sqlalchemy's create_all doesn't create sequences automatically

5 days ago Jul 05, 2010  · I am using SQLAlchemy 0.4.8 with Postgres in order to manage my datastore. Until now, it's been fairly easy to automatically deploy my database: I was using metadata.create_all (bind=engine) and everything worked just fine. But now I am trying to create a sequence that it's not being used by any table, so create_all () doesn't create it, even ... ,I am using SQLAlchemy 0.4.8 with Postgres in order to manage my datastore. Until now, it's been fairly easy to automatically deploy my database: I was using metadata.create_all(bind=engine) and everything worked just fine. But now I am trying to create a sequence that it's not being used by any table, so create_all() doesn't create it, even though it's define correctly: Sequence('my_seq', metadata=myMetadata)., SQLAlchemy represents database sequences using the Sequence object, which is considered to be a special case of “column default”. It only has an effect on databases which have explicit support for sequences, which currently includes Postgresql, Oracle, and Firebird. , Deprecated since version 1.4: The MetaData.bindargument is deprecated and will be removed in SQLAlchemy 2.0. schema¶– The default schema to use for the Table, Sequence, and potentially other objects associated with this MetaData. Defaults to None.

my_seq = Sequence('my_seq', metadata = myMetadata) #...metadata.create_all(bind = engine) # @note: create unused objects explicitly my_seq.create(bind = engine) #...

Could you call the create it by using its own Sequence.create method:

my_seq = Sequence('my_seq', metadata = myMetadata) #...metadata.create_all(bind = engine) # @note: create unused objects explicitlymy_seq.create(bind = engine) #...

Do not include the snowflakecomputing.com domain name as part of your account identifier. Snowflake automatically appends the domain name to your account identifier to create the required connection.,<account_identifier> is your account identifier. See Account Identifiers. Note Do not include the snowflakecomputing.com domain name as part of your account identifier. Snowflake automatically appends the domain name to your account identifier to create the required connection. ,Connection Parameters Required Parameters Additional Connection Parameters Proxy Server Configuration Connection String Examples ,Replace <user_login_name>, <password>, and <account_identifier> with the appropriate values for your Snowflake account and user. For more details, see Connection Parameters (in this topic).

pip install--upgrade snowflake - sqlalchemy

#!/usr/bin/env python
from sqlalchemy import create_engine

engine = create_engine(
    'snowflake://{user}:{password}@{account_identifier}/'.format(
        user='<user_login_name>',
        password='<password>',
        account_identifier='<account_identifier>',
    )
)
try:
    connection = engine.connect()
    results = connection.execute('select current_version()').fetchone()
    print(results[0])
finally:
    connection.close()
    engine.dispose()

python validate.py

'snowflake://<user_login_name>:<password>@<account_identifier>'

'snowflake://<user_login_name>:<password>@<account_identifier>/<database_name>/<schema_name>?warehouse=<warehouse_name>&role=<role_name>'

from sqlalchemy
import create_engine
engine = create_engine(
   'snowflake://testuser1:0123456@myorganization-myaccount/testdb/public?warehouse=testwh&role=myrole'
)