/*
    * 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.shardingsphere.sql.parser.sql.dialect.statement.mysql.dal;
  
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dal.FromSchemaSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dal.ShowFilterSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.table.SimpleTableSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.statement.AbstractSQLStatement;
  import org.apache.shardingsphere.sql.parser.sql.common.statement.dal.DALStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.mysql.MySQLStatement;
  
  import java.util.Optional;
  
  /**
   * MySQL show columns statement.
   */
  @Setter
  public final class MySQLShowColumnsStatement extends AbstractSQLStatement implements DALStatement, MySQLStatement {
      
      @Getter
      private SimpleTableSegment table;
      
      private FromSchemaSegment fromSchema;
      
      private ShowFilterSegment filter;
      
      /**
       * Get from schema.
       *
       * @return from schema
       */
      public Optional<FromSchemaSegment> getFromSchema() {
          return Optional.ofNullable(fromSchema);
      }
      
      /**
       * Get filter segment.
       *
       * @return filter segment
       */
      public Optional<ShowFilterSegment> getFilter() {
          return Optional.ofNullable(filter);
      }
  }