Question

我在ADF管道中运行USQL活动时遇到以下错误：

活动错误：

{"errorId":"E_CSC_USER_SYNTAXERROR","severity":"Error","component":"CSC",
    "source":"USER","message":"syntax error.
     Final statement did not end with a semicolon","details":"at token 'txt', line 3\r\nnear the ###:\r\n**************\r\nDECLARE @in string = \"/demo/SearchLog.txt\";\nDECLARE @out string = \"/scripts/Result.txt\";\nSearchLogProcessing.txt ### \n",
    "description":"Invalid syntax found in the script.",
    "resolution":"Correct the script syntax, using expected token(s) as a guide.","helpLink":"","filePath":"","lineNumber":3,
    "startOffset":109,"endOffset":112}].

这是输出数据集，管道和USQL脚本的代码，我试图在管道中执行。

OutputDataset：

{
"name": "OutputDataLakeTable",
"properties": {
    "published": false,
    "type": "AzureDataLakeStore",
    "linkedServiceName": "LinkedServiceDestination",
    "typeProperties": {
        "folderPath": "scripts/"
    },
    "availability": {
        "frequency": "Hour",
        "interval": 1
    }
}

管道：

{
    "name": "ComputeEventsByRegionPipeline",
    "properties": {
        "description": "This is a pipeline to compute events for en-gb locale and date less than 2012/02/19.",
        "activities": [
            {
                "type": "DataLakeAnalyticsU-SQL",
                "typeProperties": {
                    "script": "SearchLogProcessing.txt",
                    "scriptPath": "scripts\\",
                    "degreeOfParallelism": 3,
                    "priority": 100,
                    "parameters": {
                        "in": "/demo/SearchLog.txt",
                        "out": "/scripts/Result.txt"
                    }
                },
                "inputs": [
                    {
                        "name": "InputDataLakeTable"
                    }
                ],
                "outputs": [
                    {
                        "name": "OutputDataLakeTable"
                    }
                ],
                "policy": {
                    "timeout": "06:00:00",
                    "concurrency": 1,
                    "executionPriorityOrder": "NewestFirst",
                    "retry": 1
                },
                "scheduler": {
                    "frequency": "Minute",
                    "interval": 15
                },
                "name": "CopybyU-SQL",
                "linkedServiceName": "AzureDataLakeAnalyticsLinkedService"
            }
        ],
        "start": "2017-01-03T12:01:05.53Z",
        "end": "2017-01-03T13:01:05.53Z",
        "isPaused": false,
        "hubName": "denojaidbfactory_hub",
        "pipelineMode": "Scheduled"
    }
}

这是我的USQL脚本，我试图使用＆＃34; DataLakeAnalyticsU-SQL＆＃34;活动类型。

@searchlog =
    EXTRACT UserId          int,
            Start           DateTime,
            Region          string,
            Query           string,
            Duration        int?,
            Urls            string,
            ClickedUrls     string
    FROM @in
    USING Extractors.Text(delimiter:'|');

@rs1 =
    SELECT Start, Region, Duration
    FROM @searchlog
WHERE Region == "kota";


OUTPUT @rs1   
    TO @out
      USING Outputters.Text(delimiter:'|');

请建议我如何解决此问题。

Answer 1

您的脚本缺少scriptLinkedService属性。您（当前）还需要将U-SQL脚本放置在Azure Blob存储中以成功运行它。因此，您还需要AzureStorage链接服务，例如：

{
    "name": "StorageLinkedService",
    "properties": {
        "description": "",
        "type": "AzureStorage",
        "typeProperties": {
            "connectionString": "DefaultEndpointsProtocol=https;AccountName=myAzureBlobStorageAccount;AccountKey=**********"
        }
    }
}

创建此链接服务，将Blob存储名称myAzureBlobStorageAccount替换为相关的Blob存储帐户，然后将U-SQL脚本（SearchLogProcessing.txt）放在容器中，然后重试。在下面的示例管道中，我的Blob存储区中有一个名为adlascripts的容器，脚本在那里：

确保scriptPath已完成，正如亚历山大提到的那样。管道的开始：

{
    "name": "ComputeEventsByRegionPipeline",
    "properties": {
        "description": "This is a pipeline to compute events for en-gb locale and date less than 2012/02/19.",
        "activities": [
            {
                "type": "DataLakeAnalyticsU-SQL",
                "typeProperties": {
                    "scriptPath": "adlascripts\\SearchLogProcessing.txt",
                    "scriptLinkedService": "StorageLinkedService",
                    "degreeOfParallelism": 3,
                    "priority": 100,
                    "parameters": {
                        "in": "/input/SearchLog.tsv",
                        "out": "/output/Result.tsv"
                    }
                },
...

input和output .tsv文件可以位于数据湖中，并使用AzureDataLakeStoreLinkedService链接服务。

我可以看到您正在尝试关注以下演示：https://docs.microsoft.com/en-us/azure/data-factory/data-factory-usql-activity#script-definition。这不是最直观的演示，似乎存在一些问题，例如StorageLinkedService的定义在哪里？，哪里是SearchLogProcessing.txt？好的我通过谷歌搜索找到它，但网页上应该有一个链接。我得到了它的工作，但感觉有点像混血王子中的哈利波特。

Answer 2

删除U-SQL活动定义中的script属性，并在scriptPath属性中提供脚本的完整路径（包括文件名）。

参考：https://docs.microsoft.com/en-us/azure/data-factory/data-factory-usql-activity

Answer 3

我遇到了类似的问题，Azure Data Factory无法识别我的脚本文件。避免整个问题的一种方法是注册存储过程，而不必粘贴大量代码。你可以这样做：

DROP PROCEDURE IF EXISTS master.dbo.sp_test;
CREATE PROCEDURE master.dbo.sp_test() 
AS  
BEGIN 

@searchlog =
EXTRACT UserId          int,
        Start           DateTime,
        Region          string,
        Query           string,
        Duration        int?,
        Urls            string,
        ClickedUrls     string
FROM @in
USING Extractors.Text(delimiter:'|');

@rs1 =
    SELECT Start, Region, Duration
    FROM @searchlog
WHERE Region == "kota";


OUTPUT @rs1   
    TO @out
      USING Outputters.Text(delimiter:'|');
END;

运行此功能后，您可以使用

"script": "master.dbo.sp_test()"

在您的JSON管道定义中。每当更新U-SQL脚本时，只需重新运行该过程的定义即可。然后就不需要将脚本文件复制到Blob存储。

在Azure数据工厂中的管道中运行U-SQL活动时出错

3 个答案: