1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18package org.apache.spark.sql.catalyst.parser 19 20import org.apache.spark.sql.catalyst.TableIdentifier 21import org.apache.spark.sql.catalyst.expressions.Expression 22import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan 23 24/** 25 * Interface for a parser. 26 */ 27trait ParserInterface { 28 /** Creates LogicalPlan for a given SQL string. */ 29 def parsePlan(sqlText: String): LogicalPlan 30 31 /** Creates Expression for a given SQL string. */ 32 def parseExpression(sqlText: String): Expression 33 34 /** Creates TableIdentifier for a given SQL string. */ 35 def parseTableIdentifier(sqlText: String): TableIdentifier 36} 37