null.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "val ss = spark; import ss.implicits._"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "val s = Seq((null, null))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "List((null,null))"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s.filter { case (a, b) => a == b }"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "val ds = spark.createDataset[(String, String)](s)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "root\n",
      " |-- _1: string (nullable = true)\n",
      " |-- _2: string (nullable = true)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "ds.printSchema"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "+---+---+\n",
      "| _1| _2|\n",
      "+---+---+\n",
      "+---+---+\n",
      "\n"
     ]
    }
   ],
   "source": [
    "ds.filter($\"_1\" === $\"_2\").show"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Apache Toree - Scala",
   "language": "scala",
   "name": "apache_toree_scala"
  },
  "language_info": {
   "file_extension": ".scala",
   "name": "scala",
   "version": "2.11.8"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}