Re: BUG #7620: array_to_json doesn't support heterogeneous arrays

On Oct 23, 2012, at 6:03 PM, Merlin Moncure <mmoncure(at)gmail(dot)com> wrote:

> On Tue, Oct 23, 2012 at 6:32 PM, <ghazel(at)gmail(dot)com> wrote:
>> The following bug has been logged on the website:
>>
>> Bug reference: 7620
>> Logged by: Greg Hazel
>> Email address: ghazel(at)gmail(dot)com
>> PostgreSQL version: 9.2.1
>> Operating system: Amazon Linux
>> Description:
>>
>> array_to_json(ARRAY['foo', 100, true]) complains because arrays can't have
>> mixed types, but json arrays can.
>>
>> So, it's not possible to form a heterogeneous json array, when this is often
>> desired.
>
> This is not really a bug because the feature is working as intended.
> Postgres arrays are homogonous so what you're asking really isn't
> possible. You can though use row_to_json to work around:
>
> select row_to_json(row('foo', 100, true));

That doesn't produce the same results.

Call it a feature request or a bug report, the postgres json support fails to make the json I need.

-Greg