我已经构建了一个带有“复制数据”活动的管道,该活动可以从Azure Data Lake
复制数据并将其输出到Azure Blob Storage
。
在输出中,我可以看到我的某些行没有数据,我想将它们从副本中排除。在以下示例中,第二行没有有用的数据:
{"TenantId":"qa","Timestamp":"2019-03-06T10:53:51.634Z","PrincipalId":2,"ControlId":"729c3b6e-0442-4884-936c-c36c9b466e9d","ZoneInternalId":0,"IsAuthorized":true,"PrincipalName":"John","StreetName":"Rue 1","ExemptionId":8}
{"TenantId":"qa","Timestamp":"2019-03-06T10:59:09.74Z","PrincipalId":null,"ControlId":null,"ZoneInternalId":null,"IsAuthorized":null,"PrincipalName":null,"StreetName":null,"ExemptionId":null}
问题
在“复制数据”活动中,如何设置规则以排除丢失某些值的行?
这是我的管道代码:
{
"name": "pipeline1",
"properties": {
"activities": [
{
"name": "Copy from Data Lake to Blob",
"type": "Copy",
"policy": {
"timeout": "7.00:00:00",
"retry": 0,
"retryIntervalInSeconds": 30,
"secureOutput": false,
"secureInput": false
},
"userProperties": [
{
"name": "Source",
"value": "tenantdata/events/"
},
{
"name": "Destination",
"value": "controls/"
}
],
"typeProperties": {
"source": {
"type": "AzureDataLakeStoreSource",
"recursive": true
},
"sink": {
"type": "BlobSink",
"copyBehavior": "MergeFiles"
},
"enableStaging": false,
"translator": {
"type": "TabularTranslator",
"columnMappings": {
"Body.TenantId": "TenantId",
"Timestamp": "Timestamp",
"Body.PrincipalId": "PrincipalId",
"Body.ControlId": "ControlId",
"Body.ZoneId": "ZoneInternalId",
"Body.IsAuthorized": "IsAuthorized",
"Body.PrincipalName": "PrincipalName",
"Body.StreetName": "StreetName",
"Body.Exemption.Kind": "ExemptionId"
}
}
},
"inputs": [
{
"referenceName": "qadl",
"type": "DatasetReference"
}
],
"outputs": [
{
"referenceName": "datalakestaging",
"type": "DatasetReference"
}
]
}
]
}
}
答案 0 :(得分:1)
这是一个非常好的问题(该问题为+1),几个月前我也遇到了同样的问题,令我惊讶的是,我在“复制活动”中找不到任何东西可以解决此问题(我什至尝试了容错功能,但没有运气)。
考虑到我在U-SQL的管道中正在进行其他转换,我最终使用它来完成此操作。因此,我没有使用U-SQL Activity运算符在ADF中使用IS NOT NULL进行复制活动,它取决于您的数据,但是您可以使用它,也许您的字符串包含“ NULL”或空字符串“ “,这就是它的外观:
DECLARE @file_set_path string = "adl://myadl.azuredatalake.net/Samples/Data/{date_utc:yyyy}{date_utc:MM}{date_utc:dd}T{date_utc:HH}{date_utc:mm}{date_utc:ss}Z.txt";
@data =
EXTRACT
[id] string,
date_utc DateTime
FROM @file_set_path
USING Extractors.Text(delimiter: '\u0001', skipFirstNRows : 1, quoting:false);
@result =
SELECT
[id] ,
date_utc.ToString("yyyy-MM-ddTHH:mm:ss") AS SourceExtractDateUTC
FROM @data
WHERE id IS NOT NULL -- you can also use WHERE id <> "" or <> "NULL";
OUTPUT @result TO "wasb://samples@mywasb/Samples/Data/searchlog.tsv" USING Outputters.Text(delimiter: '\u0001', outputHeader:true);
注意:INPUT/OUTPUT files支持ADLS和Blob存储
请告诉我是否有帮助,或者上面的示例对您的数据不起作用。 希望有人会使用“复制活动”发布答案,这太棒了,但这是迄今为止的一种可能性。