[IGNITE-14864] Schema update. Merge multiple converters stages.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha3
• Component/s: sql
• Labels: iep-54 ignite-3
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Andrey Mashenkov
• Reporter: Andrey Mashenkov
• Created: 09/Jun/21 15:10
• Updated: 16/Jul/21 11:16
• Resolved: 16/Jul/21 11:16

Description

Assumed schema was updated a number of times and there are n >1 converters to apply.

Let's chain converters to apply all at once rather then one-by-one having a row of intermediate version in between.

Also, opposite changes like "adding column A" then "remove column A" or
"Changing column default" then "remove column A" can be effectively omitted.

Issue Links

• is a child of: IGNITE-13616 IEP-54 Live schema for tables
• is a child of: IGNITE-13752 Schema evolution converters.
• links to: GitHub Pull Request #194