exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillTableModifyRule.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,
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 * See the License for the specific language governing permissions and
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package org.apache.drill.exec.planner.logical;

import org.apache.calcite.plan.Convention;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.plan.RelTrait;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.TableModify;
import org.apache.calcite.rel.logical.LogicalTableModify;

public class DrillTableModifyRule extends RelOptRule {
  public static final RelOptRule INSTANCE = new DrillTableModifyRule();

  private final RelTrait out;

  private DrillTableModifyRule() {
    super(RelOptHelper.any(LogicalTableModify.class, Convention.NONE),
      DrillRelFactories.LOGICAL_BUILDER, "DrillTableModifyRule");
    this.out = DrillRel.DRILL_LOGICAL;
  }

  @Override
  public void onMatch(RelOptRuleCall call) {
    TableModify tableModify = call.rel(0);
    RelNode input = tableModify.getInput();
    RelTraitSet traits = tableModify.getTraitSet().plus(out);
    RelNode convertedInput = convert(input, input.getTraitSet().plus(out).simplify());

    call.transformTo(new DrillTableModify(
      tableModify.getCluster(), traits, tableModify.getTable(),
      tableModify.getCatalogReader(), convertedInput, tableModify.getOperation(),
      tableModify.getUpdateColumnList(), tableModify.getSourceExpressionList(), tableModify.isFlattened()));
  }
}