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[BugFix] split_part fuction should not return null when delimiter is not matched

3

## Why I'm doing:  ## What I'm doing:  Fixes #46774 ## What type of PR is this: - [X] BugFix - [ ] Feature - [ ] Enhancement...

[Enhancement] Add compression support for PlanFragment AttachmentRequest

8

## Why I'm doing: #63697 ## What I'm doing: ``` CREATE DATABASE IF NOT EXISTS compression_test; USE compression_test; CREATE TABLE IF NOT EXISTS wide_table ( c1 VARCHAR(255), c2 VARCHAR(255), c3...