Examples with Expression org.hibernate.sql.ast.tree.expression.Expression used on opensource projects

Example 51 with Expression

use of org.hibernate.sql.ast.tree.expression.Expression in project hibernate-orm by hibernate.

the class BaseSqmToSqlAstConverter method visitTableGroup.

private Expression visitTableGroup(TableGroup tableGroup, SqmFrom<?, ?> path) {
    final ModelPartContainer modelPart;
    final MappingModelExpressible<?> inferredValueMapping = getInferredValueMapping();
    // For plain SqmFrom node uses, prefer the mapping type from the context if possible
    if (!(inferredValueMapping instanceof ModelPartContainer)) {
        modelPart = tableGroup.getModelPart();
    } else {
        modelPart = (ModelPartContainer) inferredValueMapping;
    }
    final ModelPart resultModelPart;
    final ModelPart interpretationModelPart;
    final TableGroup parentGroupToUse;
    if (modelPart instanceof ToOneAttributeMapping) {
        final ToOneAttributeMapping toOneAttributeMapping = (ToOneAttributeMapping) modelPart;
        final ModelPart targetPart = toOneAttributeMapping.getForeignKeyDescriptor().getPart(toOneAttributeMapping.getSideNature().inverse());
        if (tableGroup.getModelPart().getPartMappingType() == modelPart.getPartMappingType()) {
            resultModelPart = targetPart;
        } else {
            // If the table group is for a different mapping type i.e. an inheritance subtype,
            // lookup the target part on that mapping type
            resultModelPart = tableGroup.getModelPart().findSubPart(targetPart.getPartName(), null);
        }
        interpretationModelPart = modelPart;
        parentGroupToUse = null;
    } else if (modelPart instanceof PluralAttributeMapping) {
        final PluralAttributeMapping pluralAttributeMapping = (PluralAttributeMapping) modelPart;
        final CollectionPart elementDescriptor = pluralAttributeMapping.getElementDescriptor();
        if (elementDescriptor instanceof EntityCollectionPart) {
            // Usually, we need to resolve to the PK for visitTableGroup
            final EntityCollectionPart collectionPart = (EntityCollectionPart) elementDescriptor;
            final ModelPart collectionTargetPart = collectionPart.getForeignKeyDescriptor().getPart(collectionPart.getSideNature().inverse());
            final EntityIdentifierMapping identifierMapping = collectionPart.getEntityMappingType().getIdentifierMapping();
            // If the FK points to the PK, we can use the FK part though, if this is not a root
            if (collectionTargetPart == identifierMapping && !(path instanceof SqmRoot<?>)) {
                resultModelPart = collectionPart.getForeignKeyDescriptor().getPart(collectionPart.getSideNature());
            } else {
                resultModelPart = identifierMapping;
            }
        } else {
            resultModelPart = elementDescriptor;
        }
        interpretationModelPart = elementDescriptor;
        parentGroupToUse = null;
    } else if (modelPart instanceof EntityCollectionPart) {
        // Usually, we need to resolve to the PK for visitTableGroup
        final EntityCollectionPart collectionPart = (EntityCollectionPart) modelPart;
        final ModelPart collectionTargetPart = collectionPart.getForeignKeyDescriptor().getPart(collectionPart.getSideNature().inverse());
        final EntityIdentifierMapping identifierMapping = collectionPart.getEntityMappingType().getIdentifierMapping();
        // If the FK points to the PK, we can use the FK part though, if this is not a root
        if (collectionTargetPart == identifierMapping && !(path instanceof SqmRoot<?>)) {
            resultModelPart = collectionPart.getForeignKeyDescriptor().getPart(collectionPart.getSideNature());
        } else {
            resultModelPart = identifierMapping;
        }
        interpretationModelPart = modelPart;
        parentGroupToUse = findTableGroup(tableGroup.getNavigablePath().getParent());
    } else if (modelPart instanceof EntityMappingType) {
