提交 dd0d0e43 authored 作者: Thomas Mueller's avatar Thomas Mueller

Documentation

上级 ed51a17b
......@@ -17,17 +17,20 @@ Change Log
<h1>Change Log</h1>
<h2>Next Version (unreleased)</h2>
<ul><li>The database URL setting PAGE_SIZE setting is now also used for the MVStore.
<ul><li>Views and derived tables with equality and range conditions on the same columns
did not work properly. example: select x from (select x from (select 1 as x)
where x &gt; 0 and x &lt; 2) where x = 1
</li><li>The database URL setting PAGE_SIZE setting is now also used for the MVStore.
</li><li>MVStore: the default page split size for persistent stores is now 4096
(it was 16 KB so far). This should reduce the database file size for most situations
(in some cases, less than half the size of the previous version).
</li><li>With query literals disabled, auto-analyze of a table with CLOB or BLOB did not work.
</li><li>MVStore: use a mark & sweep GC algorithm instead of reference counting,
</li><li>MVStore: use a mark and sweep GC algorithm instead of reference counting,
to ensure used chunks are never overwrite, even if the reference counting
algorithm does not work properly.
</li><li>In the multi-threaded mode, updating the column selectivity ("analyze")
</li><li>In the multi-threaded mode, updating the column selectivity ("analyze")
in the background sometimes did not work.
</li><li>In the multi-threaded mode, database metadata operations
</li><li>In the multi-threaded mode, database metadata operations
did sometimes not work if the schema was changed at the same time
(for example, if tables were dropped).
</li><li>Some CLOB and BLOB values could no longer be read when
......
......@@ -144,7 +144,7 @@ JavaEE 5 open source framework for the development of complex and evolving (web-
<p><a href="https://github.com/arykov/jdbc-console">
JDBC Console</a><br />
This small webapp gives an ability to execute SQL against datasources bound in container's JNDI.
This small webapp gives an ability to execute SQL against datasources bound in container's JNDI.
Based on H2 Console.
</p>
......
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