[英]How to Export Multiple files from BLOB to Data lake Parquet format in Azure Synapse Analytics using a parameter file?
I'm trying to export multiples.csv files from a blob storage to Azure Data Lake Storage in Parquet format based on a parameter file using ADF -for each to iterate each file in blob and copy activity to copy from src to sink (have tried using metadata and for each activity) as I'm new on Azure could someone help me please to implement a parameter file that will be used in copy activity.我正在尝试将 multiples.csv 文件从 blob 存储导出到 Azure 基于参数文件的 Parquet 格式的数据湖存储,使用 ADF -for each 迭代 blob 中的每个文件并复制活动以从 src 复制到接收器(已尝试使用元数据和每个活动),因为我是 Azure 的新手,有人可以帮我实现一个将在复制活动中使用的参数文件。 Thanks a lot
非常感谢
If so.如果是这样。 I created simple test:
我创建了简单的测试:
I have a paramfile contains the file names that will be copied later.我有一个 paramfile 包含稍后将复制的文件名。
In ADF, we can use Lookup
activity to the paramfile.在 ADF 中,我们可以对参数文件使用
Lookup
活动。 The dataset is as follows:
数据集如下:
The output of
Lookup
activity is as follows: Lookup
活动的output如下:
In ForEach
activity, we should add dynamic content @activity('Lookup1').output.value
.在
ForEach
活动中,我们应该添加动态内容@activity('Lookup1').output.value
。 It will foreach the ouput array of Lookup
activity.它将 foreach
Lookup
活动的输出数组。
Inside ForEach
activity, at source tab we need to select Wildcard file path
and add dynamic content @item().Prop_0
in the Wildcard paths.在
ForEach
活动中,在源选项卡中,我们需要 select Wildcard file path
并在通配符路径中添加动态内容@item().Prop_0
。
That's all.就这样。
I think you are asking for an idea of ow to loop through multiple files and merge all similar files into one data frame, so you can push it into SQL Server Synapse.我认为您是在询问如何循环遍历多个文件并将所有相似文件合并到一个数据帧中,因此您可以将其推送到 SQL Server Synapse 中。 Is that right?
那正确吗? You can loop through files in a Lake by putting wildcard characters in the path to files that are similar.
您可以通过将通配符放在相似文件的路径中来遍历 Lake 中的文件。
Copy Activity pick up only files that have the defined naming pattern—for example, "*2020-02-19.csv" or "???20210219.json".复制活动仅选取具有已定义命名模式的文件,例如“*2020-02-19.csv”或“???20210219.json”。
See the link below for more details.有关详细信息,请参阅下面的链接。
https://azure.microsoft.com/en-us/updates/data-factory-supports-wildcard-file-filter-for-copy-activity/ https://azure.microsoft.com/en-us/updates/data-factory-supports-wildcard-file-filter-for-copy-activity/
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