Re: [HACKERS] "SQL sentence"?

On 2/17/17 10:46 PM, Alvaro Herrera wrote:
> Jim Nasby wrote:
>> On 2/17/17 10:19 PM, Alvaro Herrera wrote:
>>>> (FWIW, I'm wondering because I was just looking to see why there's no
>>>> details for things like altering a column in a table.)
>>> Do you mean you want to have access to the details of the alter table
>>> operations being executed?  There's no structured data for that; you
>>> need to write a C function to examine the pg_ddl_command opaque column.
>> Yeah. It doesn't seem unreasonable for a user to want to get at that info.
> Sure.  We have the extension that turned the command into JSON.  It's
> still an unfinished patch, sadly, even though Alex Shulgin spent a lot
> of effort trying to get it finished.  It is still missing a nontrivial
> amount of work, but within reach ISTM.

I wonder if there's some generic way we could make C structs to JSON. 
IIRC there's other places where that ability would be handly.
-- 
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)