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Merge feat/674-historyupdate-posture: future-skew bound, Primary-only HistoryUpdate, SqlServer v1 accepted with modified trail disabled, QuestDB TTL pin (#674)

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This commit is contained in:
Joseph Doherty
2026-10-11 11:21:30 -04:00
parent 69190b14f1 0658d244d0
commit e59ab69398
25 changed files with 802 additions and 55 deletions
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src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer/SqlServerHistorianRetention.cs
+22 -10
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@@ -11,7 +11,8 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer;
/// <c>DELETE TOP(n)</c> batches (under the lock-escalation threshold). Samples are purged per tag so each
/// delete is a seek on the clustered key <c>(TagId, SourceTimeUtc)</c>; events seek on <c>CX_Event_Time</c>.
/// A session <c>sp_getapplock</c> (timeout 0) serialises purgers that share one database; a loser skips.
/// To purge another table later, add it to <see cref="PurgeAsync"/>.
/// To purge another table later, add it to <see cref="PurgeAsync"/>. On a v1 schema (no Part 11 trail, Gitea #674)
/// the <c>SampleModified</c> purge is skipped and absent from the results.
/// </summary>
internal sealed class SqlServerHistorianRetention : IHistorianRetention
{
@@ -72,6 +73,8 @@ internal sealed class SqlServerHistorianRetention : IHistorianRetention
return [];
}
// #674: a v1 schema has no SampleModified table — skip its purge rather than fail the whole pass.
var trail = _bootstrap.SupportsModifiedTrail;
long samples = 0, modified = 0;
var tagIds = new List<int>();
await using (var cmd = _conn.CreateCommand(conn, $"SELECT TagId FROM {_conn.Q("Tag")}"))
@@ -85,21 +88,30 @@ internal sealed class SqlServerHistorianRetention : IHistorianRetention
cutoff, id, ct).ConfigureAwait(false);
// The Part 11 modification trail (#668) ages out on the SAME source-time cutoff as the samples it
// describes; a purge never writes to it (no trigger, no OUTPUT INTO).
modified += await DeleteLoopAsync(conn,
$"DELETE TOP (@n) FROM {_conn.Q("SampleModified")} WHERE TagId = @id AND SourceTimeUtc < @cutoff",
cutoff, id, ct).ConfigureAwait(false);
if (trail)
{
modified += await DeleteLoopAsync(conn,
$"DELETE TOP (@n) FROM {_conn.Q("SampleModified")} WHERE TagId = @id AND SourceTimeUtc < @cutoff",
cutoff, id, ct).ConfigureAwait(false);
}
}
var events = await DeleteLoopAsync(conn,
$"DELETE TOP (@n) FROM {_conn.Q("Event")} WHERE EventTimeUtc < @cutoff",
cutoff, null, ct).ConfigureAwait(false);
return
[
new RetentionPurgeResult("Sample", samples),
new RetentionPurgeResult("SampleModified", modified),
new RetentionPurgeResult("Event", events),
];
return trail
?
[
new RetentionPurgeResult("Sample", samples),
new RetentionPurgeResult("SampleModified", modified),
new RetentionPurgeResult("Event", events),
]
:
[
new RetentionPurgeResult("Sample", samples),
new RetentionPurgeResult("Event", events),
];
}
finally
{