I am using SQLAlchemy and postgres database.
I want to do "Delete and Insert operation" on the table in a single
transaction *without using orm.*
Say
*table User*
Column | Type | Modifiers
--------+-------------------+---------------------------------------------------
id | integer | not null default
nextval('test_id_seq'::regclass)
name | character varying |
All users from table are retrieved and displayed at small time
interval.(2 secs)
say u1,u2,u3 are current users in DB.
Updated user list is u3,u4,u5.
Now i have to delete [u1,u2 ] & add [u4,u5]. This deletion and addition of
users should be in single transaction so that
users retrieved/displayed from table are either [u1,u2,u3] or [u3,u4,u5] .
And to avoid retrieval of transitional list of users say [ u1 ] (after
deletion).
In the similar steps it is required to do bulk deletion and bulk addition
in a single transaction.
Thanks
Santosh
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