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体验新版 GitCode,发现更多精彩内容 >>
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4047be49
编写于
10月 09, 2017
作者:
X
Xpray
提交者:
Fabian Hueske
10月 10, 2017
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电子邮件补丁
差异文件
[FLINK-7776] [table] Prevent emission of identical update records in group aggregation.
This closes #4785.
上级
1ea7f49a
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
31 addition
and
4 deletion
+31
-4
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/GroupAggProcessFunction.scala
...ink/table/runtime/aggregate/GroupAggProcessFunction.scala
+6
-4
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/stream/table/AggregateITCase.scala
...he/flink/table/runtime/stream/table/AggregateITCase.scala
+25
-0
未找到文件。
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/GroupAggProcessFunction.scala
浏览文件 @
4047be49
...
...
@@ -129,17 +129,19 @@ class GroupAggProcessFunction(
state
.
update
(
accumulators
)
cntState
.
update
(
inputCnt
)
// if this was not the first row
and we have to emit retractions
if
(
generateRetraction
&&
!
firstRow
)
{
// if this was not the first row
if
(!
firstRow
)
{
if
(
prevRow
.
row
.
equals
(
newRow
.
row
)
&&
!
stateCleaningEnabled
)
{
// newRow is the same as before and state cleaning is not enabled.
// We
do not emit retraction and acc message.
// We
emit nothing
// If state cleaning is enabled, we have to emit messages to prevent too early
// state eviction of downstream operators.
return
}
else
{
// retract previous result
out
.
collect
(
prevRow
)
if
(
generateRetraction
)
{
out
.
collect
(
prevRow
)
}
}
}
// emit the new result
...
...
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/stream/table/AggregateITCase.scala
浏览文件 @
4047be49
...
...
@@ -193,4 +193,29 @@ class AggregateITCase extends StreamingWithStateTestBase {
// verify agg close is called
assert
(
JavaUserDefinedAggFunctions
.
isCloseCalled
)
}
@Test
def
testRemoveDuplicateRecordsWithUpsertSink
()
:
Unit
=
{
val
env
=
StreamExecutionEnvironment
.
getExecutionEnvironment
env
.
setStateBackend
(
getStateBackend
)
val
tEnv
=
TableEnvironment
.
getTableEnvironment
(
env
)
StreamITCase
.
clear
val
data
=
new
mutable
.
MutableList
[(
Int
,
Long
,
String
)]
data
.+=((
1
,
1L
,
"A"
))
data
.+=((
2
,
2L
,
"B"
))
data
.+=((
3
,
2L
,
"B"
))
data
.+=((
4
,
3L
,
"C"
))
data
.+=((
5
,
3L
,
"C"
))
val
t
=
env
.
fromCollection
(
data
).
toTable
(
tEnv
,
'a
,
'b
,
'c
)
.
groupBy
(
'c
)
.
select
(
'c
,
'b
.
max
)
t
.
writeToSink
(
new
TestUpsertSink
(
Array
(
"c"
),
false
))
env
.
execute
()
val
expected
=
List
(
"(true,A,1)"
,
"(true,B,2)"
,
"(true,C,3)"
)
assertEquals
(
expected
.
sorted
,
RowCollector
.
getAndClearValues
.
map
(
_
.
toString
).
sorted
)
}
}
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