| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License 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.apache.drill.exec.planner.logical; |
| |
| import org.apache.drill.common.parser.LogicalExpressionParser; |
| import com.google.common.base.Preconditions; |
| import org.apache.calcite.rel.RelFieldCollation; |
| import org.apache.drill.common.expression.FieldReference; |
| import org.apache.drill.common.expression.PathSegment; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.common.logical.data.JoinCondition; |
| import org.apache.drill.common.logical.data.NamedExpression; |
| import org.apache.drill.common.logical.data.Order; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class DrillLogicalTestUtils { |
| public static Order.Ordering ordering(String expression, |
| RelFieldCollation.Direction direction, |
| RelFieldCollation.NullDirection nullDirection) { |
| return new Order.Ordering(direction, LogicalExpressionParser.parse(expression), nullDirection); |
| } |
| |
| public static JoinCondition joinCond(String leftExpr, String relationship, String rightExpr) { |
| return new JoinCondition(relationship, LogicalExpressionParser.parse(leftExpr), LogicalExpressionParser.parse(rightExpr)); |
| } |
| |
| public static List<NamedExpression> parseExprs(String... expressionsAndOutputNames) { |
| Preconditions.checkArgument(expressionsAndOutputNames.length % 2 == 0, |
| "List of expressions and output field names" |
| + " is not complete, each expression must explicitly give and output name,"); |
| List<NamedExpression> ret = new ArrayList<>(); |
| for (int i = 0; i < expressionsAndOutputNames.length; i += 2) { |
| ret.add(new NamedExpression(LogicalExpressionParser.parse(expressionsAndOutputNames[i]), |
| new FieldReference(new SchemaPath(new PathSegment.NameSegment(expressionsAndOutputNames[i + 1]))))); |
| } |
| return ret; |
| } |
| |
| } |