Re: SQL/JSON path issues/questions

On 7/3/19 11:59 PM, Alexander Korotkov wrote:
> Hi!
>
> On Wed, Jul 3, 2019 at 5:27 PM Liudmila Mantrova
> <l(dot)mantrova(at)postgrespro(dot)ru> wrote:
>> I have rechecked the standard and I agree that we should use "filter
>> expression" whenever possible.
>> "A filter expression must be enclosed in parentheses..." looks like an
>> oversight, so I fixed it. As for what's actually enclosed, I believe we
>> can still use the word "condition" here as it's easy to understand and
>> is already used in our docs, e.g. in description of the WHERE clause
>> that serves a similar purpose.
>> The new version of the patch fixes the terminology, tweaks the examples,
>> and provides some grammar and style fixes in the jsonpath-related chapters.
>
> It looks good to me. But this sentence looks a bit too complicated.
>
> "It can be followed by one or more accessor operators to define the
> JSON element on a lower nesting level by which to filter the result."
>
> Could we phrase this as following?
>
> "In order to filter the result by values lying on lower nesting level,
> @ operator can be followed by one or more accessor operators."
>
> ------
> Alexander Korotkov
> Postgres Professional: http://www.postgrespro.com
> The Russian Postgres Company

Thank  you!

I think we can make this sentence even shorter, the fix is attached:

"To refer to a JSON element stored at a lower nesting level, add one or
more accessor operators after <literal>@</literal>."

--
Liudmila Mantrova
Technical writer at Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company