From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Manfred Koizar <mkoi-pg(at)aon(dot)at> |
Cc: | Christoph Haller <ch(at)rodos(dot)fzk(dot)de>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Efficient DELETE Strategies |
Date: | 2002-06-12 14:49:26 |
Message-ID: | 9663.1023893366@sss.pgh.pa.us |
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Lists: | pgsql-sql |
Manfred Koizar <mkoi-pg(at)aon(dot)at> writes:
> Oracle basically supports (with slight variations between releases
> 7/8/9):
> DELETE [FROM] { table
> | view
> | ( subquery )
> }
> [alias] [WHERE ...] [returning_clause]
Bizarre. How are you supposed to delete from a subquery?
> According to the "SQL Quick Syntax Guide" the WHERE clause is not
> optional. Does anybody know, if this is a documentation bug?
Probably. SQL92 saith:
<delete statement: searched> ::=
DELETE FROM <table name>
[ WHERE <search condition> ]
<delete statement: positioned> ::=
DELETE FROM <table name>
WHERE CURRENT OF <cursor name>
so I could see where a sloppy reader might get confused...
regards, tom lane
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