Régis Hanol 8f8d88afac
PERF: Optimize query for finding users with unread chat messages (#29964)
Using CTEs and DISTINCT ON to:
- Pre-filter active users with correct preferences
- Get only first unread message per channel
- Eliminate redundant joins and message scanning

This reduces the query execution time by limiting message scanning and joins to only relevant users and messages.

Internal ref t/142836 & t/139517
2024-11-28 15:28:37 +01:00
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