinition(new StatementResultMapping());
    } else {
        datastoreCompilation.setResultDefinitionForClass(new StatementClassMapping());
    }
    // Generate statement for candidate(s)
    SelectStatement stmt = null;
    try {
        boolean includeSoftDeletes = getBooleanExtensionProperty(EXTENSION_INCLUDE_SOFT_DELETES, false);
        boolean dontRestrictDiscrim = getBooleanExtensionProperty(EXTENSION_CANDIDATE_DONT_RESTRICT_DISCRIMINATOR, false);
        Set<String> options = null;
        if (includeSoftDeletes) {
            options = new HashSet<>();
            options.add(SelectStatementGenerator.OPTION_INCLUDE_SOFT_DELETES);
        }
        if (dontRestrictDiscrim) {
            if (options == null) {
                options = new HashSet<>();
            }
            options.add(SelectStatementGenerator.OPTION_DONT_RESTRICT_DISCRIM);
        }
        stmt = RDBMSQueryUtils.getStatementForCandidates((RDBMSStoreManager) getStoreManager(), null, candidateCmd, datastoreCompilation.getResultDefinitionForClass(), ec, candidateClass, subclasses, result, null, null, options);
    } catch (NucleusException ne) {
        // Statement would result in no results, so just catch it and avoid generating the statement
        NucleusLogger.QUERY.warn("Query for candidates of " + candidateClass.getName() + (subclasses ? " and subclasses" : "") + " resulted in no possible candidates : " + StringUtils.getMessageFromRootCauseOfThrowable(ne));
        statementReturnsEmpty = true;
        return;
    }
    // Update the SQLStatement with filter, ordering, result etc
    Set<String> options = new HashSet<>();
    options.add(QueryToSQLMapper.OPTION_BULK_UPDATE_VERSION);
    if (getBooleanExtensionProperty(EXTENSION_USE_IS_NULL_WHEN_EQUALS_NULL_PARAM, true)) {
        options.add(QueryToSQLMapper.OPTION_NULL_PARAM_USE_IS_NULL);
    }
    if (getBooleanExtensionProperty(EXTENSION_NON_DISTINCT_IMPLICIT_JOIN, false)) {
        options.add(QueryToSQLMapper.OPTION_NON_DISTINCT_IMPLICIT_JOINS);
    }
    QueryToSQLMapper sqlMapper = new QueryToSQLMapper(stmt, compilation, parameters, datastoreCompilation.getResultDefinitionForClass(), datastoreCompilation.getResultDefinition(), candidateCmd, subclasses, getFetchPlan(), ec, getParsedImports(), options, extensions);
    setMapperJoinTypes(sqlMapper);
    sqlMapper.compile();
    datastoreCompilation.setParameterNameByPosition(sqlMapper.getParameterNameByPosition());
    datastoreCompilation.setPrecompilable(sqlMapper.isPrecompilable());
    if (!getResultDistinct() && stmt.isDistinct()) {
        setResultDistinct(true);
        compilation.setResultDistinct();
    }
    if (candidateCollection != null) {
        // Restrict to the supplied candidate ids
        BooleanExpression candidateExpr = null;
        Iterator iter = candidateCollection.iterator();
        JavaTypeMapping idMapping = stmt.getPrimaryTable().getTable().getIdMapping();
        while (iter.hasNext()) {
            Object candidate = iter.next();
            SQLExpression idExpr = stmt.getSQLExpressionFactory().newExpression(stmt, stmt.getPrimaryTable(), idMapping);
            SQLExpression idVal = stmt.getSQLExpressionFactory().newLiteral(stmt, idMapping, candidate);
            if (candidateExpr == null) {
                candidateExpr = idExpr.eq(idVal);
            } else {
                candidateExpr = candidateExpr.ior(idExpr.eq(idVal));
            }
        }
        stmt.whereAnd(candidateExpr, true);
    }
    // Apply any range
    if (range != null) {
        long lower = fromInclNo;
        long upper = toExclNo;
        if (fromInclParam != null) {
            if (parameters.containsKey(fromInclParam)) {
                lower = ((Number) parameters.get(fromInclParam)).longValue();
            } else {
                // Must be numbered input so take penultimate
                lower = ((Number) parameters.get(Integer.valueOf(parameters.size() - 2))).longValue();
            }
        }
        if (toExclParam != null) {
            if (parameters.containsKey(toExclParam)) {
                upper = ((Number) parameters.get(toExclParam)).longValue();
            } else {
                // Must be numbered input so take ultimate
                upper = ((Number) parameters.get(Integer.valueOf(parameters.size() - 1))).longValue();
            }
        }
        stmt.setRange(lower, upper - lower);
    }
    // Set any extensions
    boolean useUpdateLock = RDBMSQueryUtils.useUpdateLockForQuery(this);
    stmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, Boolean.valueOf(useUpdateLock));
    if (getBooleanExtensionProperty(EXTENSION_FOR_UPDATE_NOWAIT, false)) {
        stmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE_NOWAIT, Boolean.TRUE);
