examples/spark/src/main/scala/org/apache/carbondata/examples/AllDictionaryExample.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
 *
 * 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.carbondata.examples

import org.apache.carbondata.core.constants.CarbonCommonConstants
import org.apache.carbondata.core.util.CarbonProperties
import org.apache.carbondata.examples.util.{AllDictionaryUtil, ExampleUtils}

object AllDictionaryExample {

  def main(args: Array[String]) {
    val cc = ExampleUtils.createCarbonContext("AllDictionaryExample")
    val testData = ExampleUtils.currentPath + "/src/main/resources/data.csv"
    val csvHeader = "ID,date,country,name,phonetype,serialname,salary"
    val dictCol = "|date|country|name|phonetype|serialname|"
    val allDictFile = ExampleUtils.currentPath + "/src/main/resources/data.dictionary"
    // extract all dictionary files from source data
    AllDictionaryUtil.extractDictionary(cc.sparkContext,
      testData, allDictFile, csvHeader, dictCol)
    // Specify date format based on raw data
    CarbonProperties.getInstance()
      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")

    cc.sql("DROP TABLE IF EXISTS t3")

    cc.sql("""
           CREATE TABLE IF NOT EXISTS t3
           (ID Int, date Date, country String,
           name String, phonetype String, serialname String, salary Int,floatField float)
           STORED BY 'carbondata'
           """)

    cc.sql(s"""
           LOAD DATA LOCAL INPATH '$testData' into table t3
           options('ALL_DICTIONARY_PATH'='$allDictFile')
           """)

    cc.sql("""
           SELECT * FROM t3
           """).show()

    cc.sql("""
           SELECT * FROM t3 where floatField=3.5
           """).show()

    cc.sql("DROP TABLE IF EXISTS t3")

    // clean local dictionary files
    AllDictionaryUtil.cleanDictionary(allDictFile)
  }

}