        resultModelPart = ((EntityMappingType) modelPart).getIdentifierMapping();
        interpretationModelPart = modelPart;
        // todo: I think this will always be null anyways because EntityMappingType will only be the model part
        // of a TableGroup if that is a root TableGroup, so check if we can just switch to null
        parentGroupToUse = findTableGroup(tableGroup.getNavigablePath().getParent());
    } else {
        resultModelPart = modelPart;
        interpretationModelPart = modelPart;
        parentGroupToUse = null;
    }
    final NavigablePath navigablePath;
    if (interpretationModelPart == modelPart) {
        navigablePath = tableGroup.getNavigablePath();
    } else {
        navigablePath = tableGroup.getNavigablePath().append(interpretationModelPart.getPartName());
    }
    final Expression result;
    if (interpretationModelPart instanceof EntityValuedModelPart) {
        final boolean expandToAllColumns;
        if (currentClauseStack.getCurrent() == Clause.GROUP) {
            // When the table group is known to be fetched i.e. a fetch join
            // but also when the from clause is part of the select clause
            // we need to expand to all columns, as we also expand this to all columns in the select clause
            expandToAllColumns = tableGroup.isFetched() || selectClauseContains(path);
        } else {
            expandToAllColumns = false;
        }
        final EntityValuedModelPart mapping = (EntityValuedModelPart) interpretationModelPart;
        EntityMappingType mappingType;
        if (path instanceof SqmTreatedPath) {
            mappingType = creationContext.getSessionFactory().getRuntimeMetamodels().getMappingMetamodel().findEntityDescriptor(((SqmTreatedPath<?, ?>) path).getTreatTarget().getHibernateEntityName());
        } else {
            mappingType = mapping.getEntityMappingType();
        }
        result = EntityValuedPathInterpretation.from(navigablePath, parentGroupToUse == null ? tableGroup : parentGroupToUse, expandToAllColumns ? null : resultModelPart, (EntityValuedModelPart) interpretationModelPart, mappingType, this);
    } else if (interpretationModelPart instanceof EmbeddableValuedModelPart) {
        final EmbeddableValuedModelPart mapping = (EmbeddableValuedModelPart) resultModelPart;
        result = new EmbeddableValuedPathInterpretation<>(mapping.toSqlExpression(tableGroup, currentClauseStack.getCurrent(), this, getSqlAstCreationState()), navigablePath, (EmbeddableValuedModelPart) interpretationModelPart, tableGroup);
    } else {
        assert interpretationModelPart instanceof BasicValuedModelPart;
        final BasicValuedModelPart mapping = (BasicValuedModelPart) resultModelPart;
        final TableReference tableReference = tableGroup.resolveTableReference(navigablePath.append(resultModelPart.getPartName()), mapping.getContainingTableExpression());
        final Expression expression = getSqlExpressionResolver().resolveSqlExpression(SqlExpressionResolver.createColumnReferenceKey(tableReference, mapping.getSelectionExpression()), sacs -> new ColumnReference(tableReference.getIdentificationVariable(), mapping, getCreationContext().getSessionFactory()));
        final ColumnReference columnReference;
        if (expression instanceof ColumnReference) {
            columnReference = (ColumnReference) expression;
        } else if (expression instanceof SqlSelectionExpression) {
            final Expression selectedExpression = ((SqlSelectionExpression) expression).getSelection().getExpression();
            assert selectedExpression instanceof ColumnReference;
            columnReference = (ColumnReference) selectedExpression;
        } else {
            throw new UnsupportedOperationException("Unsupported basic-valued path expression : " + expression);
        }
        result = new BasicValuedPathInterpretation<>(columnReference, navigablePath, (BasicValuedModelPart) interpretationModelPart, tableGroup);
    }
    return withTreatRestriction(result, path);
}