    }
    datastoreCompilation.addStatement(stmt, stmt.getSQLText().toSQL(), false);
    datastoreCompilation.setStatementParameters(stmt.getSQLText().getParametersForStatement());
    if (result == null && !(resultClass != null && resultClass != candidateClass)) {
        // Select of candidates, so check for any immediate multi-valued fields that are marked for fetching
        // TODO If the query joins to a 1-1/N-1 and then we have a multi-valued field, we should allow that too
        FetchPlanForClass fpc = getFetchPlan().getFetchPlanForClass(candidateCmd);
        int[] fpMembers = fpc.getMemberNumbers();
        String multifetchType = getStringExtensionProperty(RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_MULTIVALUED_FETCH, null);
        if ("none".equalsIgnoreCase(multifetchType)) {
        } else {
            // Bulk-Fetch
            for (int i = 0; i < fpMembers.length; i++) {
                AbstractMemberMetaData fpMmd = candidateCmd.getMetaDataForManagedMemberAtAbsolutePosition(fpMembers[i]);
                if (multifetchType == null) {
                    // Default to bulk-fetch EXISTS, so advise the user of why this is happening and how to turn it off
                    NucleusLogger.QUERY.debug("You have selected field " + fpMmd.getFullFieldName() + " for fetching by this query. We will fetch it using 'EXISTS'." + " To disable this set the query extension/hint '" + RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_MULTIVALUED_FETCH + "' as 'none' or remove the field" + " from the query FetchPlan. If this bulk-fetch generates an invalid or unoptimised query, please report it with a way of reproducing it");
                    multifetchType = "exists";
                }
                RelationType relType = fpMmd.getRelationType(clr);
                if (RelationType.isRelationMultiValued(relType)) {
                    if (fpMmd.hasCollection() && SCOUtils.collectionHasSerialisedElements(fpMmd)) {
                    // Ignore collections stored into the owner (retrieved in main query)
                    } else if (fpMmd.hasArray() && SCOUtils.arrayIsStoredInSingleColumn(fpMmd, ec.getMetaDataManager())) {
                    // Ignore arrays stored into the owner (retrieved in main query)
                    } else if (fpMmd.hasMap() && SCOUtils.mapHasSerialisedKeysAndValues(fpMmd)) {
                    // Ignore maps stored into the owner (retrieved in main query)
                    } else {
                        if ("exists".equalsIgnoreCase(multifetchType)) {
                            // Fetch container contents for all candidate owners
                            BulkFetchExistsHandler helper = new BulkFetchExistsHandler();
                            IteratorStatement iterStmt = helper.getStatementToBulkFetchField(candidateCmd, fpMmd, this, parameters, datastoreCompilation, options);
                            if (iterStmt != null) {
                                datastoreCompilation.setSCOIteratorStatement(fpMmd.getFullFieldName(), iterStmt);
                            } else {
                                NucleusLogger.GENERAL.info("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is currently not (bulk) fetched by this query");
                            }
                        } else if ("join".equalsIgnoreCase(multifetchType)) {
                            // Fetch container contents for all candidate owners
                            BulkFetchJoinHandler helper = new BulkFetchJoinHandler();
                            IteratorStatement iterStmt = helper.getStatementToBulkFetchField(candidateCmd, fpMmd, this, parameters, datastoreCompilation, options);
                            if (iterStmt != null) {
                                datastoreCompilation.setSCOIteratorStatement(fpMmd.getFullFieldName(), iterStmt);
                            } else {
                                NucleusLogger.GENERAL.info("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is currently not (bulk) fetched by this query");
                            }
                        } else {
                            NucleusLogger.GENERAL.info("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is not (bulk) fetched by this query; unsupported bulk-fetch type.");
                        }
                    }
                }
            }
        }
    }
    if (NucleusLogger.QUERY.isDebugEnabled()) {
        NucleusLogger.QUERY.debug(Localiser.msg("021084", getLanguage(), System.currentTimeMillis() - startTime));
    }
}

Example 4 with IteratorStatement

use of org.datanucleus.store.rdbms.scostore.IteratorStatement in project datanucleus-rdbms by datanucleus.

