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9f39ddf | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | """Database connection helper for the ML pipeline."""
import psycopg2
import psycopg2.extras
from config import DB
def get_conn():
"""Return a new psycopg2 connection."""
return psycopg2.connect(
host=DB["host"],
port=DB["port"],
dbname=DB["dbname"],
user=DB["user"],
password=DB["password"],
)
def fetch_all(sql, params=None):
with get_conn() as conn:
with conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor) as cur:
cur.execute(sql, params or ())
return cur.fetchall()
def fetch_one(sql, params=None):
with get_conn() as conn:
with conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor) as cur:
cur.execute(sql, params or ())
return cur.fetchone()
def execute(sql, params=None):
with get_conn() as conn:
with conn.cursor() as cur:
cur.execute(sql, params or ())
conn.commit()
def execute_batch(sql, params_list, page_size=500):
with get_conn() as conn:
with conn.cursor() as cur:
psycopg2.extras.execute_batch(cur, sql, params_list, page_size=page_size)
conn.commit()
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