Non-standard SQL generated in column definition for nullable columns in create table DDL (rails 2.1)
Reported by Praveen Devarao | June 12th, 2008 @ 01:21 AM
In migrations create table generates non-standard SQL which breaks functioning of sql standard compliant databases. The create table method
create_table :accounts, :force => true do |t|
t.integer :firm_id
t.integer :credit_limit
end
generates the sql as below
CREATE TABLE accounts (id ...., firm_id integer DEFAULT NULL NULL, credit_limit integer DEFAULT NULL NULL)
Focussing on 'DEFAULT NULL NULL', the last NULL is not standard SQL syntax compliant and hence will not work for DB2 and Oracle.
This can be tested here
http://developer.mimer.com/valid...
basically compliant sql syntax is 'COLNAME TYPE DEFAULT CONSTRAINTS'. Constraints is category that this falls into. 'NOT NULL' is a valid constraint, 'NULL' is not.
Comments and changes to this ticket
-
Praveen Devarao June 15th, 2008 @ 09:56 AM
- → Assigned user cleared.
-
Repository August 23rd, 2008 @ 12:22 PM
- → State changed from “new” to “resolved”
- → Tag cleared.
(from [74c3c701f73407a5bb1a11be2b5b221fe39895d3]) Don't set "NULL" as a constraint on nullable columns [#398 state:resolved]
This is already the default and adding it breaks SQL standards compatibility. http://github.com/rails/rails/co...
-
Repository August 25th, 2008 @ 03:26 AM
(from [ddb8c9c92ed09d33ae573891a4ef0d566622f317]) Don't set "NULL" as a constraint on nullable columns [#398 state:resolved]
This is already the default and adding it breaks SQL standards compatibility.
Conflicts:
activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
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