the class JPQLQuery method compileQueryFull.

/**
 * Method to set the (native) query statement for the compiled query as a whole.
 * The "table groups" in the resultant SQLStatement will be named as per the candidate alias,
 * and thereafter "{alias}.{fieldName}".
 * @param parameters Input parameters (if known)
 * @param candidateCmd Metadata for the candidate class
 */
private void compileQueryFull(Map parameters, AbstractClassMetaData candidateCmd) {
    if (type != QueryType.SELECT) {
        return;
    }
    if (candidateCollection != null) {
        return;
    }
    long startTime = 0;
    if (NucleusLogger.QUERY.isDebugEnabled()) {
        startTime = System.currentTimeMillis();
        NucleusLogger.QUERY.debug(Localiser.msg("021083", getLanguage(), toString()));
    }
    if (result != null) {
        datastoreCompilation.setResultDefinition(new StatementResultMapping());
    } else {
        datastoreCompilation.setResultDefinitionForClass(new StatementClassMapping());
    }
    // Generate statement for candidate(s)
    SelectStatement stmt = null;
    try {
        boolean includeSoftDeletes = getBooleanExtensionProperty(EXTENSION_INCLUDE_SOFT_DELETES, false);
        boolean dontRestrictDiscrim = getBooleanExtensionProperty(EXTENSION_CANDIDATE_DONT_RESTRICT_DISCRIMINATOR, false);
        Set<String> options = null;
        if (includeSoftDeletes) {
            options = new HashSet<>();
            options.add(SelectStatementGenerator.OPTION_INCLUDE_SOFT_DELETES);
        }
        if (dontRestrictDiscrim) {
            if (options == null) {
                options = new HashSet<>();
            }
            options.add(SelectStatementGenerator.OPTION_DONT_RESTRICT_DISCRIM);
        }
        stmt = RDBMSQueryUtils.getStatementForCandidates((RDBMSStoreManager) getStoreManager(), null, candidateCmd, datastoreCompilation.getResultDefinitionForClass(), ec, candidateClass, subclasses, result, compilation.getCandidateAlias(), compilation.getCandidateAlias(), options);
    } catch (NucleusException ne) {
        // Statement would result in no results, so just catch it and avoid generating the statement
        NucleusLogger.QUERY.warn("Query for candidates of " + candidateClass.getName() + (subclasses ? " and subclasses" : "") + " resulted in no possible candidates : " + StringUtils.getMessageFromRootCauseOfThrowable(ne));
        statementReturnsEmpty = true;
        return;
    }
    // Update the SQLStatement with filter, ordering, result etc
    Set<String> options = new HashSet<>();
    options.add(QueryToSQLMapper.OPTION_CASE_INSENSITIVE);
    options.add(QueryToSQLMapper.OPTION_EXPLICIT_JOINS);
    if (// Default to false for "IS NULL" with null param
    getBooleanExtensionProperty(EXTENSION_USE_IS_NULL_WHEN_EQUALS_NULL_PARAM, false)) {
        options.add(QueryToSQLMapper.OPTION_NULL_PARAM_USE_IS_NULL);
    }
    QueryToSQLMapper sqlMapper = new QueryToSQLMapper(stmt, compilation, parameters, datastoreCompilation.getResultDefinitionForClass(), datastoreCompilation.getResultDefinition(), candidateCmd, subclasses, getFetchPlan(), ec, null, options, extensions);
    setMapperJoinTypes(sqlMapper);
    sqlMapper.compile();
    datastoreCompilation.setParameterNameByPosition(sqlMapper.getParameterNameByPosition());
    datastoreCompilation.setPrecompilable(sqlMapper.isPrecompilable());
    // Apply any range
    if (range != null) {
        long lower = fromInclNo;
        long upper = toExclNo;
        if (fromInclParam != null) {
            lower = ((Number) parameters.get(fromInclParam)).longValue();
        }
        if (toExclParam != null) {
            upper = ((Number) parameters.get(toExclParam)).longValue();
        }
        long count = upper - lower;
        if (upper == Long.MAX_VALUE) {
            count = -1;
        }
        stmt.setRange(lower, count);
    }
    // Set any extensions
    boolean useUpdateLock = RDBMSQueryUtils.useUpdateLockForQuery(this);
    stmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, Boolean.valueOf(useUpdateLock));
    if (getBooleanExtensionProperty(EXTENSION_FOR_UPDATE_NOWAIT, false)) {
        stmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE_NOWAIT, Boolean.TRUE);
    }
    datastoreCompilation.addStatement(stmt, stmt.getSQLText().toSQL(), false);
    datastoreCompilation.setStatementParameters(stmt.getSQLText().getParametersForStatement());
    if (result == null && !(resultClass != null && resultClass != candidateClass)) {
