I'm not familiar with any other style of index for this column type.  
If you can show me at
http://www.postgresql.org/docs/9.4/static/datatype-json.html or wherever
what specific DDL you're looking for, you can simply emit it using
engine.execute("<ddl>").


On 6/30/14, 11:02 PM, Phillip Aquilina wrote:
> Thanks for replying. I've read through that doc and I still don't see
> how that addresses my question. Is there somewhere in there that
> describes how to create an index on a json field?  It seems like to me
> it's simple to create an index on a column but this would be creating
> an index on nested data inside the column.
>
> - Phil
>
> On Monday, June 30, 2014 6:07:51 PM UTC-7, Michael Bayer wrote:
>
>     SQLAlchemy's API allows CREATE INDEX via the Index construct:
>     
> http://docs.sqlalchemy.org/en/rel_0_9/core/constraints.html?highlight=index#indexes
>     
> <http://docs.sqlalchemy.org/en/rel_0_9/core/constraints.html?highlight=index#indexes>
>
>
>     On 6/30/14, 6:21 PM, Phillip Aquilina wrote:
>>     Using postgresql, I have a JSON type column. My understanding
>>     from their docs was that only jsonb columns could have an index
>>     created on them (a feature of postgresql 9.4) but then I found an
>>     SO answer
>>     
>> <http://stackoverflow.com/questions/17807030/how-to-create-index-on-json-field-in-postgres-9-3>
>>  that
>>     said otherwise. I haven't had the chance to test it since I'm
>>     away from my dev environment, but the sqlalchemy docs seem to
>>     support this idea
>>     
>> <http://docs.sqlalchemy.org/en/rel_0_9/dialects/postgresql.html?highlight=json#sqlalchemy.dialects.postgresql.JSON>,
>>     mentioning the availability of "Index operations."
>>
>>     Unless I'm missing something obvious (very possible), it seems
>>     like this can be done through sql, but is there a way to create
>>     an index on a json field through the sqlalchemy api? I can't seem
>>     to find a way to do this.
>>
>>     Thanks,
>>     Phil
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