oh other way around, you want BIGSERIAL
make yourself a BIGSERIAL type.
from sqlalchemy import Column
from sqlalchemy import create_engine
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import Table
from sqlalchemy import types as sqltypes
class BIGSERIAL(sqltypes.UserDefinedType):
def get_col_spec(self, **kw):
return "BIGSERIAL"
m = MetaData()
t = Table("t", m, Column("x", BIGSERIAL), Column("y", Integer))
e = create_engine("postgresql://scott:tiger@localhost/test", echo=True)
m.create_all(e)
On Wed, Sep 30, 2020, at 4:21 AM, Павел Фролов wrote:
> Thank you for the answer, but how it can help...
> I tried, but I NEED autoincrement (SERIAL in postgres), NO NEED primary key
> on this, particular column.
>
> Also I tried with Sequence and without autoincrement:
> Column('id', BIGINT, sa.Sequence('test_seq'), autoincrement=False,
> nullable=False)
> no result too.
> I *need* to get:
> [sql] id BIGSERIAL
> but *got*:
> [sql] id BIGINT
> I found some *workaround*, but *with warning*:
> t = Table(
> 'outputs', metadata,
> Column('id', BIGINT, primary_key=True, autoincrement=True, nullable=False)
> *# Partitioning columns*
> Column('run_id', None, ForeignKey('runs.id', onupdate='CASCADE',
> ondelete='CASCADE'), nullable=False, index=True),
> Column('hotel', Integer, nullable=False),
> sa.PrimaryKeyConstraint('id', 'hotel', 'run_id'),
> postgresql_partition_by='range(hotel, run_id)'
> )
> in this case I got exactly what I want:
> CREATE TABLE me_hotels_bc_fb_prediction_steps_outputs (
> id BIGSERIAL NOT NULL,
> run_id INTEGER NOT NULL,
> hotel INTEGER NOT NULL,
> PRIMARY KEY (id, hotel, run_id),
> FOREIGN KEY(run_id) REFERENCES runs (id) ON DELETE CASCADE ON UPDATE CASCADE
> )
> PARTITION BY range(hotel, run_id)
>
> *warning*:
> sqlalchemy/sql/schema.py:3615: SAWarning:
>
> Table 'outputs' specifies columns 'id' as primary_key=True, not matching
> locally specified columns 'id', 'hotel', 'run_id'; setting the current
> primary key columns to 'id', 'hotel', 'run_id'. This warning may become an
> exception in a future release
>
> вторник, 29 сентября 2020 г. в 21:05:47 UTC+4, Mike Bayer:
>> __
>> set autoincrement=False in the Column definition
>>
>> Column('id', BIGINT, autoincrement=False)
>>
>>
>>
>> On Tue, Sep 29, 2020, at 3:49 PM, Павел Фролов wrote:
>>> Hi all,
>>>
>>> I need just autoincrement without primary key, like:
>>>
>>> CREATE TABLE test (
>>> id BIGSERIAL NOT NULL,
>>> run_id INTEGER NOT NULL
>>> );
>>>
>>> How it's do with sqlalchemy core?
>>>
>>> I tried:
>>>
>>> sa.Column('id', sa.BIGINT(), sa.Sequence('test_seq')),
>>> or
>>> sa.Column('id', sa.BIGINT(), autoincrement=True),
>>> ->
>>> id BIGINT,
>>> (no serial)
>>>
>>> I see in docs that autoincrement can be only with primary key.
>>>
>>> I asked docs and google - can not find solution.
>>>
>>> --
>>> SQLAlchemy -
>>> The Python SQL Toolkit and Object Relational Mapper
>>>
>>> http://www.sqlalchemy.org/
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>>
>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
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SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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