Skip to content

Instantly share code, notes, and snippets.

@rob-b

rob-b/gist:69b462832bff5923010f

Forked from hest/gist:8798884
Last active August 29, 2015 14:23
Show Gist options
  • Save rob-b/69b462832bff5923010f to your computer and use it in GitHub Desktop.
Save rob-b/69b462832bff5923010f to your computer and use it in GitHub Desktop.
Download ZIP
Raw
gistfile1.py
def get_count(q):
count_q = q.statement.with_only_columns([func.count()]).order_by(None)
count = q.session.execute(count_q).scalar()
return count
q = session.query(TestModel).filter(...).order_by(...)
# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
print q.count()
# Fast: SELECT COUNT(*) FROM TestModel WHERE ...
print get_count(q)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment