Sample load script for "fires" synthetic test data.

fires_load.sql

# Dependencies:
# On CentOS you can install psycopg2 thus:
#
#  sudo yum install postgresql-libs
#  sudo yum install python-psycopg2

import psycopg2;
import datetime;
from multiprocessing.dummy import Pool as ThreadPool

num_fires_per_thread=50000
num_threads=4
connect_string="host=127.0.0.1 dbname=yugabyte user=yugabyte port=5433"

def create_table():
  conn = psycopg2.connect(connect_string)
  conn.set_session(autocommit=True)
  cur = conn.cursor()
  cur.execute("""DROP TABLE IF EXISTS fires""");
  cur.execute("""CREATE TABLE IF NOT EXISTS fires(
                      objectid         integer,
                      fire_name        text,
                      fire_year        integer,
                      discovery_date   double precision,
                      discovery_time   text,
                      stat_cause_descr text,
                      fire_size        double precision,
                      fire_size_class  text,
                      latitude         double precision,
                      longitude        double precision,
                      state            text,
                      county           text,
                      discovery_date_j text,
                      discovery_date_d date,
                      PRIMARY KEY(objectid))
              """)
  print("Created fires table")
  print("====================")
  # cur.execute("""CREATE INDEX IF NOT EXISTS state_idx ON fires(state)""")
  # print("Created name_idx on table")

def load_data_worker(thread_num):
  thread_id = str(thread_num)
  conn = psycopg2.connect(connect_string)
  conn.set_session(autocommit=True)
  cur = conn.cursor()

  print("Thread-" + thread_id + ": Inserting %d rows..." % (num_fires_per_thread))
  num_inserts = 0
  try:
   for idx in range(num_fires_per_thread):
     cur.execute("""INSERT INTO fires (objectid, fire_name, fire_year, discovery_date, discovery_time,"""
                 """                   stat_cause_descr, fire_size, fire_size_class, latitude, longitude,"""
                 """                   state, county, discovery_date_j, discovery_date_d) """
                 """ VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)""",
                 ((idx + (num_fires_per_thread * thread_num)),     # fire object id
                  "fire-"+thread_id+"-"+str(idx),                  # fire name
                  2000+thread_num,      # fire year
                  2000+thread_num,      # discovery date
                  str(2000+thread_num), # discovery time
                  "cause-"+thread_id+"-"+str(idx), # stat_cause_descr
                  (thread_num*idx+1234),     # fire_size
                  "fire-size-class--"+str(idx % 100), # fire_size_class
                  idx,                  # latitude
                  idx,                  # longitude
                  "state-"+str(idx%50), # state
                  "county-"+str(idx%1000), # county
                  str(2000+thread_num), # discovery_date_j
                  datetime.date.today() - datetime.timedelta(365 * thread_num)
                  ))
     num_inserts += 1
     if (idx % 10000 == 0):
       print("Thread-" + thread_id + ": Inserted %d rows" %  (num_inserts))

  except Exception as e:
    print("Unexpected exception: " + str(e))

  print("Thread-" + thread_id + ": Inserted %d rows" %  (num_inserts))

def load_data():
  pool = ThreadPool(num_threads)
  results = pool.map(load_data_worker, range(num_threads))

# Main
create_table()
load_data()