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CreatePlannerQuery.scala
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CreatePlannerQuery.scala
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/*
* Copyright (c) 2002-2017 "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.compiler.v3_3.phases
import org.neo4j.cypher.internal.compiler.v3_3.ast.convert.plannerQuery.StatementConverters._
import org.neo4j.cypher.internal.frontend.v3_4.InternalException
import org.neo4j.cypher.internal.frontend.v3_4.ast.Query
import org.neo4j.cypher.internal.frontend.v3_4.phases.CompilationPhaseTracer.CompilationPhase.LOGICAL_PLANNING
import org.neo4j.cypher.internal.frontend.v3_4.phases.{BaseContext, BaseState, Phase}
import org.neo4j.cypher.internal.ir.v3_3.UnionQuery
object CreatePlannerQuery extends Phase[BaseContext, BaseState, LogicalPlanState] {
override def phase = LOGICAL_PLANNING
override def description = "from the normalized ast, create the corresponding PlannerQuery"
override def postConditions = Set(CompilationContains[UnionQuery])
override def process(from: BaseState, context: BaseContext): LogicalPlanState = from.statement() match {
case query: Query =>
val unionQuery: UnionQuery = toUnionQuery(query, from.semanticTable())
LogicalPlanState(from).copy(maybeUnionQuery = Some(unionQuery))
case x => throw new InternalException(s"Expected a Query and not `$x`")
}
}