Unable to run CloudFormation template for 'crawl delta lake tables using AWS crawler' ?

Question

![Enter image description here](/media/postImages/original/IMoK70ekDRQMm31-L36OmcIQ)

Not able to create crawler using cloud formation template facing this error "Invalid Delta Target with empty delta tables". Though I have data in the tables available and also, I am able to create the crawler using aws console having same data path successfully and is viewed in athena.
```
AWSTemplateFormatVersion: "2010-09-09"
Description: Delta lake tables using aws glue crawler

Resources:
  Crawl:
    Type: AWS::Glue::Crawler
    Properties:
      Name: crawler_name
      DatabaseName: database_name
      Role: role_arn
      Targets:
        DeltaTargets:
          - DeltaTables: 
            - S3_path_for_delta_table_folder (having deltalogs as child inside)
          - WriteManifest: True  
```

Accepted Answer

Hello,

I tried deploying your template and faced the same error. Then after checking the syntax for the `DeltaTargets` Property, I noticed there's an extra '-' (hyphen)  in the template, which isn't needed. 
Below is the corrected template. 
```
Resources:
  Crawl:
    Type: AWS::Glue::Crawler
    Properties:
      Name: crawler_name
      DatabaseName: database_name
      Role: role_arn
      Targets:
        DeltaTargets:
          - DeltaTables: 
              - S3_path_for_delta_table_folder (having deltalogs as child inside)
            WriteManifest: True  
```
`DeltaTables` and `WriteManifest` both are part of one DeltaTarget[1]. Hence we need to add '-' only on `DeltaTables` and not on `WriteManifest`. I tried the above template and it worked. 
Hope this helps.

References:
[1]https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-glue-crawler-deltatarget.html

Unable to run CloudFormation template for 'crawl delta lake tables using AWS crawler' ?

Relevanter Inhalt