experiments/sql/src/main/java/org/apache/gearpump/sql/utils/CalciteFrameworkConfiguration.java

/*
 * 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.gearpump.sql.utils;

import org.apache.calcite.config.Lex;
import org.apache.calcite.plan.Contexts;
import org.apache.calcite.plan.ConventionTraitDef;
import org.apache.calcite.plan.RelTraitDef;
import org.apache.calcite.rel.RelCollationTraitDef;
import org.apache.calcite.rel.type.RelDataTypeSystem;
import org.apache.calcite.schema.SchemaPlus;
import org.apache.calcite.sql.parser.SqlParser;
import org.apache.calcite.tools.FrameworkConfig;
import org.apache.calcite.tools.Frameworks;
import org.apache.calcite.tools.RuleSets;

import java.util.ArrayList;
import java.util.List;

public class CalciteFrameworkConfiguration {

  public static FrameworkConfig getDefaultconfig(SchemaPlus schema) {
    final List<RelTraitDef> traitDefs = new ArrayList<RelTraitDef>();

    traitDefs.add(ConventionTraitDef.INSTANCE);
    traitDefs.add(RelCollationTraitDef.INSTANCE);

    FrameworkConfig frameworkConfiguration = Frameworks.newConfigBuilder()
      .parserConfig(SqlParser.configBuilder()
        .setLex(Lex.JAVA)
        .build())
      .defaultSchema(schema)
      .traitDefs(traitDefs)
      .context(Contexts.EMPTY_CONTEXT)
      .ruleSets(RuleSets.ofList())
      .costFactory(null)
      .typeSystem(RelDataTypeSystem.DEFAULT)
      .build();

    return frameworkConfiguration;
  }
}