On 01/03/2017 11:07 AM, Ravi Kapoor wrote:
>
> I have a bit strange question. I am trying to figure out how to avoid
> table locking while creating an index through Django (1.5.1) in Postgres
> 9.4.7
>
> Django 1.5.1 does not support concurrent indexing. So my thought is to
> first create a concurrent index using SQL prompt.
> Then try to update django model to add index, which will effectively
> create 2 indexes on same column.
I really need to read the entire subject. So in response to my own
question, yes it is on one column.
>
> So my questions are:
>
> If I create a 2nd index on one column,
> 1. Does postgres scan entire table to create index from scratch or does
> it simply copy the first index?
> 2. Does postgres lock the table to create this index?
>
> thanks
>
--
Adrian Klaver
adrian.klaver@aklaver.com