/*
 * 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.spark.sql.hudi

class TestDeleteFromTable extends HoodieSparkSqlTestBase {

  test("Test deleting from table") {
    withRecordType()(withTempDir { tmp =>
      Seq("cow", "mor").foreach { tableType =>
        val tableName = generateTableName
        spark.sql(
          s"""
             |CREATE TABLE $tableName (
             |  id int,
             |  dt string,
             |  name string,
             |  price double,
             |  ts long
             |) USING hudi
             | tblproperties (
             |    primaryKey = 'id',
             |    tableType = '$tableType'
             | )
             | PARTITIONED BY (dt)
             | LOCATION '${tmp.getCanonicalPath}/$tableName'
         """.stripMargin)

        // NOTE: Do not write the field alias, the partition field must be placed last.
        spark.sql(
          s"""
             | INSERT INTO $tableName VALUES
             | (1, 'a1', 10, 1000, "2021-01-05"),
             | (2, 'a2', 20, 2000, "2021-01-06"),
             | (3, 'a3', 30, 3000, "2021-01-07")
                """.stripMargin)

        checkAnswer(s"SELECT id, name, price, ts, dt FROM $tableName")(
          Seq(1, "a1", 10.0, 1000, "2021-01-05"),
          Seq(2, "a2", 20.0, 2000, "2021-01-06"),
          Seq(3, "a3", 30.0, 3000, "2021-01-07")
        )

        // Delete single row
        spark.sql(s"DELETE FROM $tableName WHERE id = 1")

        checkAnswer(s"SELECT id, name, price, ts, dt FROM $tableName")(
          Seq(2, "a2", 20.0, 2000, "2021-01-06"),
          Seq(3, "a3", 30.0, 3000, "2021-01-07")
        )

        // Try deleting non-existent row
        spark.sql(s"DELETE FROM $tableName WHERE id = 1")

        checkAnswer(s"SELECT id, name, price, ts, dt FROM $tableName")(
          Seq(2, "a2", 20.0, 2000, "2021-01-06"),
          Seq(3, "a3", 30.0, 3000, "2021-01-07")
        )

        // Delete record identified by some field other than the primary-key
        spark.sql(s"DELETE FROM $tableName WHERE name = 'a2'")

        checkAnswer(s"SELECT id, name, price, ts, dt FROM $tableName")(
          Seq(3, "a3", 30.0, 3000, "2021-01-07")
        )
      }
    })
  }
}
