Unable to read Hive Acid tables in Athena using Athena Hive data connector

Question

Hi,
We are trying to use Athena as our consumption service. We have migrated most of the hive databases/tables from external Hive meta store to AWS Glue except those database that has Hive ACID tables because Glue don't support Hive ACID tables. 
To read Hive ACID tables from Athena, we have configured Athena connector for Hive based this article https://docs.aws.amazon.com/athena/latest/ug/connect-to-data-source-hive.html and used AthenaHiveMetastoreFunctionWithLayer jar.

When try to query Hive ACID table (based on ORC file format ) from Athena using newly created custom catalog for Hive, I get below error.

"HIVE_CURSOR_ERROR: Failed to read ORC file: s3://my-datalake-bkt-dev/test/acid/ug/base_0000002/bucket_00000"

It looks like Athena not able to read the hive ACID file format. Can some one please help me?

Accepted Answer

Hello,

The latest Athena engine [v2](https://docs.aws.amazon.com/athena/latest/ug/presto-functions.html#presto-functions-env2) uses Presto 0.217 which does not support Hive ACID tables. I tried to use this [article](https://aws.amazon.com/blogs/big-data/amazon-emr-supports-apache-hive-acid-transactions/) and [this](https://docs.aws.amazon.com/athena/latest/ug/connect-data-source-sar-hive.html) to test it out and got the below error

```
HIVE_INVALID_BUCKET_FILES: Hive table 'default.acid_tbl' is corrupt. Found sub-directory in bucket directory for partition: 
```

Presto appears to only supports reading ACID tables starting from [Presto 331](https://trino.io/blog/2020/06/01/hive-acid.html)

However as per this [doc](https://docs.aws.amazon.com/athena/latest/ug/acid-transactions.html) ,Athena do support ACID transactions via AWS Lakeformation Governed tables or Icerberg. If you are looking to move your Hive ACID tables to AWS, then I would suggest you to check on the AWS LakeFormation governed tables feature which uses the same Glue catalog.

Ref:
**AWS lakeformation governed tables blog series**

https://aws.amazon.com/blogs/big-data/part-1-effective-data-lakes-using-aws-lake-formation-part-1-getting-started-with-governed-tables/

Unable to read Hive Acid tables in Athena using Athena Hive data connector

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