Examples with FromClauseAccess org.hibernate.sql.ast.spi.FromClauseAccess used on opensource projects

Example 1 with FromClauseAccess

use of org.hibernate.sql.ast.spi.FromClauseAccess in project hibernate-orm by hibernate.

the class ToOneAttributeMapping method createCircularBiDirectionalFetch.

private Fetch createCircularBiDirectionalFetch(NavigablePath fetchablePath, FetchParent fetchParent, NavigablePath parentNavigablePath, DomainResultCreationState creationState) {
    final NavigablePath referencedNavigablePath;
    final boolean hasBidirectionalFetchParent;
    FetchParent realFetchParent = fetchParent;
    // Traverse up the embeddable fetches
    while (realFetchParent.getNavigablePath() != parentNavigablePath) {
        realFetchParent = ((Fetch) fetchParent).getFetchParent();
    }
    if (parentNavigablePath.getParent() == null) {
        referencedNavigablePath = parentNavigablePath;
        hasBidirectionalFetchParent = true;
    } else if (CollectionPart.Nature.fromNameExact(parentNavigablePath.getUnaliasedLocalName()) != null) {
        referencedNavigablePath = parentNavigablePath.getParent().getParent();
        hasBidirectionalFetchParent = fetchParent instanceof Fetch && ((Fetch) fetchParent).getFetchParent() instanceof Fetch;
    } else {
        referencedNavigablePath = parentNavigablePath.getParent();
        hasBidirectionalFetchParent = fetchParent instanceof Fetch;
    }
    // The referencedNavigablePath can be null if this is a collection initialization
    if (referencedNavigablePath != null) {
        if (hasBidirectionalFetchParent) {
            // If this is the key side, we must ensure that the key is not null, so we create a domain result for it
            // In the CircularBiDirectionalFetchImpl we return null if the key is null instead of the bidirectional value
            final DomainResult<?> keyDomainResult;
            // For now, we don't do this if the key table is nullable to avoid an additional join
            if (sideNature == ForeignKeyDescriptor.Nature.KEY && !isKeyTableNullable) {
                keyDomainResult = foreignKeyDescriptor.createKeyDomainResult(fetchablePath, creationState.getSqlAstCreationState().getFromClauseAccess().findTableGroup(realFetchParent.getNavigablePath()), creationState);
            } else {
                keyDomainResult = null;
            }
            return new CircularBiDirectionalFetchImpl(FetchTiming.IMMEDIATE, fetchablePath, fetchParent, this, LockMode.READ, referencedNavigablePath, keyDomainResult);
        } else {
            // A query like `select ch from Phone p join p.callHistory ch` returns collection element domain results
            // but detects that Call#phone is bidirectional in the query.
            // The problem with a bidirectional fetch though is that we can't find an initializer
            // because there is none, as we don't fetch the data of the parent node.
            // To avoid creating another join, we create a special join fetch that uses the existing joined data
            final FromClauseAccess fromClauseAccess = creationState.getSqlAstCreationState().getFromClauseAccess();
            final TableGroup tableGroup = fromClauseAccess.getTableGroup(referencedNavigablePath);
            fromClauseAccess.registerTableGroup(fetchablePath, tableGroup);
            return new EntityFetchJoinedImpl(fetchParent, this, tableGroup, fetchablePath, creationState);
        }
    } else {
        // We get here is this is a lazy collection initialization for which we know the owner is in the PC
        // So we create a delayed fetch, as we are sure to find the entity in the PC
        final FromClauseAccess fromClauseAccess = creationState.getSqlAstCreationState().getFromClauseAccess();
        final NavigablePath realParent;
        if (CollectionPart.Nature.fromNameExact(parentNavigablePath.getUnaliasedLocalName()) != null) {
            realParent = parentNavigablePath.getParent();
        } else {
            realParent = parentNavigablePath;
        }
        final TableGroup tableGroup = fromClauseAccess.getTableGroup(realParent);
        return new EntityDelayedFetchImpl(fetchParent, this, fetchablePath, foreignKeyDescriptor.createDomainResult(fetchablePath, tableGroup, sideNature, creationState), isSelectByUniqueKey(sideNature));
    }
}

Example 2 with FromClauseAccess

use of org.hibernate.sql.ast.spi.FromClauseAccess in project hibernate-orm by hibernate.

the class ToOneAttributeMapping method generateFetch.

