[SPARK-22400] rename some APIs and classes to make their meaning clearer

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Zhenhua Wang
• Reporter: Zhenhua Wang
• Created: 30/Oct/17 16:15
• Updated: 31/Jan/18 07:38
• Resolved: 30/Oct/17 17:21

Description

Both `ReadSupport` and `ReadTask` have a method called `createReader`, but they create different things. This could cause some confusion for data source developers. The same issue exists between `WriteSupport` and `DataWriterFactory`, both of which have a method called `createWriter`.

Besides, the name of `RowToInternalRowDataWriterFactory` is not correct, because it actually converts `InternalRow`s to `Row`s.

Issue Links

• links to: [Github] Pull Request #19610 (wzhfy)