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Add MERGE TODO.detail:

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>   [merge]
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>   [merge]
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Bruce Momjian
2005-12-01 22:12:35 +00:00
parent f28bdd95c1
commit 915fb7f687
2 changed files with 6 additions and 2 deletions
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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