Re: [HACKERS] identity columns

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От
Peter Eisentraut
Тема
Re: [HACKERS] identity columns
Дата
Msg-id
06a416db-e35b-36d1-7e2f-0affdee24745@2ndquadrant.com
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Дерево обсуждения
identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Robert Haas <robertmhaas@gmail.com>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Haribabu Kommi <kommi.haribabu@gmail.com>
Re: identity columns Haribabu Kommi <kommi.haribabu@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Andres Freund <andres@anarazel.de>
Re: identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Tom Lane <tgl@sss.pgh.pa.us>
Re: identity columns Andres Freund <andres@anarazel.de>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Noah Misch <noah@leadboat.com>
Re: [HACKERS] identity columns Noah Misch <noah@leadboat.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Noah Misch <noah@leadboat.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Robert Haas <robertmhaas@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Robert Haas <robertmhaas@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Robert Haas <robertmhaas@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Robert Haas <robertmhaas@gmail.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Robert Haas <robertmhaas@gmail.com>
Re: [HACKERS] identity columns Michael Paquier <michael.paquier@gmail.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Michael Paquier <michael.paquier@gmail.com>
Re: identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Re: [HACKERS] identity columns Vitaly Burovoy <vitaly.burovoy@gmail.com>
Re: [HACKERS] identity columns Michael Paquier <michael.paquier@gmail.com>
On 3/23/17 06:09, Vitaly Burovoy wrote:
> I think we'll end up with "DROP IDENTITY IF EXISTS" to avoid raising
> an exception and "ADD OR SET" if your grammar remains.

That sounds reasonable to me.

> Right. From that PoV IDENTITY also changes a default value: "SET (ADD
> ... AS?) IDENTITY" works as setting a default to "nextval(...)"
> whereas "DROP IDENTITY" works as setting it back to NULL.

But dropping and re-adding an identity destroys state, so it's not quite
the same.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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