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/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [https://neo4j.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 .
*/
package org.neo4j.fabric.pipeline
import org.neo4j.configuration.GraphDatabaseInternalSettings
import org.neo4j.cypher.internal.CachingPreParser
import org.neo4j.cypher.internal.PreParsedQuery
import org.neo4j.cypher.internal.QueryOptions
import org.neo4j.cypher.internal.ast.Statement
import org.neo4j.cypher.internal.ast.semantics.SemanticFeature
import org.neo4j.cypher.internal.ast.semantics.SemanticFeature.MultipleGraphs
import org.neo4j.cypher.internal.ast.semantics.SemanticFeature.UseAsMultipleGraphsSelector
import org.neo4j.cypher.internal.cache.CacheSize
import org.neo4j.cypher.internal.cache.CacheTracer
import org.neo4j.cypher.internal.cache.CaffeineCacheFactory
import org.neo4j.cypher.internal.cache.CypherQueryCaches
import org.neo4j.cypher.internal.cache.CypherQueryCaches.PreParserCache
import org.neo4j.cypher.internal.compiler.helpers.ParameterValueTypeHelper
import org.neo4j.cypher.internal.compiler.phases.BaseContextImpl
import org.neo4j.cypher.internal.compiler.phases.CompilationPhases
import org.neo4j.cypher.internal.config.CypherConfiguration
import org.neo4j.cypher.internal.frontend.phases.BaseContext
import org.neo4j.cypher.internal.frontend.phases.BaseState
import org.neo4j.cypher.internal.frontend.phases.CompilationPhaseTracer
import org.neo4j.cypher.internal.frontend.phases.InitialState
import org.neo4j.cypher.internal.frontend.phases.InternalSyntaxUsageStats
import org.neo4j.cypher.internal.frontend.phases.ScopedProcedureSignatureResolver
import org.neo4j.cypher.internal.options.CypherExecutionMode
import org.neo4j.cypher.internal.planner.spi.PlannerNameFor
import org.neo4j.cypher.internal.planning.WrappedMonitors
import org.neo4j.cypher.internal.tracing.CompilationTracer
import org.neo4j.cypher.internal.tracing.TimingCompilationTracer
import org.neo4j.cypher.internal.util.AnonymousVariableNameGenerator
import org.neo4j.cypher.internal.util.CancellationChecker
import org.neo4j.cypher.internal.util.InternalNotification
import org.neo4j.cypher.internal.util.InternalNotificationLogger
import org.neo4j.cypher.rendering.QueryRenderer
import org.neo4j.fabric.planning.FabricPlan
import org.neo4j.fabric.util.Errors
import org.neo4j.monitoring
import org.neo4j.values.virtual.MapValue
case class FabricFrontEnd(
cypherConfig: CypherConfiguration,
kernelMonitors: monitoring.Monitors,
cacheFactory: CaffeineCacheFactory
) {
val compilationTracer = new TimingCompilationTracer(
kernelMonitors.newMonitor(classOf[TimingCompilationTracer.EventListener])
)
object preParsing {
private val preParser = new CachingPreParser(
cypherConfig,
new PreParserCache.Cache(
cacheFactory,
CacheSize.Dynamic(cypherConfig.queryCacheSize),
new CacheTracer[CypherQueryCaches.PreParserCache.Key] {}
)
)
def executionType(options: QueryOptions, inCompositeContext: Boolean): FabricPlan.ExecutionType =
options.queryOptions.executionMode match {
case CypherExecutionMode.default => FabricPlan.Execute
case CypherExecutionMode.explain => FabricPlan.Explain
case CypherExecutionMode.profile if inCompositeContext =>
Errors.semantic("'PROFILE' is not supported on composite databases.")
case CypherExecutionMode.profile => FabricPlan.PROFILE
}
def preParse(queryString: String, notificationLogger: InternalNotificationLogger): PreParsedQuery = {
preParser.preParseQuery(queryString, notificationLogger)
}
}
case class Pipeline(
signatures: ScopedProcedureSignatureResolver,
query: PreParsedQuery,
params: MapValue,
cancellationChecker: CancellationChecker,
notificationLogger: InternalNotificationLogger,
internalSyntaxUsageStats: InternalSyntaxUsageStats
) {
def traceStart(): CompilationTracer.QueryCompilationEvent =
compilationTracer.compileQuery(query.description)
private val context: BaseContext = BaseContextImpl(
CompilationPhaseTracer.NO_TRACING,
notificationLogger,
query.rawStatement,
Some(query.options.offset),
WrappedMonitors(kernelMonitors),
cancellationChecker,
internalSyntaxUsageStats,
null
)
private val semanticFeatures = Seq(
MultipleGraphs,
UseAsMultipleGraphsSelector
)
private val parsingConfig = CompilationPhases.ParsingConfig(
cypherVersion = query.options.queryOptions.cypherVersion.actualVersion,
extractLiterals = cypherConfig.extractLiterals,
parameterTypeMapping = ParameterValueTypeHelper.asCypherTypeMap(params, cypherConfig.useParameterSizeHint),
semanticFeatures =
CompilationPhases.enabledSemanticFeatures(
cypherConfig.enableExtraSemanticFeatures ++ cypherConfig.toggledFeatures(Map(
GraphDatabaseInternalSettings.show_setting -> SemanticFeature.ShowSetting.productPrefix,
GraphDatabaseInternalSettings.linked_users -> SemanticFeature.LinkedUsers.productPrefix,
GraphDatabaseInternalSettings.composable_commands -> SemanticFeature.ComposableCommands.productPrefix
))
) ++ semanticFeatures,
obfuscateLiterals = cypherConfig.obfuscateLiterals,
antlrParserEnabled = cypherConfig.cypherParserAntlrEnabled
)
object parseAndPrepare {
// We need to make sure that names generated in `parseAndPrepare` cannot ever clash with names
// generated elsewhere. The reason is that a query fragment that gets sent to a remote only undergoes
// parseAndPrepare. On the remote, a new anonymousVariableNameGenerator will be used and that must never
// clash with this one.
private val anonymousVariableNameGenerator = new AnonymousVariableNameGenerator(negativeNumbers = true)
private val transformer =
CompilationPhases
.fabricParsing(parsingConfig, signatures)
def process(): BaseState =
transformer.transform(
InitialState(query.statement, null, anonymousVariableNameGenerator),
context
)
}
object checkAndFinalize {
private val anonymousVariableNameGenerator = new AnonymousVariableNameGenerator(negativeNumbers = false)
private val transformer =
CompilationPhases.fabricFinalize(parsingConfig)
def process(statement: Statement, useFullQueryText: Boolean): BaseState = {
val localQueryString =
if (useFullQueryText)
query.rawStatement
else
QueryRenderer.render(statement)
val plannerName = PlannerNameFor(query.options.queryOptions.planner.name)
val state = InitialState(
localQueryString,
plannerName,
anonymousVariableNameGenerator = anonymousVariableNameGenerator
)
.withStatement(statement)
transformer.transform(state, context)
}
}
def internalNotifications: Set[InternalNotification] =
context.notificationLogger.notifications
}
}