Example 52 with Expression

use of org.hibernate.sql.ast.tree.expression.Expression in project hibernate-orm by hibernate.

the class BaseSqmToSqlAstConverter method createLateralJoinExpression.

protected Expression createLateralJoinExpression(AbstractSqmSpecificPluralPartPath<?> pluralPartPath, boolean index, String functionName) {
    prepareReusablePath(pluralPartPath.getLhs(), () -> null);
    final PluralAttributeMapping pluralAttributeMapping = (PluralAttributeMapping) determineValueMapping(pluralPartPath.getPluralDomainPath());
    final FromClauseAccess parentFromClauseAccess = getFromClauseAccess();
    final TableGroup parentTableGroup = parentFromClauseAccess.findTableGroup(pluralPartPath.getNavigablePath().getParent());
    final CollectionPart collectionPart = index ? pluralAttributeMapping.getIndexDescriptor() : pluralAttributeMapping.getElementDescriptor();
    final ModelPart modelPart;
    if (collectionPart instanceof EntityAssociationMapping) {
        modelPart = ((EntityAssociationMapping) collectionPart).getKeyTargetMatchPart();
    } else {
        modelPart = collectionPart;
    }
    final int jdbcTypeCount = modelPart.getJdbcTypeCount();
    final String pathName = functionName + (index ? "_index" : "_element");
    final String identifierVariable = parentTableGroup.getPrimaryTableReference().getIdentificationVariable() + "_" + pathName;
    final NavigablePath queryPath = new NavigablePath(parentTableGroup.getNavigablePath(), pathName, identifierVariable);
    TableGroup lateralTableGroup = parentFromClauseAccess.findTableGroup(queryPath);
    if (lateralTableGroup == null) {
        final QuerySpec subQuerySpec = new QuerySpec(false);
        pushProcessingState(new SqlAstQueryPartProcessingStateImpl(subQuerySpec, getCurrentProcessingState(), this, currentClauseStack::getCurrent, false));
        try {
            final TableGroup tableGroup = pluralAttributeMapping.createRootTableGroup(true, pluralPartPath.getNavigablePath(), null, () -> subQuerySpec::applyPredicate, this, creationContext);
            pluralAttributeMapping.applyBaseRestrictions(subQuerySpec::applyPredicate, tableGroup, true, getLoadQueryInfluencers().getEnabledFilters(), null, this);
            getFromClauseAccess().registerTableGroup(pluralPartPath.getNavigablePath(), tableGroup);
            registerPluralTableGroupParts(tableGroup);
            subQuerySpec.getFromClause().addRoot(tableGroup);
            final List<String> columnNames = new ArrayList<>(jdbcTypeCount);
            final List<ColumnReference> resultColumnReferences = new ArrayList<>(jdbcTypeCount);
            final NavigablePath navigablePath = pluralPartPath.getNavigablePath();
            final Boolean max = functionName.equalsIgnoreCase("max") ? Boolean.TRUE : (functionName.equalsIgnoreCase("min") ? Boolean.FALSE : null);
            final AbstractSqmSelfRenderingFunctionDescriptor functionDescriptor = (AbstractSqmSelfRenderingFunctionDescriptor) creationContext.getSessionFactory().getQueryEngine().getSqmFunctionRegistry().findFunctionDescriptor(functionName);
            final List<ColumnReference> subQueryColumns = new ArrayList<>(jdbcTypeCount);
            modelPart.forEachSelectable((selectionIndex, selectionMapping) -> {
                final ColumnReference columnReference = new ColumnReference(tableGroup.resolveTableReference(navigablePath, selectionMapping.getContainingTableExpression()), selectionMapping, creationContext.getSessionFactory());
                final String columnName;
                if (selectionMapping.isFormula()) {
                    columnName = "col" + columnNames.size();
                } else {
                    columnName = selectionMapping.getSelectionExpression();
                }
                columnNames.add(columnName);
                subQueryColumns.add(columnReference);
                if (max != null) {
                    subQuerySpec.addSortSpecification(new SortSpecification(columnReference, max ? SortOrder.DESCENDING : SortOrder.ASCENDING));
                }
            });
            if (max != null) {
                for (int i = 0; i < subQueryColumns.size(); i++) {
                    subQuerySpec.getSelectClause().addSqlSelection(new SqlSelectionImpl(i + 1, i, subQueryColumns.get(i)));
                    resultColumnReferences.add(new ColumnReference(identifierVariable, columnNames.get(i), false, null, null, subQueryColumns.get(i).getJdbcMapping(), creationContext.getSessionFactory()));
                }
                subQuerySpec.setFetchClauseExpression(new QueryLiteral<>(1, basicType(Integer.class)), FetchClauseType.ROWS_ONLY);
            } else {
                final List<? extends SqlAstNode> arguments;
                if (jdbcTypeCount == 1) {
                    arguments = subQueryColumns;
                } else {
                    arguments = Collections.singletonList(new SqlTuple(subQueryColumns, modelPart));
