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app.py
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app.py
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from flask import Flask, request, jsonify
from parse_tree import *
from flask_cors import CORS
import psycopg2
app = Flask(__name__)
CORS(app)
@app.route('/')
def hello_world():
return 'Hello, World!'
@app.route("/plot_query_tree", methods=["POST"])
def plot_query_tree():
data = request.get_json()
stats, all_nodes, _ = plotQueryTree(data['query'], data["qep"])
return jsonify(stats=stats, all_nodes=all_nodes)
@app.route("/plot_query_tree_from_sql", methods=["POST"])
def plot_query_tree_from_sql():
data = request.get_json()
try:
conn = psycopg2.connect(host=data['host'],
database=data['database'],
user=data['user'],
password=data['password'])
cur = conn.cursor()
cur.execute('EXPLAIN(FORMAT JSON) ' + data['query'])
result = cur.fetchall()
except (Exception, psycopg2.DatabaseError) as error:
print(error)
finally:
if cur:
cur.close()
qep = result[0][0]
stats, all_nodes, _ = plotQueryTree(data['query'], qep)
return jsonify(stats=stats, all_nodes=all_nodes)
if __name__ == "__main__":
app.run(host='0.0.0.0')