Database tables creation

import psycopg2

def connect_db():
    try:
        con = psycopg2.connect(database="db", user="postgres", password="postgres", host="10.227.211.142", port="5432")
        return con
    except Exception as error:
        print("An error occurred trying to connect to the database: " + error)

def create_tables(con):
    if(con is None):
        return
    cursor = con.cursor()
    
    # Change table's name.
    cursor.execute('CREATE TABLE IF NOT EXISTS "WELD_SAMPLES_[groupid]" (\
           "id" serial, \
           "time_start" float, \
           "time_end" float, \
           "environment_t" float, \
           "motor_bearing_t" float, \
           "spindle_bearing_t" float, \
           "counter" int, \
           "sdintensity" float, \
           "times" float ARRAY, \
           "angular_velocity" float ARRAY, \
           "force" float ARRAY, \
           "displacement" float ARRAY\
        )')
        
    # Missing algorithm results table creation...
    
    con.commit()
    cursor.close()
    con.close()

def run():
    con = connect_db()
    create_tables(con)


if __name__ == '__main__':
    run()