谷歌云数据准备-从BigQuery导入数据集时出错
[英]google cloud data Prep - error when importing dataset from BigQuery
问题描述
When I tring to import bigquery tables as dataset in my data Prep flow, I have the following error: 
尝试将bigquery表作为数据准备流中的数据集导入时，出现以下错误：
Could not create dataset: I/o error. 无法创建数据集：I / O错误。
I tried to import many bigquery tables (which are from same BQ dataset) all of them successfully imported except this which has many columns (more than 2700 columns!). 我尝试导入许多bigquery表（来自相同的BQ数据集），所有这些表均已成功导入，除了它有许多列（超过2700列！）。 Maybe that's because of the large number of columns but I can't see any such limitation in Docs! 也许是因为列数很大，但是我在文档中看不到任何此类限制！
when I selecet the table ----> I have this message "Preview not available" like this: 当我选择表格---->时，我收到以下消息：“预览不可用”，如下所示：
and after clicking "import": 然后点击“导入”：
Does anyone have any idea why this is happening or has any suggestion? 有谁知道为什么会这样或有任何建议吗？
1 个解决方案
解决方案1
0 2018-09-11 02:05:16
Dataprep documentation doesn't have maximum columns limitation, thus it's not probable that this is the problem. Dataprep文档没有最大列限制，因此，这不太可能是问题所在。
On the other hand, I have seen generic messages like 'I/O error' or simply red icons when importing data, and they are related to the data type conversion between Dataprep and BigQuery . 另一方面，在导入数据时，我看到了通用消息，例如“ I / O错误”或只是红色图标，它们与Dataprep和BigQuery之间的数据类型转换有关。
I think that finding the types in BQ that are not compatibles in Dataprep and converting to one compatible should solve your issue. 我认为在BQ中查找与Dataprep不兼容的类型并将其转换为一种兼容应该可以解决您的问题。
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