提交 2508d2a2 authored 作者: Thomas Mueller's avatar Thomas Mueller

Documentation.

上级 f98f5db6
......@@ -1612,6 +1612,8 @@ Identity and auto-increment columns are columns with a sequence as the
default. The column declared as the identity columns is implicitly the
primary key column of this table (unlike auto-increment columns).
The options PRIMARY KEY, UNIQUE, and CHECK are not supported for ALTER statements.
Check constraints can reference columns of the table,
and they can reference objects that exist while the statement is executed.
Conditions are only checked when a row is added or modified
......
......@@ -18,7 +18,14 @@ Change Log
<h1>Change Log</h1>
<h2>Next Version (unreleased)</h2>
<ul><li>MySQL compatibility: support for CONCAT_WS.
<ul><li>Issue 407: The TriggerAdapter didn't work with CLOB and BLOB columns.
</li><li>PostgreSQL compatibility: support for data types BIGSERIAL and SERIAL
as an alias for AUTO_INCREMENT.
</li><li>Issue 417: H2 Console: the web session timeout didn't work, resulting in a memory leak.
This was only a problem if the H2 Console was run for a long time and many sessions were opened.
</li><li>Issue 412: Running the Server tool with just the option "-browser" will now log a warning.
</li><li>Issue 411: CloseWatcher registration was not concurency-safe.
</li><li>MySQL compatibility: support for CONCAT_WS.
Thanks a lot to litailang for the patch!
</li><li>PostgreSQL compatibility: support for EXTRACT(WEEK FROM dateColumn).
Thanks to Prashant Bhat for the patch!
......
......@@ -186,6 +186,8 @@ Areas considered experimental are:
</p>
<ul>
<li>The PostgreSQL server
</li><li>Clustering (there are cases were transaction isolation can be broken
due to timing issues, for example one session overtaking another session).
</li><li>Multi-threading within the engine using <code>SET MULTI_THREADED=1</code>.
</li><li>Compatibility modes for other databases (only some features are implemented).
</li><li>The soft reference cache (<code>CACHE_TYPE=SOFT_LRU</code>). It might not improve performance,
......
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