提交 c11dc64e authored 作者: Thomas Mueller's avatar Thomas Mueller

Documentation.

上级 68c6d1f7
......@@ -18,7 +18,9 @@ Change Log
<h1>Change Log</h1>
<h2>Next Version (unreleased)</h2>
<ul><li>-
<ul><li>Version 1.2.137 could still not be converted to Java 1.4
(because the Retrotranslator doesn't support BigDecimal.precision).
</li><li>Cluster: non-admin users could not connect when one of the cluster node was stopped. Issue 206.
</li></ul>
<h2>Version 1.2.137 (2010-06-06)</h2>
......
......@@ -28,13 +28,18 @@ Installation
<h2 id="requirements">Requirements</h2>
<p>
To run the database, the following minimum software stack is known to work:
To run this database, the following software stack is known to work.
Other software most likely also works, but is not tested as much.
</p>
<ul>
<li>Windows XP or Vista, Mac OS X, or Linux
</li><li>Recommended Windows file system: NTFS (FAT32 only supports files up to 4 GB)
</li><li>Sun JDK 1.5 or newer
</li><li>Mozilla Firefox
<h3>Database Engine</h3>
<ul><li>Windows XP or Vista, Mac OS X, or Linux
</li><li>Sun JDK 1.5 or newer (using Retroweaver to convert to JDK 1.4 should work, but is not regularly tested)
</li><li>Recommended Windows file system: NTFS (FAT32 only supports files up to 4 GB)
</li></ul>
<h3>H2 Console</h3>
<ul><li>Mozilla Firefox
</li></ul>
<h2 id="supported_platforms">Supported Platforms</h2>
......@@ -42,7 +47,7 @@ To run the database, the following minimum software stack is known to work:
As this database is written in Java, it can run on many different platforms.
It is tested with Java 1.5 and 1.6 but can also be compiled to native code using GCJ.
The source code does not use features of Java 1.6. Currently, the database is
developed and tested on Windows XP and Mac OS X using the Sun JDK 1.5, but it also
developed and tested on Windows XP and Mac OS X using the Sun JDK 1.6, but it also
works in many other operating systems and using other Java runtime environments.
</p>
......
......@@ -37,7 +37,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
<h2>Priority 1</h2>
<ul><li>Bugfixes
</li><li>Support very large transactions. Reduce memory usage of undo log (TestUndoLogMemory).
</li><li>More tests with MULTI_THREADED=1
</li><li>Optimization: result set caching (like MySQL); option to disable
</li><li>Server side cursors
......@@ -71,6 +70,8 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Implement, test, document XAConnection and so on.
</li><li>Pluggable data type (for streaming, hashing, compression, validation, conversion, encryption).
</li><li>CHECK: find out what makes CHECK=TRUE slow, move to CHECK2.
</li><li>Drop with invalidate views (so that source code is not lost). Check what other databases do exactly.
</li><li>Drop with restrict (currently cascade is the default).
</li><li>Index usage for (ID, NAME)=(1, 'Hi'); document.
</li><li>Make DDL (Data Definition) operations transactional.
</li><li>RANK() and DENSE_RANK(), Partition using OVER().
......@@ -94,7 +95,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>Implement missing JDBC API (CallableStatement,...).
</li><li>Compression of the cache.
</li><li>Include SMPT (mail) client (alert on cluster failure, low disk space,...).
</li><li>Drop with restrict (currently cascade is the default).
</li><li>JSON parser and functions.
</li><li>Server: client ping from time to time (to avoid timeout - is timeout a problem?).
</li><li>Copy database: tool with config GUI and batch mode, extensible (example: compare).
......
Nested Outer Joins
-----------------
Example:
drop table a, b, c;
create table a(x int primary key);
insert into a values(0), (1);
create table b(x int primary key);
insert into b values(0);
create table c(x int primary key);
select * from a left outer join b on a.x = b.x inner join c on b.x = c.x;
select * from a left outer join b on a.x = b.x left outer join c on b.x = c.x;
select * from a left outer join (b inner join c on b.x = c.x) on a.x = b.x;
select a.x, b_x, c_x from a left outer join (select b.x b_x, c.x c_x from b inner join c on b.x = c.x) on a.x = b_x;
drop table test;
create table test(id int primary key);
insert into test values(0), (1), (2);
select * from test a left outer join (test b inner join test c on b.id = c.id - 2) on a.id = b.id + 1;
select a.id, b_id, c_id from test a left outer join (select b.id b_id, c.id c_id from test b inner join test c on b.id = c.id - 2) on a.id = b_id + 1;
create table a(x int);
create table b(x int);
create table c(x int, y int);
......@@ -81,14 +99,6 @@ on 1=1;
-- PostgreSQL, MySQL, Derby, H2:
-- 1 1 3 3
drop table test;
create table test(id int primary key);
@loop 3 insert into test values(?);
select * from test a left outer join (test b inner join test c on b.id = c.id - 2) on a.id = b.id + 1;
select * from test a left outer join (select b.id, c.id from test b inner join test c on b.id = c.id - 2) on a.id = b.id + 1;
Auto Upgrade
-----------------
file conversion should be done automatically when the new engine connects.
......
Markdown 格式
0%
您添加了 0 到此讨论。请谨慎行事。
请先完成此评论的编辑!
注册 或者 后发表评论