@Override
public EntityFetch generateFetch(FetchParent fetchParent, NavigablePath fetchablePath, FetchTiming fetchTiming, boolean selected, String resultVariable, DomainResultCreationState creationState) {
    final SqlAstCreationState sqlAstCreationState = creationState.getSqlAstCreationState();
    final FromClauseAccess fromClauseAccess = sqlAstCreationState.getFromClauseAccess();
    final TableGroup parentTableGroup = fromClauseAccess.getTableGroup(fetchParent.getNavigablePath());
    final NavigablePath parentNavigablePath = fetchablePath.getParent();
    assert parentNavigablePath.equals(fetchParent.getNavigablePath()) || fetchParent.getNavigablePath() instanceof TreatedNavigablePath && parentNavigablePath.equals(fetchParent.getNavigablePath().getRealParent());
    if (fetchTiming == FetchTiming.IMMEDIATE && selected) {
        final TableGroup tableGroup;
        if (fetchParent instanceof EntityResultJoinedSubclassImpl && ((EntityPersister) fetchParent.getReferencedModePart()).findDeclaredAttributeMapping(getPartName()) == null) {
            final TableGroupJoin tableGroupJoin = createTableGroupJoin(fetchablePath, parentTableGroup, resultVariable, getJoinType(fetchablePath, parentTableGroup), true, false, creationState.getSqlAstCreationState());
            parentTableGroup.addTableGroupJoin(tableGroupJoin);
            tableGroup = tableGroupJoin.getJoinedGroup();
            fromClauseAccess.registerTableGroup(fetchablePath, tableGroup);
        } else {
            tableGroup = fromClauseAccess.resolveTableGroup(fetchablePath, np -> {
                final TableGroupJoin tableGroupJoin = createTableGroupJoin(fetchablePath, parentTableGroup, resultVariable, getDefaultSqlAstJoinType(parentTableGroup), true, false, creationState.getSqlAstCreationState());
                parentTableGroup.addTableGroupJoin(tableGroupJoin);
                return tableGroupJoin.getJoinedGroup();
            });
        }
        final boolean added = creationState.registerVisitedAssociationKey(foreignKeyDescriptor.getAssociationKey());
        AssociationKey additionalAssociationKey = null;
        if (cardinality == Cardinality.LOGICAL_ONE_TO_ONE && bidirectionalAttributeName != null) {
            final ModelPart bidirectionalModelPart = entityMappingType.findSubPart(bidirectionalAttributeName);
            // Add the inverse association key side as well to be able to resolve to a CircularFetch
            if (bidirectionalModelPart instanceof ToOneAttributeMapping) {
                assert bidirectionalModelPart.getPartMappingType() == declaringTableGroupProducer;
                final ToOneAttributeMapping bidirectionalAttribute = (ToOneAttributeMapping) bidirectionalModelPart;
                final AssociationKey secondKey = bidirectionalAttribute.getForeignKeyDescriptor().getAssociationKey();
                if (creationState.registerVisitedAssociationKey(secondKey)) {
                    additionalAssociationKey = secondKey;
                }
            }
        }
        final EntityFetchJoinedImpl entityFetchJoined = new EntityFetchJoinedImpl(fetchParent, this, tableGroup, fetchablePath, creationState);
        if (added) {
            creationState.removeVisitedAssociationKey(foreignKeyDescriptor.getAssociationKey());
        }
        if (additionalAssociationKey != null) {
            creationState.removeVisitedAssociationKey(additionalAssociationKey);
        }
        return entityFetchJoined;
    }
    /*
			1. No JoinTable
				Model:
					EntityA{
						@ManyToOne
						EntityB b
					}

					EntityB{
						@ManyToOne
						EntityA a
					}

				Relational:
					ENTITY_A( id )
					ENTITY_B( id, entity_a_id)

				1.1 EntityA -> EntityB : as keyResult we need ENTITY_B.id
				1.2 EntityB -> EntityA : as keyResult we need ENTITY_B.entity_a_id (FK referring column)

			2. JoinTable

		 */
    final ForeignKeyDescriptor.Nature resolvingKeySideOfForeignKey = creationState.getCurrentlyResolvingForeignKeyPart();
    final ForeignKeyDescriptor.Nature side;
    if (resolvingKeySideOfForeignKey == ForeignKeyDescriptor.Nature.KEY && this.sideNature == ForeignKeyDescriptor.Nature.TARGET) {
        // If we are currently resolving the key part of a foreign key we do not want to add joins.
        // So if the lhs of this association is the target of the FK, we have to use the KEY part to avoid a join
        side = ForeignKeyDescriptor.Nature.KEY;
    } else {
        side = this.sideNature;
    }
    final DomainResult<?> keyResult = foreignKeyDescriptor.createDomainResult(fetchablePath, parentTableGroup, side, creationState);
    final boolean selectByUniqueKey = isSelectByUniqueKey(side);
    if (fetchTiming == FetchTiming.IMMEDIATE) {
        return new EntityFetchSelectImpl(fetchParent, this, fetchablePath, keyResult, selectByUniqueKey, creationState);
    }
    return new EntityDelayedFetchImpl(fetchParent, this, fetchablePath, keyResult, selectByUniqueKey);
}

Example 3 with FromClauseAccess

use of org.hibernate.sql.ast.spi.FromClauseAccess in project hibernate-orm by hibernate.

the class ToOneAttributeMapping method createTableGroupJoin.

