[native] Delta table access via Symlink table using Hive Connector

[agrawalreetika]

Delta table access via Symlink table using Hive Connector in Prestissimo

Expected Behavior or Use Case

Delta table can be accessed using hive connector by registering them as a symlink tables in HMS. https://docs.delta.io/latest/presto-integration.html
This is to extend this same support for Prestissimo using Hive Connector.

Presto Component, Service, or Connector

presto-native-execution

Possible Implementation

Currenlty mapping for inputformat and serde are missing in Prestissimo to access symlink tables. We need to add that mapping in PrestoToVeloxConnector.cpp to successfully access Delta tables.

Context

Delta table can be accessed using hive connector by registering them as a symlink tables in HMS. https://docs.delta.io/latest/presto-integration.html
This is to extend this same support for Prestissimo using Hive Connector.

[agrawalreetika]

CC @majetideepak Fyi

[aditi-pandit]

@tdcmeehan, @ZacBlanco

@agrawalreetika : Do you have a prototype PR ?

[agrawalreetika]

@aditi-pandit We need just mapping of Symlink input format & serde in PrestoToVeloxConnector like agrawalreetika@8760651

Discussed about this with Deepak, he mentioned we should add test for this.
So I am open to get pointers around how do we write test for this? Since Presto hive connector Java doesn't support Creating symlink file.

[majetideepak]

@aditi-pandit This is similar to the Hudi change #19620.
Reetika and I are looking into how we can test Delta similar to Hudi and add a generic testing framework for both Hudi and Delta in Prestissimo.