[SPARK-35971] Rename the type name of TimestampNTZType as "timestamp_ntz"

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: SQL
• Assignee: Gengliang Wang
• Reporter: Gengliang Wang
• Created: 01/Jul/21 09:00
• Updated: 22/Jul/21 07:11
• Resolved: 01/Jul/21 12:50

Description

Rename the type name string of TimestampNTZType from "timestamp without time zone" to "timestamp_ntz".
This is to make the column header shorter and simpler.
Snowflake and Flink uses similar approach:
https://docs.snowflake.com/en/sql-reference/data-types-datetime.html
https://ci.apache.org/projects/flink/flink-docs-master/docs/dev/table/concepts/timezone/

Issue Links

• links to: [Github] Pull Request #33173 (gengliangwang)
• links to: [Github] Pull Request #33173 (gengliangwang)