integration/spark/src/test/scala/org/apache/carbondata/spark/testsuite/booleantype/compress/TestBooleanCompressSuite.scala

/*
 * 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
 *
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 * 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.carbondata.spark.testsuite.booleantype.compress

import java.io.{File, PrintWriter}

import scala.util.Random

import org.scalatest.{BeforeAndAfterAll, BeforeAndAfterEach}

import org.apache.spark.sql.Row
import org.apache.spark.sql.test.util.QueryTest

class TestBooleanCompressSuite extends QueryTest with BeforeAndAfterEach with BeforeAndAfterAll {

  override def beforeEach(): Unit = {
    sql("drop table if exists boolean_table")
  }

  override def afterAll(): Unit = {
    sql("drop table if exists boolean_table")
    assert(deleteFile(randomBoolean))
  }

  val randomBoolean = s"$resourcesPath/bool/supportRandomBooleanBigFile.csv"
  val trueNum = 10000000

  override def beforeAll(): Unit = {
    assert(createBooleanFileRandom(randomBoolean, trueNum, 0.5))
  }

  test("test boolean compress rate: random file") {
    sql(
      s"""
         | CREATE TABLE boolean_table(
         | booleanField BOOLEAN
         | )
         | STORED AS carbondata
       """.stripMargin)

    sql(
      s"""
         | LOAD DATA LOCAL INPATH '${randomBoolean}'
         | INTO TABLE boolean_table
         | options('FILEHEADER'='booleanField')
           """.stripMargin)

    //    Test for compress rate
    //    sql("select * from boolean_table").show(100)
    //    sql("select count(*) from boolean_table").show()
    //    sql("select count(*) from boolean_table where booleanField= true").show()
    //    sql("select count(*) from boolean_table where booleanField= false").show()
    checkAnswer(
      sql("select count(*) from boolean_table"),
      Row(trueNum))
  }

  val randomNumber = 10000
  def createBooleanFileRandom(path: String, totalLines: Int, rate: Double): Boolean = {
    try {
      val write = new PrintWriter(path)
      var d: Double = 0.0
      val random = new Random()
      for (i <- 0 until totalLines) {
        val eachNum = random.nextInt(randomNumber)
        var flag: Boolean = true
        if (eachNum >= randomNumber * rate) {
          flag = false
        }
        write.println(flag)
        d = d + 1
      }

      write.close()
    } catch {
      case _: Exception => assert(false)
    }
    return true
  }

  def deleteFile(path: String): Boolean = {
    try {
      val file = new File(path)
      file.delete()
    } catch {
      case _: Exception => assert(false)
    }
    return true
  }
}