[HCATALOG-484] HCatalog should use ql.metadata Table and Partition classes

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5
• Assignee: Travis Crawford
• Reporter: Travis Crawford
• Created: 29/Aug/12 23:27
• Updated: 15/Feb/13 21:32
• Resolved: 30/Aug/12 18:55

Description

Hive has two sets of classes for representing tables and partitions. For example:

• import org.apache.hadoop.hive.ql.metadata.Table
• import org.apache.hadoop.hive.metastore.api.Table

The metadata.api versions represent exactly what's stored in the metastore, while the ql.metadata versions add some business logic, such as providing serde-reported columns.

HCatalog should always use the ql.metadata versions of Table and Partition classes except when communicating with the metastore, or serializing these objects into the job conf.

Issue Links

• blocks: HCATALOG-491 Add thrift read support to HCatalog
• is related to: HIVE-3325 serde-reported partition cols should not be persisted in metastore
• relates to: HIVE-3278 Create wrappers around Thrift Metastore objects for improved readability