提交 e2ebe701 authored 作者: Thomas Mueller's avatar Thomas Mueller

Documentation.

上级 7a11b7b0
......@@ -300,8 +300,8 @@ jdbc:h2:~/test;MVCC=TRUE
MVCC is disabled by default. The MVCC feature is not fully tested yet.
The limitations of the MVCC mode are: it can not be used at the same time as
<code>MULTI_THREADED=TRUE</code>;
the complete undo log must fit in memory when using multi-version concurrency
(the setting <code>MAX_MEMORY_UNDO</code> has no effect).
the complete undo log (the list of uncommitted changes) must fit in memory when using multi-version concurrency.
The setting <code>MAX_MEMORY_UNDO</code> has no effect.
It is not possible to enable or disable this setting while the database is already open.
The setting must be specified in the first connection (the one that opens the database).
</p>
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......@@ -1383,6 +1383,14 @@ The exceptions are logged, but opening the database will continue.
<h2 id="computed_columns">Computed Columns / Function Based Index</h2>
<p>
A computed column is a column whose value is calculated before storing.
The formula is evaluated when the row is inserted, and re-evaluated every time the row is updated.
One use case is to automatically update the last-modification time:
</p>
<pre>
CREATE TABLE TEST(ID INT, NAME VARCHAR, LAST_MOD TIMESTAMP AS NOW());
</pre>
<p>
Function indexes are not directly supported by this database, but they can be emulated
by using computed columns. For example, if an index on the upper-case version of
a column is required, create a computed column with the upper-case version of the original column,
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......@@ -97,6 +97,7 @@ spread the word, and translated this project. Also many thanks to the donors:
</li><li><a href="http://skycash.com">SkyCash, Poland</a>
</li><li><a href="http://lumber-mill.co.jp">Lumber-mill, Inc., Japan</a>
</li><li><a href="http://www.stockmarketeye.com">StockMarketEye, USA</a>
</li><li><a href="http://www.eckenfelder.de">Eckenfelder GmbH & Co.KG, Germany</a>
</li><li>Alessio Jacopo D'Adamo, Italy
</li><li>Martin Wildam, Austria
</li><li>Ashwin Jayaprakash, USA
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......@@ -569,6 +569,7 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Issue 348: Oracle compatibility: division should return a decimal result.
</li><li>Read rows on demand: instead of reading the whole row, only read up to that column that is requested.
Keep an pointer to the data area and the column id that is already read.
</li><li>Long running transactions: log session id when detected.
</li></ul>
<h2>Not Planned</h2>
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......@@ -1625,7 +1625,7 @@ Next Version (unreleased)
-
@changelog_1003_h2
Version 1.3.161 (2011-10-28)
Version 1.3.162 (2011-11-26)
@changelog_1004_li
The following system properties are no longer supported: <code>h2.allowBigDecimalExtensions</code>, <code>h2.emptyPassword</code>, <code>h2.minColumnNameMap</code>, <code>h2.returnLobObjects</code>, <code>h2.webMaxValueLength</code>.
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......@@ -1625,7 +1625,7 @@ Centralリポジトリの利用
#-
@changelog_1003_h2
#Version 1.3.161 (2011-10-28)
#Version 1.3.162 (2011-11-26)
@changelog_1004_li
#The following system properties are no longer supported: <code>h2.allowBigDecimalExtensions</code>, <code>h2.emptyPassword</code>, <code>h2.minColumnNameMap</code>, <code>h2.returnLobObjects</code>, <code>h2.webMaxValueLength</code>.
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......@@ -540,7 +540,7 @@ build_1109_p=\ To generate railroad diagrams for other grammars, see the package
changelog_1000_h1=Change Log
changelog_1001_h2=Next Version (unreleased)
changelog_1002_li=-
changelog_1003_h2=Version 1.3.161 (2011-10-28)
changelog_1003_h2=Version 1.3.162 (2011-11-26)
changelog_1004_li=The following system properties are no longer supported\: <code>h2.allowBigDecimalExtensions</code>, <code>h2.emptyPassword</code>, <code>h2.minColumnNameMap</code>, <code>h2.returnLobObjects</code>, <code>h2.webMaxValueLength</code>.
changelog_1005_li=When using a VPN, starting a H2 server did not work (for some VPN software).
changelog_1006_li=Oracle compatibility\: support for DECODE(...).
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