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#!/usr/bin/env python3
"""
This is a "one-time" tranform helper script for file_meta backfill into
sandcrawler postgresql.
Most of this file was copied from '../python/common.py'.
"""
import json, os, sys, collections
import psycopg2
import psycopg2.extras
def insert(cur, batch):
sql = """
INSERT INTO
file_meta
VALUES %s
ON CONFLICT DO NOTHING;
"""
res = psycopg2.extras.execute_values(cur, sql, batch)
def stdin_to_pg():
# no host means it will use local domain socket by default
conn = psycopg2.connect(database="sandcrawler", user="postgres")
cur = conn.cursor()
counts = collections.Counter({'total': 0})
batch = []
for l in sys.stdin:
if counts['raw_lines'] > 0 and counts['raw_lines'] % 10000 == 0:
print("Progress: {}...".format(counts))
counts['raw_lines'] += 1
if not l.strip():
continue
info = l.split("\t")
if not info:
continue
assert len(info) == 5
info[-1] = info[-1].strip() or None
batch.append(info)
counts['total'] += 1
if len(batch) >= 1000:
insert(cur, batch)
conn.commit()
batch = []
counts['batches'] += 1
if batch:
insert(cur, batch)
batch = []
conn.commit()
cur.close()
print("Done: {}".format(counts))
if __name__=='__main__':
stdin_to_pg()
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