Simple SQLite inserts with SQLAlchemy and Odo

sqlalchemy_odo.ipynb

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   "cell_type": "code",
   "execution_count": 1,
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   "source": [
    "from sqlalchemy import Table, Column, create_engine, Integer, MetaData\n",
    "from datashape import int_, Record, Option, var\n",
    "from odo import resource, odo"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
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   "outputs": [],
   "source": [
    "data = [{'col1': x} for x in range(100, 103)]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### SQLAlchemy"
   ]
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   "execution_count": 3,
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   "outputs": [],
   "source": [
    "engine = create_engine('sqlite:///:memory:')\n",
    "metadata = MetaData(bind=engine)\n",
    "table = Table('testing', metadata, \n",
    "              Column('id', Integer, primary_key=True),\n",
    "              Column('col1', Integer))\n",
    "metadata.create_all()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
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   "outputs": [],
   "source": [
    "with engine.contextual_connect() as conn:\n",
    "    conn.execute(table.insert(), data)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(1, 100)\n",
      "(2, 101)\n",
      "(3, 102)\n"
     ]
    }
   ],
   "source": [
    "with engine.contextual_connect() as conn:\n",
    "    for row in conn.execute(table.select()):\n",
    "        print(row)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "Table('testing', MetaData(bind=Engine(sqlite:///:memory:)), Column('id', Integer(), table=<testing>, primary_key=True, nullable=False), Column('col1', Integer(), table=<testing>), schema=None)"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "table"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Odo"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Table('testing', MetaData(bind=Engine(sqlite:///)), Column('id', Integer(), table=<testing>, primary_key=True, nullable=False), Column('col1', Integer(), table=<testing>, nullable=False), schema=None)"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dshape = var * Record([('id', int_), ('col1', int_)])\n",
    "res = resource(\n",
    "    'sqlite:///::testing', dshape=dshape, primary_key=['id'])\n",
    "res"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Table('testing', MetaData(bind=Engine(sqlite:///)), Column('id', Integer(), table=<testing>, primary_key=True, nullable=False), Column('col1', Integer(), table=<testing>, nullable=False), schema=None)"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "odo(data, res)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[(1, 100), (2, 101), (3, 102)]"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "odo(res, list)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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