sqlalchemy.exc.DataError: (psycopg2.DataError) integer out of range

[Chengjun JIN]

Hi all,

I am trying to save data into postgresql via sqlchemy ORM. I encountered an error below: sqlalchemy.exc.DataError: (psycopg2.DataError) integer out of range

I pinpoint the place where it goes wrong. I have a large number which is 2468432255.0. If I change to smaller number like 468432255.0, then it works.

The thing confused me is that: I define the column as volume = Column(Numeric). As far as I understand, Numeric should be able to handle this large number.  Additionally, I tried other data type like BigInt etc... They all gave me the same error.

Any idea?

Thanks,

Chengjun

[Mike Bayer]

I can't reproduce that.  Here's a test:

from sqlalchemy import create_engine, Numeric, MetaData, Table, Column

m = MetaData()
t = Table('x', m, Column('data', Numeric))
e = create_engine("postgresql://scott:tiger@localhost/test", echo=True)
c = e.connect()
tr = c.begin()
m.create_all(c)

c.execute(
    t.insert(),
    {"data": 2468432255.0}
)



What is the actual NUMERIC type in the schema?  If you make a NUMERIC type with too low of a precision/scale, the number will be rejected.  example:

from sqlalchemy import create_engine, Numeric, MetaData, Table, Column

m = MetaData()
t = Table('x', m, Column('data', Numeric(6, 2)))
e = create_engine("postgresql://scott:tiger@localhost/test", echo=True)
c = e.connect()
tr = c.begin()
m.create_all(c)

c.execute(
    t.insert(),
    {"data": 2468432255.0}
)


output:

sqlalchemy.exc.DataError: (psycopg2.DataError) numeric field overflow
DETAIL:  A field with precision 6, scale 2 must round to an absolute value less than 10^4.
 [SQL: 'INSERT INTO x (data) VALUES (%(data)s)'] [parameters: {'data': 2468432255.0}]



Please adapt the test above to illustrate how you're getting your error exactly. 

Any idea?

Thanks,

Chengjun

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[Chengjun JIN]

Hi Michael,

Thanks for your time.

I have figured out the problem. My error is not related to the data type, as you pointed out. It is related to the definition of the TABLE column repeatedly and inconsistently (meaning: initially I define the column as Integer in the database, then I changed to Numeric but it is not changed, due to my bad coding).

Regards,

Chengjun