1 files changed, 55 insertions, 0 deletions
diff --git a/sql/backfill/backfill_file_meta.py b/sql/backfill/backfill_file_meta.py
new file mode 100755
index 0000000..e3b40a0
--- /dev/null
+++ b/sql/backfill/backfill_file_meta.py
@@ -0,0 +1,55 @@
+#!/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()