org.partiql.lang.ast.IsImplictJoinMeta.kt Maven / Gradle / Ivy

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An implementation of PartiQL for the JVM written in Kotlin.

There is a newer version: 1.0.0-perf.1

/*
 * Copyright 2019 Amazon.com, Inc. or its affiliates.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 *  You may not use this file except in compliance with the License.
 * A copy of the License is located at:
 *
 *      http://aws.amazon.com/apache2.0/
 *
 *  or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
 *  language governing permissions and limitations under the License.
 */
package org.partiql.lang.ast

/**
 * Meta node intended to be attached to an instance of [FromSourcedJoin] to indicate that no
 * join condition was specified in the original query and therefore this is an implicit join.
 */
class IsImplictJoinMeta private constructor() : Meta {
    override val tag = TAG

    companion object {
        const val TAG = "\$is_implicit_join"

        val instance = IsImplictJoinMeta()
    }
}