        // Select of candidates, so check for any immediate multi-valued fields that are marked for fetching
        // TODO If the query joins to a 1-1/N-1 and then we have a multi-valued field, we should allow that too
        FetchPlanForClass fpc = getFetchPlan().getFetchPlanForClass(candidateCmd);
        int[] fpMembers = fpc.getMemberNumbers();
        String multifetchType = getStringExtensionProperty(RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_MULTIVALUED_FETCH, null);
        if ("none".equalsIgnoreCase(multifetchType)) {
        } else {
            // Bulk-Fetch
            for (int i = 0; i < fpMembers.length; i++) {
                AbstractMemberMetaData fpMmd = candidateCmd.getMetaDataForManagedMemberAtAbsolutePosition(fpMembers[i]);
                if (multifetchType == null) {
                    // Default to bulk-fetch, so advise the user of why this is happening and how to turn it off
                    NucleusLogger.QUERY.debug("You have selected field " + fpMmd.getFullFieldName() + " for fetching by this query. We will fetch it using 'EXISTS'." + " To disable this set the query extension/hint '" + RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_MULTIVALUED_FETCH + "' as 'none' or remove the field" + " from the query FetchPlan. If this bulk-fetch generates an invalid or unoptimised query, please report it with a way of reproducing it");
                    multifetchType = "exists";
                }
                RelationType relType = fpMmd.getRelationType(clr);
                if (RelationType.isRelationMultiValued(relType)) {
                    if (fpMmd.hasCollection() && SCOUtils.collectionHasSerialisedElements(fpMmd)) {
                    // Ignore collections stored into the owner (retrieved in main query)
                    } else if (fpMmd.hasArray() && SCOUtils.arrayIsStoredInSingleColumn(fpMmd, ec.getMetaDataManager())) {
                    // Ignore arrays stored into the owner (retrieved in main query)
                    } else if (fpMmd.hasMap() && SCOUtils.mapHasSerialisedKeysAndValues(fpMmd)) {
                    // Ignore maps stored into the owner (retrieved in main query)
                    } else {
                        if ("exists".equalsIgnoreCase(multifetchType)) {
                            // Fetch container contents for all candidate owners
                            BulkFetchExistsHandler helper = new BulkFetchExistsHandler();
                            IteratorStatement iterStmt = helper.getStatementToBulkFetchField(candidateCmd, fpMmd, this, parameters, datastoreCompilation, options);
                            if (iterStmt != null) {
                                datastoreCompilation.setSCOIteratorStatement(fpMmd.getFullFieldName(), iterStmt);
                            } else {
                                NucleusLogger.GENERAL.debug("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is currently not (bulk) fetched by this query");
                            }
                        } else if ("join".equalsIgnoreCase(multifetchType)) {
                            // Fetch container contents for all candidate owners
                            BulkFetchJoinHandler helper = new BulkFetchJoinHandler();
                            IteratorStatement iterStmt = helper.getStatementToBulkFetchField(candidateCmd, fpMmd, this, parameters, datastoreCompilation, options);
                            if (iterStmt != null) {
                                datastoreCompilation.setSCOIteratorStatement(fpMmd.getFullFieldName(), iterStmt);
                            } else {
                                NucleusLogger.GENERAL.debug("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is currently not (bulk) fetched by this query");
                            }
                        } else {
                            NucleusLogger.GENERAL.debug("Query has field " + fpMmd.getFullFieldName() + " marked in the FetchPlan, yet this is not (bulk) fetched by this query; unsupported bulk-fetch type.");
                        }
                    }
                }
            }
        }
    }
    if (NucleusLogger.QUERY.isDebugEnabled()) {
        NucleusLogger.QUERY.debug(Localiser.msg("021084", getLanguage(), System.currentTimeMillis() - startTime));
    }
}

Example 5 with IteratorStatement

use of org.datanucleus.store.rdbms.scostore.IteratorStatement in project datanucleus-rdbms by datanucleus.

