Re: [HACKERS] Table aliases in delete statements?
| От | Tom Lane |
|---|---|
| Тема | Re: [HACKERS] Table aliases in delete statements? |
| Дата | |
| Msg-id | 25765.944634473@sss.pgh.pa.us обсуждение |
| Ответ на | Table aliases in delete statements? (Keith Parks <emkxp01@mtcc.demon.co.uk>) |
| Ответы |
Re: [HACKERS] Table aliases in delete statements?
|
| Список | pgsql-hackers |
Keith Parks <emkxp01@mtcc.demon.co.uk> writes:
> Is there any reason for not allowing table aliases in
> delete statements?
Not much, I suppose, but it's not in SQL92:
<delete statement: searched> ::= DELETE FROM <table name> [ WHERE <search condition>
]
The expansion of <table name> doesn't mention anything about aliases.
As Bruce points out in another followup, there's no real need for
an alias for the target table; if you have sub-selects that need
independent references to the target, you can always alias *them*.
The same goes for INSERT and UPDATE, which also take unadorned
<table name> as the target table specification.
regards, tom lane
В списке pgsql-hackers по дате отправления: