[IGNITE-19770] Add a mechanism to wait till a schema is available via Schema Sync at a ts

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0
• Labels: iep-98 ignite-3
• Epic Link: Schema synchronization
• Assignee: Roman Puchkovskiy
• Reporter: Roman Puchkovskiy
• Reviewer: Aleksandr Polovtsev
• Created: 19/Jun/23 07:12
• Updated: 04/Sep/24 16:10
• Resolved: 07/Aug/23 03:56

Description

According to IEP-98, when obtaining a schema at a timestamp T, we need to wait till Meta-Storage SafeTime becomes >= T-DD. A mechanism for such waits needs to be implemented.

It can be implemented either as methods like CompletableFuture<TableDefinition> table(String tableName, HybridTimestamp ts) (for each getting method) or a single method like CompletableFuture<Void> waitForTs(HybridTimestamp) (then usual sync methods to be used to get the definitions).

Issue Links

• blocks: IGNITE-20042 Check table existence before executing each operation in an RW transaction
• blocks: IGNITE-20044 Validate schema eligibility on each read/write operation in an RW transaction
• causes: IGNITE-18536 Schema synchronization feature and Catalog feature integration
• links to: GitHub Pull Request #2402