That doesn't address the lower(name) portion of the question, just the part
where it specifies btree. Any idea how to do the lowercase portion?
On Wednesday, July 3, 2013 2:30:38 PM UTC-4, Rick wrote:
>
> Direct from Rails4.0 ActiveRecord documentation:
>
> Creating an index with a specific method
>
> add_index(:developers, :name, using: 'btree')
>
> generates:
>
> CREATE INDEX index_developers_on_name ON developers USING btree (name) --
> PostgreSQLCREATE INDEX index_developers_on_name USING btree ON developers
> (name) -- MySQL
>
> Note: only supported by PostgreSQL and MySQL
>
>
> On Tuesday, July 2, 2013 1:13:15 PM UTC-4, Linus Pettersson wrote:
>>
>> Hi
>>
>> I'm sorting some columns like this: MyModel.order("LOWER(column) ASC")...
>> But these queries are quite slow. I'm on Postgres by the way.
>>
>> Does Rails support creating a lowercase index for these situations? I
>> know Postgres has support for it and I guess I can create one like this
>> (found on SO):
>>
>> execute "CREATE UNIQUE INDEX index_products_on_lower_name ON products USING
>> btree (lower(name));"
>>
>> But does Rails have support for creating it? Don't like to use execute()
>> if there is a better way :)
>>
>> Cheers,
>> Linus
>>
>
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