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h2database
Commits
2fd7815c
提交
2fd7815c
authored
1月 15, 2015
作者:
Thomas Mueller
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差异文件
New connection setting "REUSE_SPACE".
上级
c722ed60
显示空白字符变更
内嵌
并排
正在显示
4 个修改的文件
包含
59 行增加
和
1 行删除
+59
-1
changelog.html
h2/src/docsrc/html/changelog.html
+5
-1
DbSettings.java
h2/src/main/org/h2/engine/DbSettings.java
+7
-0
MVTableEngine.java
h2/src/main/org/h2/mvstore/db/MVTableEngine.java
+3
-0
TestMVTableEngine.java
h2/src/test/org/h2/test/store/TestMVTableEngine.java
+44
-0
没有找到文件。
h2/src/docsrc/html/changelog.html
浏览文件 @
2fd7815c
...
...
@@ -17,7 +17,11 @@ Change Log
<h1>
Change Log
</h1>
<h2>
Next Version (unreleased)
</h2>
<ul><li>
Issue 587: MVStore: concurrent compaction and store operations could result in an IllegalStateException.
<ul><li>
New connection setting "REUSE_SPACE" (default: true). If disabled,
all changes are appended to the database file, and existing content is never overwritten.
This allows to rollback to a previous state of the database by truncating
the database file.
</li><li>
Issue 587: MVStore: concurrent compaction and store operations could result in an IllegalStateException.
</li><li>
Issue 594: Profiler.copyInThread does not work properly.
</li><li>
Script tool: Now, SCRIPT ... TO is always used (for higher speed and lower disk space usage).
</li><li>
Script tool: Fix parsing of BLOCKSIZE parameter, original patch by Ken Jorissen.
...
...
h2/src/main/org/h2/engine/DbSettings.java
浏览文件 @
2fd7815c
...
...
@@ -282,6 +282,13 @@ public class DbSettings extends SettingsBase {
*/
public
final
int
reconnectCheckDelay
=
get
(
"RECONNECT_CHECK_DELAY"
,
200
);
/**
* Database setting <code>REUSE_SPACE</code> (default: true).<br />
* If disabled, all changes are appended to the database file, and existing
* content is never overwritten. This setting has no effect if the database is already open.
*/
public
final
boolean
reuseSpace
=
get
(
"REUSE_SPACE"
,
true
);
/**
* Database setting <code>ROWID</code> (default: true).<br />
* If set, each table has a pseudo-column _ROWID_.
...
...
h2/src/main/org/h2/mvstore/db/MVTableEngine.java
浏览文件 @
2fd7815c
...
...
@@ -160,6 +160,9 @@ public class MVTableEngine implements TableEngine {
public
Store
(
Database
db
,
MVStore
.
Builder
builder
)
{
this
.
store
=
builder
.
open
();
if
(!
db
.
getSettings
().
reuseSpace
)
{
store
.
setReuseSpace
(
false
);
}
this
.
transactionStore
=
new
TransactionStore
(
store
,
new
ValueDataType
(
null
,
db
,
null
));
...
...
h2/src/test/org/h2/test/store/TestMVTableEngine.java
浏览文件 @
2fd7815c
...
...
@@ -9,6 +9,7 @@ import java.io.ByteArrayInputStream;
import
java.io.IOException
;
import
java.io.InputStream
;
import
java.math.BigDecimal
;
import
java.nio.channels.FileChannel
;
import
java.sql.Connection
;
import
java.sql.DriverManager
;
import
java.sql.PreparedStatement
;
...
...
@@ -48,6 +49,7 @@ public class TestMVTableEngine extends TestBase {
@Override
public
void
test
()
throws
Exception
{
testAppendOnly
();
testLowRetentionTime
();
testOldAndNew
();
testTemporaryTables
();
...
...
@@ -80,6 +82,48 @@ public class TestMVTableEngine extends TestBase {
testSimple
();
}
private
void
testAppendOnly
()
throws
Exception
{
deleteDb
(
"testAppendOnly"
);
Connection
conn
=
getConnection
(
"testAppendOnly"
);
Statement
stat
=
conn
.
createStatement
();
stat
.
execute
(
"set retention_time 0"
);
for
(
int
i
=
0
;
i
<
10
;
i
++)
{
stat
.
execute
(
"create table dummy"
+
i
+
" as select x, space(100) from system_range(1, 1000)"
);
stat
.
execute
(
"checkpoint"
);
}
stat
.
execute
(
"create table test as select x from system_range(1, 1000)"
);
conn
.
close
();
String
fileName
=
getBaseDir
()
+
"/testAppendOnly"
+
Constants
.
SUFFIX_MV_FILE
;
long
fileSize
=
FileUtils
.
size
(
fileName
);
conn
=
getConnection
(
"testAppendOnly;reuse_space=false"
);
stat
=
conn
.
createStatement
();
stat
.
execute
(
"set retention_time 0"
);
for
(
int
i
=
0
;
i
<
10
;
i
++)
{
stat
.
execute
(
"drop table dummy"
+
i
);
stat
.
execute
(
"checkpoint"
);
}
stat
.
execute
(
"alter table test alter column x rename to y"
);
stat
.
execute
(
"select y from test where 1 = 0"
);
stat
.
execute
(
"create table test2 as select x from system_range(1, 1000)"
);
conn
.
close
();
FileChannel
fc
=
FileUtils
.
open
(
fileName
,
"rw"
);
// undo all changes
fc
.
truncate
(
fileSize
);
conn
=
getConnection
(
"testAppendOnly"
);
stat
=
conn
.
createStatement
();
stat
.
execute
(
"select * from dummy0 where 1 = 0"
);
stat
.
execute
(
"select * from dummy9 where 1 = 0"
);
stat
.
execute
(
"select x from test where 1 = 0"
);
conn
.
close
();
}
private
void
testLowRetentionTime
()
throws
SQLException
{
deleteDb
(
"testLowRetentionTime"
);
Connection
conn
=
getConnection
(
...
...
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