@Override
public TableGroupJoin createTableGroupJoin(NavigablePath navigablePath, TableGroup lhs, String explicitSourceAlias, SqlAstJoinType requestedJoinType, boolean fetched, boolean addsPredicate, SqlAliasBaseGenerator aliasBaseGenerator, SqlExpressionResolver sqlExpressionResolver, FromClauseAccess fromClauseAccess, SqlAstCreationContext creationContext) {
    // This is vital for the map key property check that comes next
    assert !(lhs instanceof PluralTableGroup);
    TableGroup parentTableGroup = lhs;
    ModelPartContainer parentContainer = lhs.getModelPart();
    StringBuilder embeddablePathSb = null;
    // Traverse up embeddable table groups until we find a table group for a collection part
    while (!(parentContainer instanceof CollectionPart)) {
        if (parentContainer instanceof EmbeddableValuedModelPart) {
            if (embeddablePathSb == null) {
                embeddablePathSb = new StringBuilder();
            }
            embeddablePathSb.insert(0, parentContainer.getPartName() + ".");
            parentTableGroup = fromClauseAccess.findTableGroup(parentTableGroup.getNavigablePath().getParent());
            parentContainer = parentTableGroup.getModelPart();
        } else {
            break;
        }
    }
    final SqlAstJoinType joinType;
    if (requestedJoinType == null) {
        joinType = SqlAstJoinType.INNER;
    } else {
        joinType = requestedJoinType;
    }
    // we check if this attribute is the map key property to reuse the existing index table group
    if (CollectionPart.Nature.ELEMENT.getName().equals(parentTableGroup.getNavigablePath().getUnaliasedLocalName()) && !addsPredicate && (joinType == SqlAstJoinType.INNER || joinType == SqlAstJoinType.LEFT)) {
        final PluralTableGroup pluralTableGroup = (PluralTableGroup) fromClauseAccess.findTableGroup(parentTableGroup.getNavigablePath().getParent());
        final String indexPropertyName = pluralTableGroup.getModelPart().getIndexMetadata().getIndexPropertyName();
        final String pathName;
        if (embeddablePathSb != null) {
            pathName = embeddablePathSb.append(getAttributeName()).toString();
        } else {
            pathName = getAttributeName();
        }
        if (pathName.equals(indexPropertyName)) {
            final TableGroup indexTableGroup = pluralTableGroup.getIndexTableGroup();
            // If this is the map key property, we can reuse the index table group
            initializeIfNeeded(lhs, requestedJoinType, indexTableGroup);
            return new TableGroupJoin(navigablePath, joinType, new MappedByTableGroup(navigablePath, this, indexTableGroup, fetched, pluralTableGroup, (np, tableExpression) -> {
                if (!canUseParentTableGroup) {
                    return false;
                }
                NavigablePath path = np.getParent();
                // Fast path
                if (path != null && navigablePath.equals(path)) {
                    return targetKeyPropertyNames.contains(np.getUnaliasedLocalName()) && identifyingColumnsTableExpression.equals(tableExpression);
                }
                final StringBuilder sb = new StringBuilder(np.getFullPath().length());
                sb.append(np.getUnaliasedLocalName());
                while (path != null && !navigablePath.equals(path)) {
                    sb.insert(0, '.');
                    sb.insert(0, path.getUnaliasedLocalName());
                    path = path.getParent();
                }
                return path != null && navigablePath.equals(path) && targetKeyPropertyNames.contains(sb.toString()) && identifyingColumnsTableExpression.equals(tableExpression);
            }), null);
        }
    }
    final LazyTableGroup lazyTableGroup = createRootTableGroupJoin(navigablePath, lhs, explicitSourceAlias, requestedJoinType, fetched, null, aliasBaseGenerator, sqlExpressionResolver, fromClauseAccess, creationContext);
    final TableGroupJoin join = new TableGroupJoin(navigablePath, joinType, lazyTableGroup, null);
    final TableReference lhsTableReference = lhs.resolveTableReference(navigablePath, identifyingColumnsTableExpression);
    lazyTableGroup.setTableGroupInitializerCallback(tableGroup -> join.applyPredicate(foreignKeyDescriptor.generateJoinPredicate(sideNature == ForeignKeyDescriptor.Nature.TARGET ? lhsTableReference : tableGroup.getPrimaryTableReference(), sideNature == ForeignKeyDescriptor.Nature.TARGET ? tableGroup.getPrimaryTableReference() : lhsTableReference, sqlExpressionResolver, creationContext)));
    return join;
}

Example 4 with FromClauseAccess

use of org.hibernate.sql.ast.spi.FromClauseAccess in project hibernate-orm by hibernate.

the class CollectionIdentifierDescriptorImpl method generateFetch.

