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Stop the compression policy from reaching the collection health plan test's seed (#6944) #6948

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Merged
erikdarlingdata merged 1 commit into from
Oct 30, 2026
Merged

Stop the compression policy from reaching the collection health plan test's seed (#6944) #6948

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15 changes: 15 additions & 0 deletions Darling/Darling.Tests/FleetCollectionHealthRecoveryLiveTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -120,6 +120,15 @@ public async Task TheFollowUpStatement_ReadsThreeRunsPerPair_ThroughAnIndex_Agai
using var connection = new NpgsqlConnection(scratch.ConnectionString);
await connection.OpenAsync(ct);
await PgMigrations.MigrateAsync(connection, ct);
if (scratch.TimescaleEnabled)
{
/* V23 made collection_log a hypertable with a compression policy (compress_after 1 day), and every
seeded chunk is older than that. TimescaleDB's scheduler runs the policy on its own clock, so a run
landing between the seed and the plan compressed a chunk, and a compressed chunk is read through its
own "compressed_server_id__ts_meta_v2_first_col_idx" instead of idx_collection_log_watermark (dev run
40987085936, #6944). The plan is not the thing under test there, so no policy job runs here. */
await DarlingMcpTestData.ExecAsync(connection, ct, "SELECT _timescaledb_functions.stop_background_workers()");
}
await DeleteRowsAsync(connection, ct);

var bodySucceeded = false;
Expand All @@ -144,6 +153,12 @@ INSERT INTO collection_log
CASE WHEN g % 7 = 0 THEN 'ERROR' ELSE 'SUCCESS' END, NULL, 5, 80, 20
FROM generate_series(1, 6) c, generate_series(1, 2000) g", ServerId, ServerName, newest);
await DarlingMcpTestData.ExecAsync(connection, ct, "ANALYZE collection_log");
if (scratch.TimescaleEnabled)
{
await using var compressed = new NpgsqlCommand(
"SELECT count(*) FROM timescaledb_information.chunks WHERE hypertable_name = 'collection_log' AND is_compressed", connection);
Assert.Equal(0L, (long)(await compressed.ExecuteScalarAsync(ct))!);
}

var windowStart = DarlingMcpTestData.Naive(DateTime.UtcNow.AddDays(-7));
await using var postgres = NpgsqlDataSource.Create(scratch.ConnectionString);
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