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Command.scala
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Command.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.frontend.v3_2.ast
import org.neo4j.cypher.internal.frontend.v3_2._
import org.neo4j.cypher.internal.frontend.v3_2.symbols.{CypherType, _}
sealed trait Command extends Statement {
override def returnColumns = List.empty
}
case class CreateIndex(label: LabelName, properties: List[PropertyKeyName])(val position: InputPosition) extends Command {
// def property = properties(0)
def semanticCheck = Seq()
}
case class DropIndex(label: LabelName, properties: List[PropertyKeyName])(val position: InputPosition) extends Command {
def property = properties(0)
def semanticCheck = Seq()
}
trait PropertyConstraintCommand extends Command with SemanticChecking {
def variable: Variable
def property: Property
def entityType: CypherType
def semanticCheck =
variable.declare(entityType) chain
property.semanticCheck(Expression.SemanticContext.Simple) chain
when(!property.map.isInstanceOf[ast.Variable]) {
SemanticError("Cannot index nested properties", property.position)
}
}
trait CompositePropertyConstraintCommand extends Command with SemanticChecking {
def variable: Variable
def properties: Seq[Property]
def entityType: CypherType
def semanticCheck =
variable.declare(entityType) chain
properties.foldSemanticCheck(_.semanticCheck(Expression.SemanticContext.Simple)) chain
properties.foldSemanticCheck { property =>
when(!property.map.isInstanceOf[ast.Variable]) {
SemanticError("Cannot index nested properties", property.position)
}
}
}
trait NodePropertyConstraintCommand extends PropertyConstraintCommand {
val entityType = symbols.CTNode
def label: LabelName
}
trait UniquePropertyConstraintCommand extends CompositePropertyConstraintCommand {
val entityType = symbols.CTNode
def label: LabelName
}
trait RelationshipPropertyConstraintCommand extends PropertyConstraintCommand {
val entityType = symbols.CTRelationship
def relType: RelTypeName
}
case class CreateNodeKeyConstraint(variable: Variable, label: LabelName, properties: Seq[Property])(val position: InputPosition) extends UniquePropertyConstraintCommand
case class DropNodeKeyConstraint(variable: Variable, label: LabelName, properties: Seq[Property])(val position: InputPosition) extends UniquePropertyConstraintCommand
case class CreateUniquePropertyConstraint(variable: Variable, label: LabelName, properties: Seq[Property])(val position: InputPosition) extends UniquePropertyConstraintCommand
case class DropUniquePropertyConstraint(variable: Variable, label: LabelName, properties: Seq[Property])(val position: InputPosition) extends UniquePropertyConstraintCommand
case class CreateNodePropertyExistenceConstraint(variable: Variable, label: LabelName, property: Property)(val position: InputPosition) extends NodePropertyConstraintCommand
case class DropNodePropertyExistenceConstraint(variable: Variable, label: LabelName, property: Property)(val position: InputPosition) extends NodePropertyConstraintCommand
case class CreateRelationshipPropertyExistenceConstraint(variable: Variable, relType: RelTypeName, property: Property)(val position: InputPosition) extends RelationshipPropertyConstraintCommand
case class DropRelationshipPropertyExistenceConstraint(variable: Variable, relType: RelTypeName, property: Property)(val position: InputPosition) extends RelationshipPropertyConstraintCommand