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TransactionBoundPlanContext.scala
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TransactionBoundPlanContext.scala
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.cypher.internal.runtime.interpreted
import java.util.Optional
import org.neo4j.cypher.MissingIndexException
import org.neo4j.cypher.internal.frontend.v3_4.phases.InternalNotificationLogger
import org.neo4j.cypher.internal.planner.v3_4.spi._
import org.neo4j.cypher.internal.util.v3_4.CypherExecutionException
import org.neo4j.cypher.internal.util.v3_4.symbols._
import org.neo4j.cypher.internal.v3_4.logical.plans._
import org.neo4j.internal.kernel.api.InternalIndexState
import org.neo4j.internal.kernel.api.exceptions.KernelException
import org.neo4j.kernel.api.proc.Neo4jTypes.AnyType
import org.neo4j.kernel.api.proc.{Neo4jTypes, QualifiedName => KernelQualifiedName}
import org.neo4j.kernel.api.schema.SchemaDescriptorFactory
import org.neo4j.kernel.api.schema.index.{IndexDescriptor => KernelIndexDescriptor}
import org.neo4j.kernel.impl.proc.DefaultParameterValue
import org.neo4j.procedure.Mode
import scala.collection.JavaConverters._
object TransactionBoundPlanContext {
def apply(tc: TransactionalContextWrapper, logger: InternalNotificationLogger) =
new TransactionBoundPlanContext(tc, logger, InstrumentedGraphStatistics(TransactionBoundGraphStatistics(tc.dataRead,
tc.readOperations),
new MutableGraphStatisticsSnapshot()))
}
class TransactionBoundPlanContext(tc: TransactionalContextWrapper, logger: InternalNotificationLogger, graphStatistics: GraphStatistics)
extends TransactionBoundTokenContext(tc.statement) with PlanContext with IndexDescriptorCompatibility {
def indexesGetForLabel(labelId: Int): Iterator[IndexDescriptor] = {
tc.statement.readOperations().indexesGetForLabel(labelId).asScala
.filter(_.`type`() == KernelIndexDescriptor.Type.GENERAL)
.flatMap(getOnlineIndex)
}
def indexGet(labelName: String, propertyKeys: Seq[String]): Option[IndexDescriptor] = evalOrNone {
val descriptor = toLabelSchemaDescriptor(this, labelName, propertyKeys)
getOnlineIndex(tc.statement.readOperations().indexGetForSchema(descriptor))
}
def indexExistsForLabel(labelName: String): Boolean = {
try {
val labelId = getLabelId(labelName)
val onlineIndexDescriptors = tc.statement.readOperations().indexesGetForLabel(labelId).asScala
.filter(_.`type`() == KernelIndexDescriptor.Type.GENERAL)
.flatMap(getOnlineIndex)
onlineIndexDescriptors.nonEmpty
} catch {
case _: KernelException => false
}
}
def uniqueIndexesGetForLabel(labelId: Int): Iterator[IndexDescriptor] = {
tc.statement.readOperations().indexesGetForLabel(labelId).asScala
.filter(_.`type`() == KernelIndexDescriptor.Type.UNIQUE)
.flatMap(getOnlineIndex)
}
def uniqueIndexGet(labelName: String, propertyKeys: Seq[String]): Option[IndexDescriptor] = evalOrNone {
val descriptor = toLabelSchemaDescriptor(this, labelName, propertyKeys)
getOnlineIndex(tc.statement.readOperations().indexGetForSchema(descriptor))
}
private def evalOrNone[T](f: => Option[T]): Option[T] =
try {
f
} catch {
case _: KernelException => None
}
private def getOnlineIndex(descriptor: KernelIndexDescriptor): Option[IndexDescriptor] =
tc.statement.readOperations().indexGetState(descriptor) match {
case InternalIndexState.ONLINE => Some(IndexDescriptor(descriptor.schema().getLabelId, descriptor.schema().getPropertyIds))
case _ => None
}
override def hasPropertyExistenceConstraint(labelName: String, propertyKey: String): Boolean = {
try {
val labelId = getLabelId(labelName)
val propertyKeyId = getPropertyKeyId(propertyKey)
tc.statement.readOperations().constraintsGetForSchema(SchemaDescriptorFactory.forLabel(labelId, propertyKeyId)).hasNext
} catch {
case _: KernelException => false
}
}
def checkNodeIndex(idxName: String) {
if (!tc.statement.readOperations().nodeExplicitIndexesGetAll().contains(idxName)) {
