[SPARK-27326] Fall back all v2 file sources in `InsertIntoTable` to V1 FileFormat

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: SQL
• Assignee: Gengliang Wang
• Reporter: Gengliang Wang
• Created: 30/Mar/19 17:04
• Updated: 29/Apr/19 05:38
• Resolved: 30/Mar/19 21:39

Description

In the first PR for file source V2, there was a rule for falling back Orc V2 table to OrcFileFormat: https://github.com/apache/spark/pull/23383/files#diff-57e8244b6964e4f84345357a188421d5R34

As we are migrating more file sources to data source V2, we should make the rule more generic. This PR proposes to:
1. Rename the rule `FallbackOrcDataSourceV2 ` to `FallBackFileSourceV2`.The name is more generic. And we use "fall back" as verb, instead of "fallback".
2. Rename the method `fallBackFileFormat` in `FileDataSourceV2` to `fallbackFileFormat`. Here we should use "fallback" as noun, while "fall back" is verb.
3. Add new method `fallbackFileFormat` in `FileTable`. This is for falling back to V1 in rule `FallbackOrcDataSourceV2 `.

Issue Links

• links to: GitHub Pull Request #24251