fleettickets/n8n-s3-ticket-exports.md

n8n S3 Ticket Exports — Incremental (CDC) Stream

Updated on June 23, 2026.

History. This doc previously described a full-snapshot-per-hour model ("No delta files … No changes/ directories"). That is no longer accurate. As of the June 22, 2026 re-seed the source switched to an incremental change-data-capture (CDC) stream under automations/<dataset>/changes/. The structure below was verified by direct S3 inspection of the tickets bucket on June 23, 2026. Workflow-internal details (IDs, node behaviour) are carried over from the prior version and may be stale — trust the bucket.

Overview

The FTTH ticket export now writes an incremental CSV stream per dataset:

• The first file in a stream is a full current-state baseline.
• Every later file holds only the rows that changed since the prior export — new and updated tickets, keyed by ticket_id.
• Deletions are never emitted (tickets are closed in place, not removed).

Consumers must ingest every not-yet-processed file in ascending timestamp order (baseline first, then each delta) and upsert on ticket_id. Taking only the newest file silently drops the intermediate deltas.

CSV files only. Filenames use the execution time in the Africa/Nairobi timezone (format below). All files share one identical flat-CSV schema (header

• rows) — the same column set the previous full snapshots used.

Output Layout

The change stream lives under a changes/ prefix per dataset in the tickets bucket:

automations/crq/changes/YYYY-MM-DDTHH-mm-ss.csv
automations/inc/changes/YYYY-MM-DDTHH-mm-ss.csv

Observed tickets bucket layout (June 23, 2026):

automations/inc/
├── changes/                 ← ACTIVE incremental stream (baseline + deltas)
│   ├── 2026-06-22T15-50-39.csv   (baseline,  ~15 MB, 34,849 rows)
│   ├── 2026-06-22T15-53-04.csv   (delta,        1 row)
│   ├── 2026-06-22T17-10-41.csv   (delta,       22 rows)
│   └── 2026-06-22T17-15-41.csv   (delta,      131 rows)
├── processed/               ← our pipeline's archive of consumed files
├── full/                    ← present but EMPTY (legacy prefix)
├── latest.csv/              ← present but EMPTY (legacy prefix)
└── latest.json/             ← present but EMPTY (legacy prefix)

Notes:

• There are no longer any automations/inc/<ts>.csv files at the root of inc/ — the last full snapshots (through 2026-06-18T17-00-05.csv) were archived to processed/. New data arrives only under changes/.
• The full/, latest.csv/, and latest.json/ prefixes still appear in listings but contain no objects (leftover/legacy; ignore them). There is no latest pointer and no JSON/metadata envelope.
• CRQ mirrors INC: automations/crq/changes/ carries the same incremental stream (with matching baseline timestamps and additional newer deltas). CRQ remains out of scope for import_tickets.py (INC-only), but the source-side shape is the same. CRQ's old root snapshots (automations/crq/<ts>.csv) are still present because nothing archives them — they are not consumed.

CSV Schema

Header (32 columns), identical across baseline and delta files:

ticket_id, source_type, service_type, bucket, raw_status, normalized_status,
created_at_service, scheduled_at, closed_at, last_seen_at, first_seen_at,
week_start, week_end, cluster, region, location_name, latitude, longitude,
department, assigned_team, owner, sla_status, mttr, is_auto_created,
is_auto_closed, is_alarm, is_actionable, source_s3_bucket, source_s3_key,
source_snapshot_id, created_at, updated_at

Each row is a complete record (not a partial diff): a delta row carries the ticket's full current state, so a plain upsert on ticket_id is correct. The baseline still contains is_alarm=true rows and may include a leading EXPORT STOPPED… truncation-sentinel row in ticket_id; both are filtered by the consumer (see import_tickets.py).

Timestamp Format

YYYY-MM-DDTHH-mm-ss          e.g. 2026-06-22T15-50-39

Generated once at the start of each execution, formatted in Africa/Nairobi (EAT). Note this is the execution time, not a top-of-the-hour schedule — the incremental files appear whenever a change batch is exported (multiple within the same hour are normal, e.g. 15-50-39 then 15-53-04).

How import_tickets.py Consumes It

python import_tickets.py --from-bucket --apply (see run_ingest.sh):

1. Lists automations/inc/changes/<ts>.csv, sorts ascending by timestamp.
2. Skips files at/older than the watermark (tickets.import_meta.metadata->>'source_max_key' — the newest file already applied); on a fresh stream it processes everything present.
3. For each pending file, oldest→newest: drop is_alarm=true + sentinel rows, strip DROP_FIELDS, normalize region/raw_status, then upsert on ticket_id. The row upsert and the watermark advance commit in one transaction per file, after which the file is moved to automations/inc/processed/.
4. A mid-run failure therefore leaves folder state consistent with the watermark; the next run resumes cleanly from where it stopped.

The first file applied onto an empty watermark is recorded as export_type="baseline" in tickets.import_meta; every file after is "delta".

Workflow Context (carried over — verify before relying on)

The export originates from the FTTH Automation Ticket export workflow, calling the authenticated Scoreboard export endpoint and uploading CSV(s) to the tickets bucket; a sibling workflow exports fuel_records/<ts>.csv to the fuel bucket. Source DB queries are read-only and the workflows do not delete or update source rows. The previously documented workflow IDs and the claim of "two files per hour, full snapshots, no changes/" predate the June 22 switch to the incremental stream and should be re-confirmed against the live n8n configuration before being treated as current.