Using func.sum(BinaryExp), returns a boolean instead of a sum (wasn't the case in 1.1.12)

Migrated issue, originally created by Bastien Gérard (@bagerard)

Hi, First of all, we are using MySQL 5.6

After switching from sqlalchemy 1.1.12 to 1.2.2, we observed that one of our test failed.

In fact the following scenario should return a RowProxy with the values being the sum but the values are boolean instead.

from sqlalchemy import select
from sqlalchemy.sql.functions import func

engine, tbl, col = ...
sel = select([func.sum(col.is_(None))])
print sel # SELECT sum(smart_result.signal_predicted IS NULL) AS sum_1 FROM smart_result
row = engine.execute(sel).fetchone()
print dict(row) # {u'sum_1': True}

# And if I execute it manually:
r = engine.execute('SELECT sum(smart_result.signal_predicted IS NULL) AS sum_1 FROM smart_result')
print r.fetchall() # [(Decimal('120'),)]

I don’t know if it could be related but by printing row._key_map, I see references to “<function sqlalchemy.cprocessors.int_to_boolean>”.

[sqlalchemy-bot]

Bastien Gérard (@bagerard) wrote:

As a workaround, note that the following works:

sel = select([func.sum(v.is_(None)).cast(Integer)])
row = engine.execute(sel).fetchone()

print dict(row) # {u'anon_1': 120L}

[sqlalchemy-bot]

Changes by Michael Bayer (@zzzeek):

• changed status to closed