| /* |
| * 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.druid.sql.calcite.expression.builtin; |
| |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.calcite.sql.SqlFunction; |
| import org.apache.calcite.sql.SqlFunctionCategory; |
| import org.apache.calcite.sql.type.ReturnTypes; |
| import org.apache.calcite.sql.type.SqlTypeFamily; |
| import org.apache.druid.segment.column.RowSignature; |
| import org.apache.druid.sql.calcite.expression.DruidExpression; |
| import org.apache.druid.sql.calcite.expression.OperatorConversions; |
| import org.apache.druid.sql.calcite.expression.SqlOperatorConversion; |
| import org.apache.druid.sql.calcite.planner.PlannerContext; |
| |
| public class RoundOperatorConversion implements SqlOperatorConversion |
| { |
| private static final SqlFunction SQL_FUNCTION = OperatorConversions |
| .operatorBuilder("ROUND") |
| .operandTypes(SqlTypeFamily.NUMERIC, SqlTypeFamily.INTEGER) |
| .requiredOperands(1) |
| .returnTypeInference(ReturnTypes.ARG0) |
| .functionCategory(SqlFunctionCategory.NUMERIC) |
| .build(); |
| |
| @Override |
| public SqlFunction calciteOperator() |
| { |
| return SQL_FUNCTION; |
| } |
| |
| @Override |
| public DruidExpression toDruidExpression(final PlannerContext plannerContext, final RowSignature rowSignature, final RexNode rexNode) |
| { |
| return OperatorConversions.convertCall(plannerContext, rowSignature, rexNode, inputExpressions -> { |
| return DruidExpression.fromFunctionCall( |
| "round", |
| inputExpressions |
| ); |
| }); |
| } |
| } |