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h2database
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bbea3c39
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bbea3c39
authored
9 年前
作者:
S.Vladykin
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差异文件
Session local view index cache.
上级
2e613734
隐藏空白字符变更
内嵌
并排
正在显示
2 个修改的文件
包含
23 行增加
和
36 行删除
+23
-36
Session.java
h2/src/main/org/h2/engine/Session.java
+9
-1
TableView.java
h2/src/main/org/h2/table/TableView.java
+14
-35
没有找到文件。
h2/src/main/org/h2/engine/Session.java
浏览文件 @
bbea3c39
...
...
@@ -19,6 +19,7 @@ import org.h2.command.Prepared;
import
org.h2.command.dml.SetTypes
;
import
org.h2.constraint.Constraint
;
import
org.h2.index.Index
;
import
org.h2.index.ViewIndex
;
import
org.h2.jdbc.JdbcConnection
;
import
org.h2.message.DbException
;
import
org.h2.message.Trace
;
...
...
@@ -111,6 +112,7 @@ public class Session extends SessionWithState {
private
long
modificationMetaID
=
-
1
;
private
SubQueryInfo
subQueryInfo
;
private
int
parsingView
;
private
SmallLRUCache
<
Object
,
ViewIndex
>
viewIndexCache
;
/**
* Temporary LOBs from result sets. Those are kept for some time. The
...
...
@@ -1313,6 +1315,13 @@ public class Session extends SessionWithState {
}
}
public
SmallLRUCache
<
Object
,
ViewIndex
>
getViewIndexCache
()
{
if
(
viewIndexCache
==
null
)
{
viewIndexCache
=
SmallLRUCache
.
newInstance
(
Constants
.
VIEW_INDEX_CACHE_SIZE
);
}
return
viewIndexCache
;
}
/**
* Remember the result set and close it as soon as the transaction is
* committed (if it needs to be closed). This is done to delete temporary
...
...
@@ -1549,5 +1558,4 @@ public class Session extends SessionWithState {
}
}
}
This diff is collapsed.
Click to expand it.
h2/src/main/org/h2/table/TableView.java
浏览文件 @
bbea3c39
...
...
@@ -32,7 +32,6 @@ import org.h2.util.New;
import
org.h2.util.SmallLRUCache
;
import
org.h2.util.StatementBuilder
;
import
org.h2.util.StringUtils
;
import
org.h2.util.SynchronizedVerifier
;
import
org.h2.value.Value
;
/**
...
...
@@ -51,8 +50,6 @@ public class TableView extends Table {
private
ViewIndex
index
;
private
boolean
recursive
;
private
DbException
createException
;
private
final
SmallLRUCache
<
CacheKey
,
ViewIndex
>
indexCache
=
SmallLRUCache
.
newInstance
(
Constants
.
VIEW_INDEX_CACHE_SIZE
);
private
long
lastModificationCheck
;
private
long
maxDataModificationId
;
private
User
owner
;
...
...
@@ -97,8 +94,6 @@ public class TableView extends Table {
this
.
columnNames
=
columnNames
;
this
.
recursive
=
recursive
;
index
=
new
ViewIndex
(
this
,
querySQL
,
params
,
recursive
);
SynchronizedVerifier
.
check
(
indexCache
);
indexCache
.
clear
();
initColumnsAndTables
(
session
);
}
...
...
@@ -136,8 +131,6 @@ public class TableView extends Table {
if
(
views
!=
null
)
{
views
=
New
.
arrayList
(
views
);
}
SynchronizedVerifier
.
check
(
indexCache
);
indexCache
.
clear
();
initColumnsAndTables
(
session
);
if
(
views
!=
null
)
{
for
(
TableView
v
:
views
)
{
...
...
@@ -234,30 +227,16 @@ public class TableView extends Table {
TableFilter
[]
filters
,
int
filter
,
SortOrder
sortOrder
)
{
PlanItem
item
=
new
PlanItem
();
item
.
cost
=
index
.
getCost
(
session
,
masks
,
filters
,
filter
,
sortOrder
);
final
CacheKey
cacheKey
=
new
CacheKey
(
masks
,
session
);
synchronized
(
this
)
{
SynchronizedVerifier
.
check
(
indexCache
);
ViewIndex
i2
=
indexCache
.
get
(
cacheKey
);
if
(
i2
!=
null
)
{
item
.
setIndex
(
i2
);
return
item
;
}
}
// We cannot hold the lock during the ViewIndex creation or we risk ABBA
// deadlocks if the view creation calls back into H2 via something like
// a FunctionTable.
ViewIndex
i2
=
new
ViewIndex
(
this
,
index
,
session
,
masks
,
filters
,
filter
,
sortOrder
);
synchronized
(
this
)
{
// have to check again in case another session has beat us to it
ViewIndex
i3
=
indexCache
.
get
(
cacheKey
);
if
(
i3
!=
null
)
{
item
.
setIndex
(
i3
);
return
item
;
}
indexCache
.
put
(
cacheKey
,
i2
);
item
.
setIndex
(
i2
);
final
CacheKey
cacheKey
=
new
CacheKey
(
masks
,
this
);
SmallLRUCache
<
Object
,
ViewIndex
>
indexCache
=
session
.
getViewIndexCache
();
ViewIndex
i
=
indexCache
.
get
(
cacheKey
);
if
(
i
!=
null
)
{
item
.
setIndex
(
i
);
return
item
;
}
i
=
new
ViewIndex
(
this
,
index
,
session
,
masks
,
filters
,
filter
,
sortOrder
);
indexCache
.
put
(
cacheKey
,
i
);
item
.
setIndex
(
i
);
return
item
;
}
...
...
@@ -596,11 +575,11 @@ public class TableView extends Table {
private
static
final
class
CacheKey
{
private
final
int
[]
masks
;
private
final
Session
session
;
private
final
TableView
view
;
public
CacheKey
(
int
[]
masks
,
Session
session
)
{
public
CacheKey
(
int
[]
masks
,
TableView
view
)
{
this
.
masks
=
masks
;
this
.
session
=
session
;
this
.
view
=
view
;
}
@Override
...
...
@@ -608,7 +587,7 @@ public class TableView extends Table {
final
int
prime
=
31
;
int
result
=
1
;
result
=
prime
*
result
+
Arrays
.
hashCode
(
masks
);
result
=
prime
*
result
+
session
.
hashCode
();
result
=
prime
*
result
+
view
.
hashCode
();
return
result
;
}
...
...
@@ -624,7 +603,7 @@ public class TableView extends Table {
return
false
;
}
CacheKey
other
=
(
CacheKey
)
obj
;
if
(
session
!=
other
.
session
)
{
if
(
view
!=
other
.
view
)
{
return
false
;
}
if
(!
Arrays
.
equals
(
masks
,
other
.
masks
))
{
...
...
This diff is collapsed.
Click to expand it.
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