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h2database
Commits
279be7f8
提交
279be7f8
authored
1月 13, 2019
作者:
Evgenij Ryazanov
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电子邮件补丁
差异文件
Add RATIO_TO_REPORT window function
上级
54d25b13
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
61 行增加
和
1 行删除
+61
-1
help.csv
h2/src/docsrc/help/help.csv
+13
-0
WindowFunction.java
h2/src/main/org/h2/expression/analysis/WindowFunction.java
+40
-0
WindowFunctionType.java
...c/main/org/h2/expression/analysis/WindowFunctionType.java
+7
-0
TestScript.java
h2/src/test/org/h2/test/scripts/TestScript.java
+1
-1
没有找到文件。
h2/src/docsrc/help/help.csv
浏览文件 @
279be7f8
...
...
@@ -5547,6 +5547,19 @@ SELECT NTH_VALUE(X) IGNORE NULLS OVER (
), * FROM TEST;
"
"Functions (Window)","RATIO_TO_REPORT","
RATIO_TO_REPORT(value)
OVER windowNameOrSpecification
","
Returns the ratio of a value to the sum of all values.
Is argument is NULL or sum of all values is 0, then the value of function is NULL.
Window functions are currently experimental in H2 and should be used with caution.
They also may require a lot of memory for large queries.
","
SELECT X, RATIO_TO_REPORT(X) OVER (PARTITION BY CATEGORY), CATEGORY FROM TEST;
"
"System Tables","Information Schema","
INFORMATION_SCHEMA
","
...
...
h2/src/main/org/h2/expression/analysis/WindowFunction.java
浏览文件 @
279be7f8
...
...
@@ -48,6 +48,7 @@ public class WindowFunction extends DataAnalysisOperation {
case
LAG:
case
FIRST_VALUE:
case
LAST_VALUE:
case
RATIO_TO_REPORT:
return
1
;
case
NTH_VALUE:
return
2
;
...
...
@@ -68,6 +69,7 @@ public class WindowFunction extends DataAnalysisOperation {
case
NTILE:
case
FIRST_VALUE:
case
LAST_VALUE:
case
RATIO_TO_REPORT:
return
1
;
case
LEAD:
case
LAG:
...
...
@@ -207,6 +209,9 @@ public class WindowFunction extends DataAnalysisOperation {
case
NTH_VALUE:
getNth
(
session
,
result
,
ordered
,
rowIdColumn
);
break
;
case
RATIO_TO_REPORT:
getRatioToReport
(
session
,
result
,
ordered
,
rowIdColumn
);
break
;
default
:
throw
DbException
.
throwInternalError
(
"type="
+
type
);
}
...
...
@@ -375,6 +380,38 @@ public class WindowFunction extends DataAnalysisOperation {
}
}
private
static
void
getRatioToReport
(
Session
session
,
HashMap
<
Integer
,
Value
>
result
,
ArrayList
<
Value
[]>
ordered
,
int
rowIdColumn
)
{
int
size
=
ordered
.
size
();
Value
value
=
null
;
for
(
int
i
=
0
;
i
<
size
;
i
++)
{
Value
v
=
ordered
.
get
(
i
)[
0
];
if
(
v
!=
ValueNull
.
INSTANCE
)
{
if
(
value
==
null
)
{
value
=
v
.
convertTo
(
Value
.
DOUBLE
);
}
else
{
value
=
value
.
add
(
v
.
convertTo
(
Value
.
DOUBLE
));
}
}
}
if
(
value
!=
null
&&
value
.
getSignum
()
==
0
)
{
value
=
null
;
}
for
(
int
i
=
0
;
i
<
size
;
i
++)
{
Value
[]
row
=
ordered
.
get
(
i
);
Value
v
;
if
(
value
==
null
)
{
v
=
ValueNull
.
INSTANCE
;
}
else
{
v
=
row
[
0
];
if
(
v
!=
ValueNull
.
INSTANCE
)
{
v
=
v
.
convertTo
(
Value
.
DOUBLE
).
divide
(
value
);
}
}
result
.
put
(
row
[
rowIdColumn
].
getInt
(),
v
);
}
}
@Override
protected
Value
getAggregatedValue
(
Session
session
,
Object
aggregateData
)
{
throw
DbException
.
getUnsupportedException
(
"Window function"
);
...
...
@@ -444,6 +481,7 @@ public class WindowFunction extends DataAnalysisOperation {
return
Value
.
LONG
;
case
PERCENT_RANK:
case
CUME_DIST:
case
RATIO_TO_REPORT:
return
Value
.
DOUBLE
;
case
LEAD:
case
LAG:
...
...
@@ -480,6 +518,7 @@ public class WindowFunction extends DataAnalysisOperation {
return
ValueLong
.
PRECISION
;
case
PERCENT_RANK:
case
CUME_DIST:
case
RATIO_TO_REPORT:
return
ValueDouble
.
PRECISION
;
case
LEAD:
case
LAG:
...
...
@@ -502,6 +541,7 @@ public class WindowFunction extends DataAnalysisOperation {
return
ValueLong
.
DISPLAY_SIZE
;
case
PERCENT_RANK:
case
CUME_DIST:
case
RATIO_TO_REPORT:
return
ValueDouble
.
DISPLAY_SIZE
;
case
LEAD:
case
LAG:
...
...
h2/src/main/org/h2/expression/analysis/WindowFunctionType.java
浏览文件 @
279be7f8
...
...
@@ -65,6 +65,11 @@ public enum WindowFunctionType {
*/
NTH_VALUE
,
/**
* The type for RATIO_TO_REPORT() window function.
*/
RATIO_TO_REPORT
,
;
/**
...
...
@@ -98,6 +103,8 @@ public enum WindowFunctionType {
return
LAST_VALUE
;
case
"NTH_VALUE"
:
return
NTH_VALUE
;
case
"RATIO_TO_REPORT"
:
return
RATIO_TO_REPORT
;
default
:
return
null
;
}
...
...
h2/src/test/org/h2/test/scripts/TestScript.java
浏览文件 @
279be7f8
...
...
@@ -204,7 +204,7 @@ public class TestScript extends TestDb {
"parsedatetime"
,
"quarter"
,
"second"
,
"truncate"
,
"week"
,
"year"
,
"date_trunc"
})
{
testScript
(
"functions/timeanddate/"
+
s
+
".sql"
);
}
for
(
String
s
:
new
String
[]
{
"lead"
,
"nth_value"
,
"ntile"
,
"row_number"
})
{
for
(
String
s
:
new
String
[]
{
"lead"
,
"nth_value"
,
"ntile"
,
"r
atio_to_report"
,
"r
ow_number"
})
{
testScript
(
"functions/window/"
+
s
+
".sql"
);
}
...
...
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