@Override
public Fetch generateFetch(FetchParent fetchParent, NavigablePath fetchablePath, FetchTiming fetchTiming, boolean selected, String resultVariable, DomainResultCreationState creationState) {
    // get the collection TableGroup
    final FromClauseAccess fromClauseAccess = creationState.getSqlAstCreationState().getFromClauseAccess();
    final TableGroup tableGroup = fromClauseAccess.getTableGroup(fetchablePath.getParent());
    final SqlAstCreationState astCreationState = creationState.getSqlAstCreationState();
    final SqlAstCreationContext astCreationContext = astCreationState.getCreationContext();
    final SessionFactoryImplementor sessionFactory = astCreationContext.getSessionFactory();
    final SqlExpressionResolver sqlExpressionResolver = astCreationState.getSqlExpressionResolver();
    final SqlSelection sqlSelection = sqlExpressionResolver.resolveSqlSelection(sqlExpressionResolver.resolveSqlExpression(SqlExpressionResolver.createColumnReferenceKey(tableGroup.getPrimaryTableReference(), columnName), p -> new ColumnReference(tableGroup.getPrimaryTableReference().getIdentificationVariable(), columnName, false, null, null, type, sessionFactory)), type.getJavaTypeDescriptor(), sessionFactory.getTypeConfiguration());
    return new BasicFetch<>(sqlSelection.getValuesArrayPosition(), fetchParent, fetchablePath, this, null, FetchTiming.IMMEDIATE, creationState);
}

Example 5 with FromClauseAccess

use of org.hibernate.sql.ast.spi.FromClauseAccess in project hibernate-orm by hibernate.

the class ConcreteSqmSelectQueryPlan method buildCacheableSqmInterpretation.

private static CacheableSqmInterpretation buildCacheableSqmInterpretation(SqmSelectStatement<?> sqm, DomainParameterXref domainParameterXref, DomainQueryExecutionContext executionContext) {
    final SharedSessionContractImplementor session = executionContext.getSession();
    final SessionFactoryImplementor sessionFactory = session.getFactory();
    final QueryEngine queryEngine = sessionFactory.getQueryEngine();
    final SqmTranslatorFactory sqmTranslatorFactory = queryEngine.getSqmTranslatorFactory();
    final SqmTranslator<SelectStatement> sqmConverter = sqmTranslatorFactory.createSelectTranslator(sqm, executionContext.getQueryOptions(), domainParameterXref, executionContext.getQueryParameterBindings(), executionContext.getSession().getLoadQueryInfluencers(), sessionFactory, true);
    // tableGroupAccess = sqmConverter.getFromClauseAccess();
    final SqmTranslation<SelectStatement> sqmInterpretation = sqmConverter.translate();
    final FromClauseAccess tableGroupAccess = sqmConverter.getFromClauseAccess();
    final JdbcServices jdbcServices = sessionFactory.getJdbcServices();
    final JdbcEnvironment jdbcEnvironment = jdbcServices.getJdbcEnvironment();
    final SqlAstTranslatorFactory sqlAstTranslatorFactory = jdbcEnvironment.getSqlAstTranslatorFactory();
    final SqlAstTranslator<JdbcSelect> selectTranslator = sqlAstTranslatorFactory.buildSelectTranslator(sessionFactory, sqmInterpretation.getSqlAst());
    final Map<QueryParameterImplementor<?>, Map<SqmParameter<?>, List<List<JdbcParameter>>>> jdbcParamsXref = SqmUtil.generateJdbcParamsXref(domainParameterXref, sqmInterpretation::getJdbcParamsBySqmParam);
    final JdbcParameterBindings jdbcParameterBindings = SqmUtil.createJdbcParameterBindings(executionContext.getQueryParameterBindings(), domainParameterXref, jdbcParamsXref, session.getFactory().getRuntimeMetamodels().getMappingMetamodel(), tableGroupAccess::findTableGroup, new SqmParameterMappingModelResolutionAccess() {

        @Override
        @SuppressWarnings("unchecked")
        public <T> MappingModelExpressible<T> getResolvedMappingModelType(SqmParameter<T> parameter) {
            return (MappingModelExpressible<T>) sqmInterpretation.getSqmParameterMappingModelTypeResolutions().get(parameter);
        }
    }, session);
    final JdbcSelect jdbcSelect = selectTranslator.translate(jdbcParameterBindings, executionContext.getQueryOptions());
    return new CacheableSqmInterpretation(sqmInterpretation.getSqlAst(), jdbcSelect, tableGroupAccess, jdbcParamsXref, sqmInterpretation.getSqmParameterMappingModelTypeResolutions(), jdbcParameterBindings);
}