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PostgreSQL TODO List
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====================
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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- Last updated: Thu Dec 1 17:07:44 EST 2005
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+ Last updated: Thu Dec 1 17:12:27 EST 2005
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The most recent version of this document can be viewed at
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http://www.postgresql.org/docs/faqs.TODO.html.
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* Add a GUC variable to warn about non-standard SQL usage in queries
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* Add SQL-standard MERGE command, typically used to merge two tables
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+ [merge]
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This is similar to UPDATE, then for unmatched rows, INSERT.
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Whether concurrent access allows modifications which could cause
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row loss is implementation independent.
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* Add REPLACE or UPSERT command that does UPDATE, or on failure, INSERT
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+ [merge]
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To implement this cleanly requires that the table have a unique index
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so duplicate checking can be easily performed. It is possible to
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< body bgcolor ="#FFFFFF " text ="#000000 " link ="#FF0000 " vlink ="#A00000 " alink ="#0000FF ">
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< h1 > < a name ="section_1 "> PostgreSQL TODO List</ a > </ h1 >
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< p > Current maintainer: Bruce Momjian (< a href ="mailto:pgman@candle.pha.pa.us "> pgman@candle.pha.pa.us</ a > )< br />
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- Last updated: Thu Dec 1 17:07:44 EST 2005
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+ Last updated: Thu Dec 1 17:12:27 EST 2005
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</ p >
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< p > The most recent version of this document can be viewed at< br />
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< a href ="http://www.postgresql.org/docs/faqs.TODO.html "> http://www.postgresql.org/docs/faqs.TODO.html</ a > .
@@ -340,11 +340,13 @@ <h1><a name="section_8">SQL Commands</a></h1>
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</ p >
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</ li > < li > Add a GUC variable to warn about non-standard SQL usage in queries
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</ li > < li > Add SQL-standard MERGE command, typically used to merge two tables
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+ [< a href ="http://momjian.postgresql.org/cgi-bin/pgtodo?merge "> merge</ a > ]
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< p > This is similar to UPDATE, then for unmatched rows, INSERT.
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Whether concurrent access allows modifications which could cause
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row loss is implementation independent.
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</ p >
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</ li > < li > Add REPLACE or UPSERT command that does UPDATE, or on failure, INSERT
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+ [< a href ="http://momjian.postgresql.org/cgi-bin/pgtodo?merge "> merge</ a > ]
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< p > To implement this cleanly requires that the table have a unique index
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so duplicate checking can be easily performed. It is possible to
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do it without a unique index if we require the user to LOCK the table
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