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体验新版 GitCode,发现更多精彩内容 >>
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915fb7f6
编写于
12月 01, 2005
作者:
B
Bruce Momjian
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Add MERGE TODO.detail:
> [merge] 378a380 > [merge]
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doc/TODO
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doc/src/FAQ/TODO.html
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doc/TODO
浏览文件 @
915fb7f6
...
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@@ -2,7 +2,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Thu Dec 1 17:
07:44
EST 2005
Last updated: Thu Dec 1 17:
12:27
EST 2005
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
...
...
@@ -370,12 +370,14 @@ SQL Commands
* Add a GUC variable to warn about non-standard SQL usage in queries
* Add SQL-standard MERGE command, typically used to merge two tables
[merge]
This is similar to UPDATE, then for unmatched rows, INSERT.
Whether concurrent access allows modifications which could cause
row loss is implementation independent.
* Add REPLACE or UPSERT command that does UPDATE, or on failure, INSERT
[merge]
To implement this cleanly requires that the table have a unique index
so duplicate checking can be easily performed. It is possible to
...
...
doc/src/FAQ/TODO.html
浏览文件 @
915fb7f6
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@@ -8,7 +8,7 @@
<body
bgcolor=
"#FFFFFF"
text=
"#000000"
link=
"#FF0000"
vlink=
"#A00000"
alink=
"#0000FF"
>
<h1><a
name=
"section_1"
>
PostgreSQL TODO List
</a></h1>
<p>
Current maintainer: Bruce Momjian (
<a
href=
"mailto:pgman@candle.pha.pa.us"
>
pgman@candle.pha.pa.us
</a>
)
<br/>
Last updated: Thu Dec 1 17:
07:44
EST 2005
Last updated: Thu Dec 1 17:
12:27
EST 2005
</p>
<p>
The most recent version of this document can be viewed at
<br/>
<a
href=
"http://www.postgresql.org/docs/faqs.TODO.html"
>
http://www.postgresql.org/docs/faqs.TODO.html
</a>
.
...
...
@@ -340,11 +340,13 @@ first.
</p>
</li><li>
Add a GUC variable to warn about non-standard SQL usage in queries
</li><li>
Add SQL-standard MERGE command, typically used to merge two tables
[
<a
href=
"http://momjian.postgresql.org/cgi-bin/pgtodo?merge"
>
merge
</a>
]
<p>
This is similar to UPDATE, then for unmatched rows, INSERT.
Whether concurrent access allows modifications which could cause
row loss is implementation independent.
</p>
</li><li>
Add REPLACE or UPSERT command that does UPDATE, or on failure, INSERT
[
<a
href=
"http://momjian.postgresql.org/cgi-bin/pgtodo?merge"
>
merge
</a>
]
<p>
To implement this cleanly requires that the table have a unique index
so duplicate checking can be easily performed. It is possible to
do it without a unique index if we require the user to LOCK the table
...
...
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