Re: BUG #14745: to_tsvector(regconfig, json[b]) is NOT immutable

On Sun, Jul 16, 2017 at 11:10 AM, <007reader(at)gmail(dot)com> wrote:

> The following bug has been logged on the website:
>
> Bug reference: 14745
> Logged by: Bob Jones
> Email address: 007reader(at)gmail(dot)com
> PostgreSQL version: 10beta2
> Operating system: Debian in Docker container
> Description:
>
> According to https://www.postgresql.org/about/news/1763/ Beta 2 marked
> to_tsvector(regconfig, json[b]) immutable, but it still doesn't work, at
> least in the docker version of Beta 2. Here is the result:
>
> create table test (j JSON, jb JSONB);
> CREATE TABLE
>
> create index j_ixd on test using gin(to_tsvector(j));
> ERROR: functions in index expression must be marked IMMUTABLE
>

to_tsvector(regconfig, json[b]) and to_tsvector(json[b]) are not the same
thing.

Only the first is immutable, you are using the second.

Cheers,

Jeff