throw new MissingIndexException(idxName)
}
}
def checkRelIndex(idxName: String) {
if (!tc.statement.readOperations().relationshipExplicitIndexesGetAll().contains(idxName)) {
throw new MissingIndexException(idxName)
}
}
def getOrCreateFromSchemaState[T](key: Any, f: => T): T = {
val javaCreator = new java.util.function.Function[Any, T]() {
def apply(key: Any) = f
}
tc.statement.readOperations().schemaStateGetOrCreate(key, javaCreator)
}
val statistics: GraphStatistics = graphStatistics
val txIdProvider = LastCommittedTxIdProvider(tc.graph)
override def procedureSignature(name: QualifiedName) = {
val kn = new KernelQualifiedName(name.namespace.asJava, name.name)
val ks = tc.statement.readOperations().procedureGet(kn)
val input = ks.inputSignature().asScala
.map(s => FieldSignature(s.name(), asCypherType(s.neo4jType()), asOption(s.defaultValue()).map(asCypherValue)))
.toIndexedSeq
val output = if (ks.isVoid) None else Some(
ks.outputSignature().asScala.map(s => FieldSignature(s.name(), asCypherType(s.neo4jType()), deprecated = s.isDeprecated)).toIndexedSeq)
val deprecationInfo = asOption(ks.deprecated())
val mode = asCypherProcMode(ks.mode(), ks.allowed())
val description = asOption(ks.description())
val warning = asOption(ks.warning())
ProcedureSignature(name, input, output, deprecationInfo, mode, description, warning)
}
override def functionSignature(name: QualifiedName): Option[UserFunctionSignature] = {
val kn = new KernelQualifiedName(name.namespace.asJava, name.name)
val maybeFunction = tc.statement.readOperations().functionGet(kn)
val (fcn, aggregation) = if (maybeFunction.isPresent) (Some(maybeFunction.get), false)
else (asOption(tc.statement.readOperations().aggregationFunctionGet(kn)), true)
fcn.map(f => {
val input = f.inputSignature().asScala
.map(s => FieldSignature(s.name(), asCypherType(s.neo4jType()), asOption(s.defaultValue()).map(asCypherValue)))
.toIndexedSeq
val output = asCypherType(f.outputType())
val deprecationInfo = asOption(f.deprecated())
val description = asOption(f.description())
UserFunctionSignature(name, input, output, deprecationInfo, f.allowed(), description, isAggregate = aggregation)
})
}
private def asOption[T](optional: Optional[T]): Option[T] = if (optional.isPresent) Some(optional.get()) else None
private def asCypherProcMode(mode: Mode, allowed: Array[String]): ProcedureAccessMode = mode match {
case Mode.READ => ProcedureReadOnlyAccess(allowed)
case Mode.DEFAULT => ProcedureReadOnlyAccess(allowed)
case Mode.WRITE => ProcedureReadWriteAccess(allowed)
case Mode.SCHEMA => ProcedureSchemaWriteAccess(allowed)
case Mode.DBMS => ProcedureDbmsAccess(allowed)
case _ => throw new CypherExecutionException(
"Unable to execute procedure, because it requires an unrecognized execution mode: " + mode.name(), null)
}
private def asCypherValue(neo4jValue: DefaultParameterValue) = CypherValue(neo4jValue.value,
asCypherType(neo4jValue.neo4jType()))
private def asCypherType(neoType: AnyType): CypherType = neoType match {
case Neo4jTypes.NTString => CTString
case Neo4jTypes.NTInteger => CTInteger
case Neo4jTypes.NTFloat => CTFloat
case Neo4jTypes.NTNumber => CTNumber
case Neo4jTypes.NTBoolean => CTBoolean
case l: Neo4jTypes.ListType => CTList(asCypherType(l.innerType()))
case Neo4jTypes.NTDateTime => CTDateTime
case Neo4jTypes.NTLocalDateTime => CTLocalDateTime
case Neo4jTypes.NTDate => CTDate
case Neo4jTypes.NTTime => CTTime
case Neo4jTypes.NTLocalTime => CTLocalTime
case Neo4jTypes.NTDuration => CTDuration
case Neo4jTypes.NTPoint => CTPoint
case Neo4jTypes.NTNode => CTNode
case Neo4jTypes.NTRelationship => CTRelationship
case Neo4jTypes.NTPath => CTPath
case Neo4jTypes.NTGeometry => CTGeometry
case Neo4jTypes.NTMap => CTMap
case Neo4jTypes.NTAny => CTAny
}
override def notificationLogger(): InternalNotificationLogger = logger
}