                }
                final Expression expression = new SelfRenderingAggregateFunctionSqlAstExpression(functionDescriptor.getName(), functionDescriptor, arguments, null, (ReturnableType<?>) functionDescriptor.getReturnTypeResolver().resolveFunctionReturnType(() -> null, arguments).getJdbcMapping(), modelPart);
                subQuerySpec.getSelectClause().addSqlSelection(new SqlSelectionImpl(1, 0, expression));
                resultColumnReferences.add(new ColumnReference(identifierVariable, columnNames.get(0), false, null, null, expression.getExpressionType().getJdbcMappings().get(0), creationContext.getSessionFactory()));
            }
            subQuerySpec.applyPredicate(pluralAttributeMapping.getKeyDescriptor().generateJoinPredicate(parentFromClauseAccess.findTableGroup(pluralPartPath.getPluralDomainPath().getNavigablePath().getParent()), tableGroup, getSqlExpressionResolver(), creationContext));
            final String compatibleTableExpression;
            if (modelPart instanceof BasicValuedModelPart) {
                compatibleTableExpression = ((BasicValuedModelPart) modelPart).getContainingTableExpression();
            } else if (modelPart instanceof EmbeddableValuedModelPart) {
                compatibleTableExpression = ((EmbeddableValuedModelPart) modelPart).getContainingTableExpression();
            } else {
                compatibleTableExpression = null;
            }
            lateralTableGroup = new QueryPartTableGroup(queryPath, null, subQuerySpec, identifierVariable, columnNames, compatibleTableExpression, true, false, creationContext.getSessionFactory());
            if (currentlyProcessingJoin == null) {
                parentTableGroup.addTableGroupJoin(new TableGroupJoin(lateralTableGroup.getNavigablePath(), SqlAstJoinType.LEFT, lateralTableGroup));
            } else {
                // In case this is used in the ON condition, we must prepend this lateral join
                final TableGroup targetTableGroup;
                if (currentlyProcessingJoin.getLhs() == null) {
                    targetTableGroup = parentFromClauseAccess.getTableGroup(currentlyProcessingJoin.findRoot().getNavigablePath());
                } else {
                    targetTableGroup = parentFromClauseAccess.getTableGroup(currentlyProcessingJoin.getLhs().getNavigablePath());
                }
                // Many databases would support modelling this as nested table group join,
                // but at least SQL Server doesn't like that, saying that the correlated columns can't be "bound"
                // Since there is no dependency on the currentlyProcessingJoin, we can safely prepend this join
                targetTableGroup.prependTableGroupJoin(currentlyProcessingJoin.getNavigablePath(), new TableGroupJoin(lateralTableGroup.getNavigablePath(), SqlAstJoinType.LEFT, lateralTableGroup));
            }
            parentFromClauseAccess.registerTableGroup(lateralTableGroup.getNavigablePath(), lateralTableGroup);
            if (jdbcTypeCount == 1) {
                return new SelfRenderingFunctionSqlAstExpression(pathName, (sqlAppender, sqlAstArguments, walker) -> {
                    sqlAstArguments.get(0).accept(walker);
                }, resultColumnReferences, (ReturnableType<?>) resultColumnReferences.get(0).getJdbcMapping(), resultColumnReferences.get(0).getJdbcMapping());
            } else {
                return new SqlTuple(resultColumnReferences, modelPart);
            }
        } finally {
            popProcessingStateStack();
        }
    }
    final QueryPartTableReference tableReference = (QueryPartTableReference) lateralTableGroup.getPrimaryTableReference();
    if (jdbcTypeCount == 1) {
        final List<SqlSelection> sqlSelections = tableReference.getQueryPart().getFirstQuerySpec().getSelectClause().getSqlSelections();
        return new SelfRenderingFunctionSqlAstExpression(pathName, (sqlAppender, sqlAstArguments, walker) -> {
            sqlAstArguments.get(0).accept(walker);
        }, Collections.singletonList(new ColumnReference(identifierVariable, tableReference.getColumnNames().get(0), false, null, null, sqlSelections.get(0).getExpressionType().getJdbcMappings().get(0), creationContext.getSessionFactory())), (ReturnableType<?>) sqlSelections.get(0).getExpressionType().getJdbcMappings().get(0), sqlSelections.get(0).getExpressionType());
    } else {
        final List<ColumnReference> resultColumnReferences = new ArrayList<>(jdbcTypeCount);
        modelPart.forEachSelectable((selectionIndex, selectionMapping) -> resultColumnReferences.add(new ColumnReference(identifierVariable, tableReference.getColumnNames().get(selectionIndex), false, null, null, selectionMapping.getJdbcMapping(), creationContext.getSessionFactory())));
        return new SqlTuple(resultColumnReferences, modelPart);
    }
}

