{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import xgt\n",
    "# Connect to server\n",
    "server = xgt.Connection()\n",
    "\n",
    "# Drop all objects\n",
    "[server.drop_frame(f) for f in ['ReportsTo', 'Employees']]\n",
    "\n",
    "# Define and create the graph schema in the \"demo\" namespace\n",
    "employees = server.create_vertex_frame(\n",
    "  name='Employees',\n",
    "  schema=[['person_id', xgt.INT],\n",
    "          ['name', xgt.TEXT],\n",
    "          ['postal_code', xgt.INT]],\n",
    "  key='person_id')\n",
    "\n",
    "reports_to = server.create_edge_frame(\n",
    "  name='ReportsTo',\n",
    "  schema=[['employee_id', xgt.INT],\n",
    "          ['boss_id', xgt.INT],\n",
    "          ['start_date', xgt.DATE],\n",
    "          ['end_date', xgt.DATE]],\n",
    "  source=employees,\n",
    "  target=employees,\n",
    "  source_key='employee_id',\n",
    "  target_key='boss_id')\n",
    "\n",
    "# Load data to the graph in the xGT server.\n",
    "# Use the insert() method for data of a few hundred rows or fewer;\n",
    "# for bigger amounts of data, use the load() method with CSV files.\n",
    "employees.insert(\n",
    "  [[111111101, 'Manny', 98103],\n",
    "   [111111102, 'Trish', 98108],\n",
    "   [911111501, 'Frank', 98101],\n",
    "   [911111502, 'Alice', 98102]\n",
    "  ])\n",
    "reports_to.insert(\n",
    "  [[111111101, 911111501, '2015-01-03', '2017-04-14'],\n",
    "   [111111102, 911111501, '2016-04-02', '2017-04-14'],\n",
    "   [911111502, 911111501, '2016-07-07', '2017-04-14'],\n",
    "   [111111101, 911111502, '2017-04-15', None],\n",
    "   [111111102, 911111502, '2017-04-15', None],\n",
    "   [911111501, 911111502, '2017-04-15', None]\n",
    "  ])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def run_query(server, query):\n",
    "    j=server.run_job(query)\n",
    "    return j.get_data(format = 'pandas')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Example Query\n",
    "run_query(server, \"\"\"\n",
    "  MATCH (employee:Employees)-[edge1:ReportsTo]->\n",
    "        (boss:Employees)-[edge2:ReportsTo]->(employee)\n",
    "  WHERE\n",
    "    edge1.end_date <= edge2.start_date\n",
    "  RETURN\n",
    "    employee.person_id AS employee1_id,\n",
    "    boss.person_id AS employee2_id,\n",
    "    edge1.start_date AS start1,\n",
    "    edge1.end_date AS end1,\n",
    "    edge2.start_date AS start2,\n",
    "    edge2.end_date AS end2\n",
    "\"\"\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Cleanup, drop all objects\n",
    "[server.drop_frame(f) for f in ['ReportsTo', 'Employees']]"
   ]
  }
 ],
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