the class AbstractRDBMSQueryResult method registerMemberBulkResultSet.

public void registerMemberBulkResultSet(IteratorStatement iterStmt, ResultSet rs) {
    if (bulkLoadedValueByMemberNumber == null) {
        bulkLoadedValueByMemberNumber = new HashMap<>();
    }
    try {
        ExecutionContext ec = query.getExecutionContext();
        AbstractMemberMetaData mmd = iterStmt.getBackingStore().getOwnerMemberMetaData();
        if (mmd.hasCollection() || mmd.hasArray()) {
            ElementIteratorStatement elemIterStmt = (ElementIteratorStatement) iterStmt;
            ElementContainerStore backingStore = (ElementContainerStore) iterStmt.getBackingStore();
            if (backingStore.isElementsAreEmbedded() || backingStore.isElementsAreSerialised()) {
                int[] param = new int[backingStore.getElementMapping().getNumberOfColumnMappings()];
                for (int i = 0; i < param.length; ++i) {
                    param[i] = i + 1;
                }
                if (backingStore.getElementMapping() instanceof SerialisedPCMapping || backingStore.getElementMapping() instanceof SerialisedReferenceMapping || backingStore.getElementMapping() instanceof EmbeddedElementPCMapping) {
                    // Element = Serialised
                    while (rs.next()) {
                        Object owner = iterStmt.getOwnerMapIndex().getMapping().getObject(ec, rs, iterStmt.getOwnerMapIndex().getColumnPositions());
                        Object element = backingStore.getElementMapping().getObject(ec, rs, param, ec.findStateManager(owner), backingStore.getOwnerMemberMetaData().getAbsoluteFieldNumber());
                        addOwnerMemberCollectionElement(mmd, owner, element);
                    }
                } else {
                    // Element = Non-PC
                    while (rs.next()) {
                        Object owner = iterStmt.getOwnerMapIndex().getMapping().getObject(ec, rs, iterStmt.getOwnerMapIndex().getColumnPositions());
                        Object element = backingStore.getElementMapping().getObject(ec, rs, param);
                        addOwnerMemberCollectionElement(mmd, owner, element);
                    }
                }
            } else if (backingStore.getElementMapping() instanceof ReferenceMapping) {
                // Element is Reference (interface/Object) so just use elementMapping
                int[] param = new int[backingStore.getElementMapping().getNumberOfColumnMappings()];
                for (int i = 0; i < param.length; ++i) {
                    param[i] = i + 1;
                }
                while (rs.next()) {
                    Object owner = iterStmt.getOwnerMapIndex().getMapping().getObject(ec, rs, iterStmt.getOwnerMapIndex().getColumnPositions());
                    Object element = backingStore.getElementMapping().getObject(ec, rs, param);
                    addOwnerMemberCollectionElement(mmd, owner, element);
                }
            } else {
                String elementType = mmd.hasCollection() ? backingStore.getOwnerMemberMetaData().getCollection().getElementType() : backingStore.getOwnerMemberMetaData().getArray().getElementType();
                ResultObjectFactory<E> scoROF = new PersistentClassROF(ec, rs, query.getIgnoreCache(), fp, elemIterStmt.getElementClassMapping(), backingStore.getElementClassMetaData(), ec.getClassLoaderResolver().classForName(elementType));
                while (rs.next()) {
                    Object owner = iterStmt.getOwnerMapIndex().getMapping().getObject(ec, rs, iterStmt.getOwnerMapIndex().getColumnPositions());
                    Object element = scoROF.getObject();
                    addOwnerMemberCollectionElement(mmd, owner, element);
                }
            }
        } else if (mmd.hasMap()) {
        // TODO Cater for maps
        }
    } catch (SQLException sqle) {
        NucleusLogger.DATASTORE.error("Exception thrown processing bulk loaded field " + iterStmt.getBackingStore().getOwnerMemberMetaData().getFullFieldName(), sqle);
    } finally {
        // Close the ResultSet (and its Statement)
        try {
            Statement stmt = null;
            try {
                stmt = rs.getStatement();
                // Close the result set
                rs.close();
            } catch (SQLException e) {
                NucleusLogger.DATASTORE.error(Localiser.msg("052605", e));
            } finally {
                try {
                    if (stmt != null) {
                        // Close the original statement
                        stmt.close();
                    }
                } catch (SQLException e) {
                // Do nothing
                }
            }
        } finally {
            rs = null;
        }
    }
}