Examples with Statement org.neo4j.kernel.api.Statement used on opensource projects

Example 11 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class IndexStatisticsTest method dropIndex.

private void dropIndex(NewIndexDescriptor index) throws KernelException {
    try (Transaction tx = db.beginTx()) {
        Statement statement = bridge.get();
        statement.schemaWriteOperations().indexDrop(index);
        tx.success();
    }
}

Example 12 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class IndexIT method committedAndTransactionalIndexRulesShouldBeMerged.

@Test
public void committedAndTransactionalIndexRulesShouldBeMerged() throws Exception {
    // GIVEN
    SchemaWriteOperations schemaWriteOperations = schemaWriteOperationsInNewTransaction();
    NewIndexDescriptor existingRule = schemaWriteOperations.indexCreate(SchemaBoundary.map(descriptor));
    commit();
    // WHEN
    Statement statement = statementInNewTransaction(AnonymousContext.AUTH_DISABLED);
    NewIndexDescriptor addedRule = statement.schemaWriteOperations().indexCreate(SchemaDescriptorFactory.forLabel(labelId, 10));
    Set<NewIndexDescriptor> indexRulesInTx = asSet(statement.readOperations().indexesGetForLabel(labelId));
    commit();
    // THEN
    assertEquals(asSet(existingRule, addedRule), indexRulesInTx);
}

Example 13 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class SchemaImpl method getConstraints.

@Override
public Iterable<ConstraintDefinition> getConstraints(RelationshipType type) {
    actions.assertInOpenTransaction();
    try (Statement statement = statementContextSupplier.get()) {
        int typeId = statement.readOperations().relationshipTypeGetForName(type.name());
        if (typeId == KeyReadOperations.NO_SUCH_RELATIONSHIP_TYPE) {
            return emptyList();
        }
        Iterator<ConstraintDescriptor> constraints = statement.readOperations().constraintsGetForRelationshipType(typeId);
        return asConstraintDefinitions(constraints, statement.readOperations());
    }
}

Example 14 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class SchemaImpl method getIndexes.

@Override
public Iterable<IndexDefinition> getIndexes() {
    try (Statement statement = statementContextSupplier.get()) {
        List<IndexDefinition> definitions = new ArrayList<>();
        addDefinitions(definitions, statement.readOperations(), statement.readOperations().indexesGetAll(), false);
        addDefinitions(definitions, statement.readOperations(), statement.readOperations().uniqueIndexesGetAll(), true);
        return definitions;
    }
}

Example 15 with Statement

use of org.neo4j.kernel.api.Statement in project neo4j by neo4j.

the class GraphDatabaseFacade method nodesByLabelAndProperty.

private ResourceIterator<Node> nodesByLabelAndProperty(Label myLabel, String key, Object value) {
    Statement statement = spi.currentStatement();
    ReadOperations readOps = statement.readOperations();
    int propertyId = readOps.propertyKeyGetForName(key);
    int labelId = readOps.labelGetForName(myLabel.name());
    if (propertyId == NO_SUCH_PROPERTY_KEY || labelId == NO_SUCH_LABEL) {
        statement.close();
        return emptyIterator();
    }
    NewIndexDescriptor descriptor = findAnyIndexByLabelAndProperty(readOps, propertyId, labelId);
    try {
        if (null != descriptor) {
            // Ha! We found an index - let's use it to find matching nodes
            IndexQuery.ExactPredicate query = IndexQuery.exact(descriptor.schema().getPropertyId(), value);
            return map2nodes(readOps.indexQuery(descriptor, query), statement);
        }
    } catch (KernelException e) {
    // weird at this point but ignore and fallback to a label scan
    }
    return getNodesByLabelAndPropertyWithoutIndex(propertyId, value, statement, labelId);
}