Example 53 with Expression

use of org.hibernate.sql.ast.tree.expression.Expression in project hibernate-orm by hibernate.

the class BaseSqmToSqlAstConverter method visitSimpleCaseExpression.

@Override
public CaseSimpleExpression visitSimpleCaseExpression(SqmCaseSimple<?, ?> expression) {
    final List<CaseSimpleExpression.WhenFragment> whenFragments = new ArrayList<>(expression.getWhenFragments().size());
    final Supplier<MappingModelExpressible<?>> inferenceSupplier = inferrableTypeAccessStack.getCurrent();
    inferrableTypeAccessStack.push(() -> {
        for (SqmCaseSimple.WhenFragment<?, ?> whenFragment : expression.getWhenFragments()) {
            final MappingModelExpressible<?> resolved = determineCurrentExpressible(whenFragment.getCheckValue());
            if (resolved != null) {
                return resolved;
            }
        }
        return null;
    });
    final Expression fixture = (Expression) expression.getFixture().accept(this);
    final MappingModelExpressible<?> fixtureType = (MappingModelExpressible<?>) fixture.getExpressionType();
    inferrableTypeAccessStack.pop();
    MappingModelExpressible<?> resolved = determineCurrentExpressible(expression);
    Expression otherwise = null;
    for (SqmCaseSimple.WhenFragment<?, ?> whenFragment : expression.getWhenFragments()) {
        inferrableTypeAccessStack.push(() -> fixtureType);
        final Expression checkValue = (Expression) whenFragment.getCheckValue().accept(this);
        inferrableTypeAccessStack.pop();
        final MappingModelExpressible<?> alreadyKnown = resolved;
        inferrableTypeAccessStack.push(() -> alreadyKnown == null && inferenceSupplier != null ? inferenceSupplier.get() : alreadyKnown);
        final Expression resultExpression = (Expression) whenFragment.getResult().accept(this);
        inferrableTypeAccessStack.pop();
        resolved = (MappingModelExpressible<?>) highestPrecedence(resolved, resultExpression.getExpressionType());
        whenFragments.add(new CaseSimpleExpression.WhenFragment(checkValue, resultExpression));
    }
    if (expression.getOtherwise() != null) {
        final MappingModelExpressible<?> alreadyKnown = resolved;
        inferrableTypeAccessStack.push(() -> alreadyKnown == null && inferenceSupplier != null ? inferenceSupplier.get() : alreadyKnown);
        otherwise = (Expression) expression.getOtherwise().accept(this);
        inferrableTypeAccessStack.pop();
        resolved = (MappingModelExpressible<?>) highestPrecedence(resolved, otherwise.getExpressionType());
    }
    return new CaseSimpleExpression(resolved, fixture, whenFragments, otherwise);
}

Example 54 with Expression

use of org.hibernate.sql.ast.tree.expression.Expression in project hibernate-orm by hibernate.

the class BaseSqmToSqlAstConverter method visitInsertionTargetPaths.

