perf(sitecallaudit): filtered IX_SiteCalls_Terminal index backs the retention purge predicate (plan R2-04 T10)

2026-07-13 10:23:19 -04:00
parent 439dee52d3
commit 3d6973cc89
6 changed files with 2168 additions and 0 deletions
@@ -97,5 +97,14 @@ public class SiteCallEntityTypeConfiguration : IEntityTypeConfiguration<SiteCall
            .HasDatabaseName("IX_SiteCalls_NonTerminal")
            .HasFilter("[TerminalAtUtc] IS NULL")
            .IncludeProperties(nameof(SiteCall.SourceSite), nameof(SiteCall.SourceNode), nameof(SiteCall.Status));
+
+        // Terminal backs the daily retention purge's predicate (TerminalAtUtc IS NOT NULL
+        // AND TerminalAtUtc < cutoff) and Task 11's MIN() slice anchor: filtered to the
+        // terminal population so the purge seeks the expired tail instead of full-scanning
+        // the 365-day table (arch-review 04 round 2, R6). Complements IX_SiteCalls_NonTerminal,
+        // which is filtered to IS NULL and unusable for this predicate.
+        builder.HasIndex(s => s.TerminalAtUtc)
+            .HasDatabaseName("IX_SiteCalls_Terminal")
+            .HasFilter("[TerminalAtUtc] IS NOT NULL");
    }
 }