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Update SQL features/conformance information to SQL:2016

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Peter Eisentraut
2019-05-14 14:56:58 +02:00
parent eb3a1376c9
commit 037165ca95
4 changed files with 56 additions and 11 deletions
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16
doc/src/sgml/features.sgml
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@ -14,10 +14,10 @@
<para>
The formal name of the SQL standard is ISO/IEC 9075 <quote>Database
Language SQL</quote>. A revised version of the standard is released
from time to time; the most recent update appearing in 2011.
The 2011 version is referred to as ISO/IEC 9075:2011, or simply as SQL:2011.
The versions prior to that were SQL:2008, SQL:2006, SQL:2003, SQL:1999,
and SQL-92. Each version
from time to time; the most recent update appearing in 2016.
The 2016 version is referred to as ISO/IEC 9075:2016, or simply as SQL:2016.
The versions prior to that were SQL:2011, SQL:2008, SQL:2006, SQL:2003,
SQL:1999, and SQL-92. Each version
replaces the previous one, so claims of conformance to earlier
versions have no official merit.
<productname>PostgreSQL</productname> development aims for
@ -79,18 +79,18 @@
</para>
<para>
PostgreSQL supports most of the major features of SQL:2011. Out of
PostgreSQL supports most of the major features of SQL:2016. Out of
179 mandatory features required for full Core conformance,
PostgreSQL conforms to at least 160. In addition, there is a long
list of supported optional features. It might be worth noting that at
the time of writing, no current version of any database management
system claims full conformance to Core SQL:2011.
system claims full conformance to Core SQL:2016.
</para>
<para>
In the following two sections, we provide a list of those features
that <productname>PostgreSQL</productname> supports, followed by a
list of the features defined in <acronym>SQL:2011</acronym> which
list of the features defined in <acronym>SQL:2016</acronym> which
are not yet supported in <productname>PostgreSQL</productname>.
Both of these lists are approximate: There might be minor details that
are nonconforming for a feature that is listed as supported, and
@ -133,7 +133,7 @@
<title>Unsupported Features</title>
<para>
The following features defined in <acronym>SQL:2011</acronym> are not
The following features defined in <acronym>SQL:2016</acronym> are not
implemented in this release of
<productname>PostgreSQL</productname>. In a few cases, equivalent
functionality is available.