public AdditionalInsertValues visitInsertionTargetPaths(BiConsumer<Assignable, List<ColumnReference>> targetColumnReferenceConsumer, SqmInsertStatement<?> sqmStatement, EntityPersister entityDescriptor, TableGroup rootTableGroup) {
    final List<SqmPath<?>> targetPaths = sqmStatement.getInsertionTargetPaths();
    final EntityDiscriminatorMapping discriminatorMapping = entityDescriptor.getDiscriminatorMapping();
    IdentifierGenerator identifierGenerator = entityDescriptor.getIdentifierGenerator();
    Expression versionExpression = null;
    Expression discriminatorExpression = null;
    BasicEntityIdentifierMapping identifierMapping = null;
    // We use the id property name to null the identifier generator variable if the target paths contain the id
    final String identifierPropertyName;
    if (identifierGenerator != null) {
        identifierPropertyName = entityDescriptor.getIdentifierPropertyName();
    } else {
        identifierPropertyName = null;
    }
    final String versionAttributeName;
    boolean needsVersionInsert;
    if (entityDescriptor.isVersioned()) {
        versionAttributeName = entityDescriptor.getVersionMapping().getVersionAttribute().getAttributeName();
        needsVersionInsert = true;
    } else {
        versionAttributeName = null;
        needsVersionInsert = false;
    }
    // Go through all target paths and remember if the target paths contain the version or id attributes
    for (int i = 0; i < targetPaths.size(); i++) {
        final SqmPath<?> path = targetPaths.get(i);
        final String localName = path.getNavigablePath().getLocalName();
        if (localName.equals(identifierPropertyName)) {
            identifierGenerator = null;
        } else if (localName.equals(versionAttributeName)) {
            needsVersionInsert = false;
        }
        final Assignable assignable = (Assignable) path.accept(this);
        targetColumnReferenceConsumer.accept(assignable, assignable.getColumnReferences());
    }
    if (needsVersionInsert) {
        final BasicValuedPathInterpretation<?> versionPath = BasicValuedPathInterpretation.from((SqmBasicValuedSimplePath<?>) sqmStatement.getTarget().get(versionAttributeName), this, this, jpaQueryComplianceEnabled);
        final List<ColumnReference> targetColumnReferences = versionPath.getColumnReferences();
        assert targetColumnReferences.size() == 1;
        targetColumnReferenceConsumer.accept(versionPath, targetColumnReferences);
        versionExpression = new VersionTypeSeedParameterSpecification(entityDescriptor.getVersionMapping().getJdbcMapping(), entityDescriptor.getVersionJavaType());
    }
    if (discriminatorMapping != null && discriminatorMapping.isPhysical()) {
        final BasicValuedPathInterpretation<?> discriminatorPath = new BasicValuedPathInterpretation<>(new ColumnReference(rootTableGroup.resolveTableReference(discriminatorMapping.getContainingTableExpression()), discriminatorMapping, getCreationContext().getSessionFactory()), rootTableGroup.getNavigablePath().append(discriminatorMapping.getPartName()), discriminatorMapping, rootTableGroup);
        targetColumnReferenceConsumer.accept(discriminatorPath, discriminatorPath.getColumnReferences());
        discriminatorExpression = new QueryLiteral<>(entityDescriptor.getDiscriminatorValue(), discriminatorMapping);
    }
    // This uses identity generation, so we don't need to list the column
    if (identifierGenerator instanceof PostInsertIdentifierGenerator || identifierGenerator instanceof CompositeNestedGeneratedValueGenerator) {
        identifierGenerator = null;
    } else if (identifierGenerator != null) {
        identifierMapping = (BasicEntityIdentifierMapping) entityDescriptor.getIdentifierMapping();
        final BasicValuedPathInterpretation<?> identifierPath = new BasicValuedPathInterpretation<>(new ColumnReference(rootTableGroup.resolveTableReference(identifierMapping.getContainingTableExpression()), identifierMapping, getCreationContext().getSessionFactory()), rootTableGroup.getNavigablePath().append(identifierMapping.getPartName()), identifierMapping, rootTableGroup);
        targetColumnReferenceConsumer.accept(identifierPath, identifierPath.getColumnReferences());
    }
    return new AdditionalInsertValues(versionExpression, discriminatorExpression, identifierGenerator, identifierMapping);
}

Example 55 with Expression

use of org.hibernate.sql.ast.tree.expression.Expression in project hibernate-orm by hibernate.

the class BaseSqmToSqlAstConverter method visitQuerySpec.

