[HIVE-5636] Introduce getPartitionColumns() functionality from HCatInputFormat

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.12.0
• Fix Version/s: 0.13.0
• Component/s: HCatalog

Release Note

Introduces 2 static functions on HCatInputFormat:

public static HCatSchema getPartitionColumns(Configuration conf) throws IOException
public static HCatSchema getDataColumns(Configuration conf) throws IOException

These return the partitioning columns and data column schemas for a HCatInputFormat user, and can be used after HCatInputFormat.setInput has been called on a job with an associated conf.

• Assignee: Sushanth Sowmyan
• Reporter: Sushanth Sowmyan
• Created: 24/Oct/13 00:41
• Updated: 23/Mar/14 18:13
• Resolved: 19/Feb/14 23:05

Description

As of HCat 0.5, we made the class InputJobInfo private for hcatalog use only, and we made it so that setInput would not modify the InputJobInfo being passed in.

However, if a user of HCatInputFormat wants to get what Partitioning columns or Data columns exist for the job, they are not able to do so directly from HCatInputFormat and are forced to use InputJobInfo, which currently does not work. Thus, we need to expose this functionality.