Skip to content
项目
群组
代码片段
帮助
正在加载...
帮助
为 GitLab 提交贡献
登录/注册
切换导航
H
h2database
项目
项目
详情
活动
周期分析
仓库
仓库
文件
提交
分支
标签
贡献者
分枝图
比较
统计图
议题
0
议题
0
列表
看板
标记
里程碑
合并请求
0
合并请求
0
CI / CD
CI / CD
流水线
作业
计划
统计图
Wiki
Wiki
代码片段
代码片段
成员
成员
折叠边栏
关闭边栏
活动
分枝图
统计图
创建新议题
作业
提交
议题看板
打开侧边栏
Administrator
h2database
Commits
f7bcb753
提交
f7bcb753
authored
9月 25, 2010
作者:
Thomas Mueller
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
Documentation.
上级
3e2b459c
隐藏空白字符变更
内嵌
并排
正在显示
4 个修改的文件
包含
36 行增加
和
4 行删除
+36
-4
advanced.html
h2/src/docsrc/html/advanced.html
+16
-0
changelog.html
h2/src/docsrc/html/changelog.html
+17
-1
roadmap.html
h2/src/docsrc/html/roadmap.html
+2
-2
tutorial.html
h2/src/docsrc/html/tutorial.html
+1
-1
没有找到文件。
h2/src/docsrc/html/advanced.html
浏览文件 @
f7bcb753
...
...
@@ -885,6 +885,22 @@ share, two processes (running on different computers) could still open the same
database files, if they do not have a direct TCP/IP connection.
</p>
<h3>
File Locking Method 'FS'
</h3>
<p>
This database file locking mechanism uses native file system lock on the database file.
No *.lock.db file is created in this case, and no background thread is started.
This mechanism may not work on all systems as expected.
Some systems allow to lock the same file multiple times within the same virtual machine,
and on some system native file locking is not supported or files are not unlocked after a power failure.
</p>
<p>
To enable this feature, append
<code>
;FILE_LOCK=FS
</code>
to the database URL.
</p>
<p>
This feature is relatively new. When using it for production, please ensure
your system does in fact lock files as expected.
</p>
<h2
id=
"file_locking_serialized"
>
File Locking Method 'Serialized'
</h2>
<p>
This locking mode allows to open multiple connections to the same database.
...
...
h2/src/docsrc/html/changelog.html
浏览文件 @
f7bcb753
...
...
@@ -18,7 +18,23 @@ Change Log
<h1>
Change Log
</h1>
<h2>
Next Version (unreleased)
</h2>
<ul><li>
-
<ul><li>
Performance has been improved a bit.
</li><li>
DatabaseMetaData.getJDBCMajorVersion now returns 4 (instead of 3) when the driver
is compiled with Java 6 (the default).
</li><li>
Re-added the internal utility class BitField which improves performance of opening
and closing a database (because it supports setByte / getByte, unlike java.util.BitSet).
</li><li>
INFORMATION_SCHEMA.SESSIONS: the start time of a SQL statement
is no longer set in each case. It is only set for long running statements.
This change should improve performance a bit on some devices, specially when using Android.
</li><li>
A old databases without user name and password (created with H2 version 1.2.142 or older)
couldn't be opened with version 1.2.143. Fixed.
</li><li>
The database upgrade classes have been renamed.
</li><li>
The database did not automatically upgrade when using a connection pool or data source.
</li><li>
JaQu: a database object can now also be created using a DataSource. Issue 227.
</li><li>
The built-in profiler now better supports the Dalvik VM.
</li><li>
The jarSmall build target no longer includes assertions
(SysProperties.CHECK, CHECK2, system properties h2.check and h2.check2).
</li><li>
The jarSmall build target excluded the DbUpgrade classes by mistake.
</li></ul>
<h2>
Version 1.2.143 (2010-09-18)
</h2>
...
...
h2/src/docsrc/html/roadmap.html
浏览文件 @
f7bcb753
...
...
@@ -78,6 +78,7 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>
Write more tests and documentation for MVCC (Multi Version Concurrency Control).
</li><li>
Find a tool to view large text file (larger than 100 MB), with find, page up and down (like less), truncate before / after.
</li><li>
Implement, test, document XAConnection and so on.
</li><li>
Issue 159: System property for the H2 Console and TCP configuration (which .h2.server.properties and .h2.keystore to use).
</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.
...
...
@@ -134,6 +135,7 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>
Max memory rows / max undo log size: use block count / row size not row count.
</li><li>
Support 123L syntax as in Java; example: SELECT (2000000000*2).
</li><li>
Implement point-in-time recovery.
</li><li>
Option for SCRIPT to only process one or a set of schemas or tables, and append to a file.
</li><li>
LIKE: improved version for larger texts (currently using naive search).
</li><li>
Automatically convert to the next 'higher' data type whenever there is an overflow.
</li><li>
Throw an exception when the application calls getInt on a Long (optional).
...
...
@@ -156,7 +158,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>
Add a sample application that runs the H2 unit test and writes the result to a file (so it can be included in the user app).
</li><li>
Count on a column that can not be null could be optimized to COUNT(*).
</li><li>
Table order: ALTER TABLE TEST ORDER BY NAME DESC (MySQL compatibility).
</li><li>
Issue 159: System property for the H2 Console and TCP configuration (which .h2.server.properties and .h2.keystore to use).
</li><li>
Backup tool should work with other databases as well.
</li><li>
Console: -ifExists doesn't work for the console. Add a flag to disable other dbs.
</li><li>
Check if 'FSUTIL behavior set disablelastaccess 1' improves the performance (fsutil behavior query disablelastaccess).
...
...
@@ -205,7 +206,6 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
</li><li>
Support OUTER UNION
</li><li>
Support parameterized views (similar to CSVREAD, but using just SQL for the definition)
</li><li>
A way (JDBC driver) to map an URL (jdbc:h2map:c1) to a connection object
</li><li>
Option for SCRIPT to only process one or a set of tables, and append to a file
</li><li>
Support linked tables to the current database
</li><li>
Support dynamic linked schema (automatically adding/updating/removing tables)
</li><li>
Clustering: adding a node should be very fast and without interrupting clients (very short lock)
...
...
h2/src/docsrc/html/tutorial.html
浏览文件 @
f7bcb753
...
...
@@ -739,7 +739,7 @@ Reasons to use H2 instead of SQLite are:
</li><li>
Streaming API for BLOB and CLOB data.
</li><li>
Fulltext search.
</li><li>
Multiple connections.
</li><li>
User defined functions
,
triggers.
</li><li>
User defined functions
and
triggers.
</li><li>
Database file encryption.
</li><li>
Reading and writing CSV files (this feature can be used out side the database as well).
</li><li>
Referential integrity and check constraints.
...
...
编写
预览
Markdown
格式
0%
重试
或
添加新文件
添加附件
取消
您添加了
0
人
到此讨论。请谨慎行事。
请先完成此评论的编辑!
取消
请
注册
或者
登录
后发表评论