@Override
public QuerySpec visitQuerySpec(SqmQuerySpec<?> sqmQuerySpec) {
    final boolean topLevel = getProcessingStateStack().isEmpty();
    final QuerySpec sqlQuerySpec = new QuerySpec(topLevel, sqmQuerySpec.getFromClause().getNumberOfRoots());
    final SqmSelectClause selectClause = sqmQuerySpec.getSelectClause();
    final Predicate originalAdditionalRestrictions = additionalRestrictions;
    additionalRestrictions = null;
    final boolean trackAliasedNodePositions;
    if (trackSelectionsForGroup) {
        trackAliasedNodePositions = true;
    } else if (sqmQuerySpec.getOrderByClause() != null && sqmQuerySpec.getOrderByClause().hasPositionalSortItem()) {
        trackAliasedNodePositions = true;
    } else if (sqmQuerySpec.hasPositionalGroupItem()) {
        trackAliasedNodePositions = true;
    } else {
        // Since JPA Criteria queries can use the same expression object in order or group by items,
        // we need to track the positions to be able to replace the expression in the items with alias references
        // Also see #resolveGroupOrOrderByExpression for more details
        trackAliasedNodePositions = statement.getQuerySource() == SqmQuerySource.CRITERIA && (sqmQuerySpec.getOrderByClause() != null || !sqmQuerySpec.getGroupByClauseExpressions().isEmpty());
    }
    final SqlAstProcessingState processingState;
    if (trackAliasedNodePositions) {
        processingState = new SqlAstQueryPartProcessingStateImpl(sqlQuerySpec, getCurrentProcessingState(), this, r -> new SqmAliasedNodePositionTracker(r, selectClause.getSelections()), currentClauseStack::getCurrent, deduplicateSelectionItems);
    } else {
        processingState = new SqlAstQueryPartProcessingStateImpl(sqlQuerySpec, getCurrentProcessingState(), this, currentClauseStack::getCurrent, deduplicateSelectionItems);
    }
    final SqmQueryPart<?> sqmQueryPart = currentSqmQueryPart;
    final boolean originalDeduplicateSelectionItems = deduplicateSelectionItems;
    currentSqmQueryPart = sqmQuerySpec;
    // In sub-queries, we can never deduplicate the selection items as that might change semantics
    deduplicateSelectionItems = false;
    pushProcessingState(processingState);
    queryTransformers.push(new ArrayList<>());
    try {
        // we want to visit the from-clause first
        visitFromClause(sqmQuerySpec.getFromClause());
        visitSelectClause(selectClause);
        final SqmWhereClause whereClause = sqmQuerySpec.getWhereClause();
        if (whereClause != null) {
            sqlQuerySpec.applyPredicate(visitWhereClause(whereClause.getPredicate()));
        }
        sqlQuerySpec.setGroupByClauseExpressions(visitGroupByClause(sqmQuerySpec.getGroupByClauseExpressions()));
        if (sqmQuerySpec.getHavingClausePredicate() != null) {
            sqlQuerySpec.setHavingClauseRestrictions(visitHavingClause(sqmQuerySpec.getHavingClausePredicate()));
        }
        visitOrderByOffsetAndFetch(sqmQuerySpec, sqlQuerySpec);
        if (topLevel && statement instanceof SqmSelectStatement<?>) {
            if (orderByFragments != null) {
                orderByFragments.forEach(entry -> entry.getKey().apply(sqlQuerySpec, entry.getValue(), this));
                orderByFragments = null;
            }
            applyCollectionFilterPredicates(sqlQuerySpec);
        }
        QuerySpec finalQuerySpec = sqlQuerySpec;
        for (QueryTransformer transformer : queryTransformers.getCurrent()) {
            finalQuerySpec = transformer.transform(cteContainer, finalQuerySpec, this);
        }
        return finalQuerySpec;
    } finally {
        if (additionalRestrictions != null) {
            sqlQuerySpec.applyPredicate(additionalRestrictions);
        }
        additionalRestrictions = originalAdditionalRestrictions;
        popProcessingStateStack();
        queryTransformers.pop();
        currentSqmQueryPart = sqmQueryPart;
        deduplicateSelectionItems = originalDeduplicateSelectionItems;
    }
}