[SPARK-33649] Improve the doc of spark.sql.ansi.enabled

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.1.0
• Component/s: Documentation, SQL
• Assignee: Gengliang Wang
• Reporter: Gengliang Wang
• Created: 03/Dec/20 15:28
• Updated: 04/Dec/20 02:59
• Resolved: 04/Dec/20 02:59

Description

As there are more and more new features under the SQL configuration spark.sql.ansi.enabled, we should make it more clear about:
1. what exactly it is
2. where user can find all the features of the ANSI mode
3. whether all the feature exactly from the SQL standard

Issue Links

• links to: [Github] Pull Request #30593 (gengliangwang)
• links to: [Github] Pull Request #30593 (gengliangwang)