| /* |
| * 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.external; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.calcite.sql.SqlOperator; |
| import org.apache.calcite.sql.validate.SqlUserDefinedTableMacro; |
| import org.apache.druid.catalog.model.TableDefnRegistry; |
| import org.apache.druid.catalog.model.table.InputSourceDefn; |
| import org.apache.druid.catalog.model.table.TableFunction; |
| import org.apache.druid.segment.column.RowSignature; |
| import org.apache.druid.sql.calcite.expression.DruidExpression; |
| import org.apache.druid.sql.calcite.expression.SqlOperatorConversion; |
| import org.apache.druid.sql.calcite.planner.PlannerContext; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Operator conversion for user-defined table macros (functions) based on the |
| * {@link TableFunction} abstraction defined by the catalog. |
| */ |
| public abstract class DruidUserDefinedTableMacroConversion implements SqlOperatorConversion |
| { |
| private final SqlUserDefinedTableMacro operator; |
| |
| public DruidUserDefinedTableMacroConversion( |
| final String name, |
| final TableDefnRegistry registry, |
| final String tableType, |
| final ObjectMapper jsonMapper |
| ) |
| { |
| this( |
| name, |
| ((InputSourceDefn) registry.inputSourceDefnFor(tableType)).adHocTableFn(), |
| jsonMapper |
| ); |
| } |
| |
| public DruidUserDefinedTableMacroConversion( |
| final String name, |
| final TableFunction fn, |
| final ObjectMapper jsonMapper |
| ) |
| { |
| this.operator = new DruidUserDefinedTableMacro( |
| new DruidTableMacro(name, fn, jsonMapper) |
| ); |
| } |
| |
| @Override |
| public SqlOperator calciteOperator() |
| { |
| return operator; |
| } |
| |
| @Nullable |
| @Override |
| public DruidExpression toDruidExpression(PlannerContext plannerContext, RowSignature rowSignature, RexNode rexNode) |
| { |
| return null; |
| } |
| } |