fixed benchmark

db/helpers_sql_builder_test.go

@@ -0,0 +1,24 @@
+package db
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestBuildDailySummaryInsertDoesNotGroupFinalAggJoin(t *testing.T) {
+	query, err := BuildDailySummaryInsert("inventory_daily_summary_20260101", "SELECT 1")
+	if err != nil {
+		t.Fatalf("BuildDailySummaryInsert failed: %v", err)
+	}
+
+	if !strings.Contains(query, `FROM agg
+JOIN totals ON totals."Vcenter" = agg."Vcenter";`) {
+		t.Fatalf("expected final agg/totals join with terminator, query tail changed unexpectedly")
+	}
+
+	if strings.Contains(query, `FROM agg
+JOIN totals ON totals."Vcenter" = agg."Vcenter"
+GROUP BY`) {
+		t.Fatalf("unexpected final GROUP BY after agg/totals join; this breaks Postgres SQLSTATE 42803")
+	}
+}