tutorials/011 - CSV Datasets.ipynb

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   "source": [
    "[![AWS SDK for pandas](_static/logo.png \"AWS SDK for pandas\")](https://github.com/aws/aws-sdk-pandas)\n",
    "\n",
    "# 11 - CSV Datasets\n",
    "\n",
    "awswrangler has 3 different write modes to store CSV Datasets on Amazon S3.\n",
    "\n",
    "- **append** (Default)\n",
    "\n",
    "    Only adds new files without any delete.\n",
    "    \n",
    "- **overwrite**\n",
    "\n",
    "    Deletes everything in the target directory and then add new files.\n",
    "    \n",
    "- **overwrite_partitions** (Partition Upsert)\n",
    "\n",
    "    Only deletes the paths of partitions that should be updated and then writes the new partitions files. It's like a \"partition Upsert\"."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from datetime import date\n",
    "\n",
    "import pandas as pd\n",
    "\n",
    "import awswrangler as wr"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Enter your bucket name:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdin",
     "output_type": "stream",
     "text": [
      " ············\n"
     ]
    }
   ],
   "source": [
    "import getpass\n",
    "\n",
    "bucket = getpass.getpass()\n",
    "path = f\"s3://{bucket}/dataset/\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Checking/Creating Glue Catalog Databases"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "if \"awswrangler_test\" not in wr.catalog.databases().values:\n",
    "    wr.catalog.create_database(\"awswrangler_test\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Creating the Dataset"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>1</td>\n",
       "      <td>foo</td>\n",
       "      <td>2020-01-01</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>2</td>\n",
       "      <td>boo</td>\n",
       "      <td>2020-01-02</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
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      "text/plain": [
       "   id value        date\n",
       "0   1   foo  2020-01-01\n",
       "1   2   boo  2020-01-02"
      ]
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     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "df = pd.DataFrame({\"id\": [1, 2], \"value\": [\"foo\", \"boo\"], \"date\": [date(2020, 1, 1), date(2020, 1, 2)]})\n",
    "\n",
    "wr.s3.to_csv(\n",
    "    df=df, path=path, index=False, dataset=True, mode=\"overwrite\", database=\"awswrangler_test\", table=\"csv_dataset\"\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_table(database=\"awswrangler_test\", table=\"csv_dataset\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Appending"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>3</td>\n",
       "      <td>bar</td>\n",
       "      <td>2020-01-03</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>1</td>\n",
       "      <td>foo</td>\n",
       "      <td>2020-01-01</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>2</td>\n",
       "      <td>boo</td>\n",
       "      <td>2020-01-02</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
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      "text/plain": [
       "   id value        date\n",
       "0   3   bar  2020-01-03\n",
       "1   1   foo  2020-01-01\n",
       "2   2   boo  2020-01-02"
      ]
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   "source": [
    "df = pd.DataFrame({\"id\": [3], \"value\": [\"bar\"], \"date\": [date(2020, 1, 3)]})\n",
    "\n",
    "wr.s3.to_csv(\n",
    "    df=df, path=path, index=False, dataset=True, mode=\"append\", database=\"awswrangler_test\", table=\"csv_dataset\"\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_table(database=\"awswrangler_test\", table=\"csv_dataset\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Overwriting"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>3</td>\n",
       "      <td>bar</td>\n",
       "      <td>2020-01-03</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
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      "text/plain": [
       "   id value        date\n",
       "0   3   bar  2020-01-03"
      ]
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     "execution_count": 6,
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   ],
   "source": [
    "wr.s3.to_csv(\n",
    "    df=df, path=path, index=False, dataset=True, mode=\"overwrite\", database=\"awswrangler_test\", table=\"csv_dataset\"\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_table(database=\"awswrangler_test\", table=\"csv_dataset\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Creating a **Partitioned** Dataset"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
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       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>2</td>\n",
       "      <td>boo</td>\n",
       "      <td>2020-01-02</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>1</td>\n",
       "      <td>foo</td>\n",
       "      <td>2020-01-01</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
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      "text/plain": [
       "   id value        date\n",
       "0   2   boo  2020-01-02\n",
       "1   1   foo  2020-01-01"
      ]
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     "execution_count": 7,
     "metadata": {},
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   "source": [
    "df = pd.DataFrame({\"id\": [1, 2], \"value\": [\"foo\", \"boo\"], \"date\": [date(2020, 1, 1), date(2020, 1, 2)]})\n",
    "\n",
    "wr.s3.to_csv(\n",
    "    df=df,\n",
    "    path=path,\n",
    "    index=False,\n",
    "    dataset=True,\n",
    "    mode=\"overwrite\",\n",
    "    database=\"awswrangler_test\",\n",
    "    table=\"csv_dataset\",\n",
    "    partition_cols=[\"date\"],\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_table(database=\"awswrangler_test\", table=\"csv_dataset\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Upserting partitions (overwrite_partitions)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
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       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>1</td>\n",
       "      <td>foo</td>\n",
       "      <td>2020-01-01</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>2</td>\n",
       "      <td>xoo</td>\n",
       "      <td>2020-01-02</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>3</td>\n",
       "      <td>bar</td>\n",
       "      <td>2020-01-03</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "   id value        date\n",
       "0   1   foo  2020-01-01\n",
       "1   2   xoo  2020-01-02\n",
       "0   3   bar  2020-01-03"
      ]
     },
     "execution_count": 8,
     "metadata": {},
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   ],
   "source": [
    "df = pd.DataFrame({\"id\": [2, 3], \"value\": [\"xoo\", \"bar\"], \"date\": [date(2020, 1, 2), date(2020, 1, 3)]})\n",
    "\n",
    "wr.s3.to_csv(\n",
    "    df=df,\n",
    "    path=path,\n",
    "    index=False,\n",
    "    dataset=True,\n",
    "    mode=\"overwrite_partitions\",\n",
    "    database=\"awswrangler_test\",\n",
    "    table=\"csv_dataset\",\n",
    "    partition_cols=[\"date\"],\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_table(database=\"awswrangler_test\", table=\"csv_dataset\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## BONUS - Glue/Athena integration"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>id</th>\n",
       "      <th>value</th>\n",
       "      <th>date</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>1</td>\n",
       "      <td>foo</td>\n",
       "      <td>2020-01-01</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>2</td>\n",
       "      <td>boo</td>\n",
       "      <td>2020-01-02</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "   id value        date\n",
       "0   1   foo  2020-01-01\n",
       "1   2   boo  2020-01-02"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "df = pd.DataFrame({\"id\": [1, 2], \"value\": [\"foo\", \"boo\"], \"date\": [date(2020, 1, 1), date(2020, 1, 2)]})\n",
    "\n",
    "wr.s3.to_csv(\n",
    "    df=df,\n",
    "    path=path,\n",
    "    dataset=True,\n",
    "    index=False,\n",
    "    mode=\"overwrite\",\n",
    "    database=\"aws_sdk_pandas\",\n",
    "    table=\"my_table\",\n",
    "    compression=\"gzip\",\n",
    ")\n",
    "\n",
    "wr.athena.read_sql_query(\"SELECT * FROM my_table\", database=\"aws_sdk_pandas\")"
   ]
  }
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