Re: pgsql: JSON_TABLE

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От Erik Rijkers
Тема Re: pgsql: JSON_TABLE
Дата
Msg-id bd76a661-51eb-6bc2-a2c2-cf226017093a@xs4all.nl
обсуждение исходный текст
Ответ на pgsql: JSON_TABLE  (Andrew Dunstan <andrew@dunslane.net>)
Ответы Re: pgsql: JSON_TABLE  (Andrew Dunstan <andrew@dunslane.net>)
Re: pgsql: JSON_TABLE  (Oleg Bartunov <obartunov@postgrespro.ru>)
Список pgsql-committers
Op 04-04-2022 om 22:23 schreef Andrew Dunstan:
> JSON_TABLE

Great that this is now committed!

I notice one changed item: the NESTED-PATH-phrase does not accept an 
alias anymore.  The JSON_PATH v59 patches still had:

| NESTED PATH json_path_specification [ AS path_name ]
   COLUMNS ( json_table_column [, ...] )

My complaint is only half-hearted because I don't really understand what 
the use of such nested-path aliases are.  But it's a change from the 
earlier patch, and the nested-path aliases are used too in the
2017-03 'Technical report ISO/IEC TR 19075-6', which is as near I have 
to a SQL Standard description.

FWIW, I attach example sql+data from that .pdf from ISO (which is not 
online anymore).


Thanks,

Erik Rijkers












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