[CASSANDRA-18787] Replace obsolete Python functions

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 5.1
• Component/s: CQL/Interpreter
• Change Category: Code Clarity
• Complexity: Low Hanging Fruit
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/abe09cff346c6f9cb5bc6dbd8e873364c05e026a

Test and Documentation Plan

• ran tests on UTC with and without TZ set
• successfully ran pytests 
• ran pycodestyle

• Assignee: Brad Schoening
• Reporter: Brad Schoening

Authors

Brad Schoening

Reviewers

Brandon Williams, Ekaterina Dimitrova

• Created: 22/Aug/23 18:31
• Updated: 01/Sep/23 19:48
• Resolved: 01/Sep/23 19:48

Description

1. Python's stdlib datetime.timezone.utc can replace the custom UTC timezone in pylib/cqlshlib/util.py.
2. Removed unused attributes and functions:
   1. field_size _limit 
   2. trim_if_present()
   3. maybe_ensure_text()
3. Simplify cql_version handling into a settor

Functionality should remain the same while simplifying the code by eliminating ~60 lines.

Issue Links

• links to: https://github.com/apache/cassandra/pull/2653