PacketStation/docs/SCHEMA.md

Packet Station schema

Status: phases 1 to 4 built (identity, organisation, projects, packets, change orders, documents, jobs, VISUAL and drawing caches, the warehouse columns in use, the notification_events placeholder). Phase 9 adds the notification rules and delivery. The DDL is in server/packetstation/migrations/; this file explains it. See PLAN.md, "Schema".

Conventions

Identity bigints, except users, keyed on the AD objectGUID. Postgres enums for workflow states. Every timestamp is timestamptz in UTC. Soft delete uses removed_at, removed_by and removed_reason. Append-only tables give the app role insert and select only, plus a trigger that refuses updates and deletes.

Database roles

A superuser for bootstrap, the migrate role ps_migrate (owns the database and the schema, runs migrations) and the app role ps_app. The worker shares ps_app and sets application_name to ps-worker, so the two are told apart in pg_stat_activity; a separate ps_worker role was not needed (decided in phase 3). ps_app holds CONNECT and TEMPORARY on the database (the feed COPYs each batch into temp tables) and no CREATE on the schema.

Identity (phase 1, migration 0002)

Enums: role_kind (admin, clerical, clerical_supervisor, warehouse, warehouse_supervisor, qc, qc_supervisor, pm, shop_worker, shop_lead, shop_supervisor), session_kind (password, pin), sig_factor (password, pin), dept_kind (support, shop).

• users: id uuid is the AD objectGUID, stable across renames. Caches sam_account (unique, case-insensitive), upn, display_name, emp_no (text; indexed but not unique, because a duplicate must be storable and flagged), email, welder_stamp, active, directory_flags jsonb (disabled, missing or duplicate employee ID), ad_synced_at, last_signin_at. A user whose AD account is disabled or gone keeps the row, marked inactive.
• user_roles: (user_id, role, dept_code) rebuilt at every sign-in, at the 15-minute role refresh and by the AD refresh. Office roles carry their department code, admin carries null, shop roles carry the two-digit code. Only the highest shop level per department is stored.
• sessions: token_hash (HMAC-SHA256 of the cookie token with the session key), kind, device_id for PIN sessions, expires_at (absolute), last_seen_at (idle), locked_since, revoked_at and revoked_reason, ip, user_agent, roles_snapshot jsonb ({"roles": [...], "groups": [...]}), roles_checked_at, stepup_failures, hidden_since (the last hidden-tab report, cleared by the next request).
• devices: registered shop devices. name, token_hash of the device cookie, registered_by, last_seen_at, revoked_at, revoked_by.
• user_pins: one row per user with a PIN. Argon2id hash, failed_count (across sign-in, unlock and signature), disabled_at, set_at. Never readable by Admin in clear; Admin may delete the row.
• signin_attempts: append-only. account (lower(login), emp:<emp_no> or user:<uuid>), ip, kind (password, pin, unlock, signature, pin_set), ok, reason, user_id, session_id. Both rate limits count the failed rows here.
• signatures: append-only. Who (user_id, account and display_name snapshots), the session_id and session_kind, the factor, action, meaning, packet_id, subject_type, subject_id and a content_hash (sha256 of the canonical JSON of what was signed). Later phases reference it from every sign-off row.

Append-only tables use the ps_append_only trigger from 0001 and revoke UPDATE, DELETE and TRUNCATE from ps_app.

Organisation (phase 1 seed, phase 2 completes)

• departments: code (text PK, CL, WH, QC, PM, 01 to 14), slug (the AD group short name, unique), name, kind, sort, active, supervisor_group (false only for PM). A trigger refuses changes to code and slug. Seeded with the 18 departments from the brief and the old depts.js. Migration 0003 adds weld (bool, default false), true for 03, 04, 05, 06, 07 and 10. A weld department gets the welding checklist, and submit there needs at least one weld and a filler.
• stations: (dept_code, name, sort, active), seeded with the old station lists (Stall 1 to 6, Station 1 to 4, Hydro Bay 1 and 2, Blast Booth, Paint Booth 1 and 2).
• user_station_limits: (user_id, station_id) primary key. A worker with rows here may only work on packets at those stations. No rows means any station in the department. The rows go when the user row goes.

The 50 AD group names are derived from departments plus PS-Admins: PS-<slug> and PS-<slug>-Supervisor for support departments, PS-<code>-<slug>-<Worker|Lead|Supervisor> for shop departments. packetstation ad-groups --list prints them.

Enums (phase 2, migration 0003)

Declaration order matters for packet_status: it is the workflow order, so status >= 'qc' works in SQL.

Enum	Values in order
packet_status	draft, warehouse, ready, assigned, in_progress, review, qc, complete, filed
wh_stage	incoming, pulling, hold, pulled
co_review	pending, approved, rejected
co_origin	visual, drawing, manual
source_kind	visual, hand
project_status	open, hold, closed
route_kind	databook, shipping
drawing_state	none, needed, attached, rev_mismatch, not_released, not_found, lookup_failed, hand
itp_status	open, signed, reopened

Smaller closed sets are text with a CHECK: projects.source and every *_src (visual, hand), project_aliases.kind (renumber, unit_renumber, import), packet_pages.type (drawing, info, overlay), bom_lines.src (visual, hand), qc_inspections.result (accepted, rejected), itp_lines.result (approve, reject, na). Null means unset in each.

Projects and units (phase 2)

• projects: number (text, unique among live rows on upper(number)), name, customer, po, due, status (project_status), notes, source (hand or visual), needs_details (the feed made it and Clerical has not filled it in), version for field CAS. Order-derived values carry provenance: customer_src, po_src, order_date_src and ship_date_src say visual or hand, and customer_visual and po_visual keep what VISUAL said. The feed never overwrites a hand value. Soft delete.
• units: project_id, lot (text), name, due, status, notes, the same *_src companions, order_date, ship_date, version. A CHECK keeps lot to 1 to 3 upper-case letters or digits, and a lot of digits only is exactly 3 long (001, 7A). Unique among live rows on (project_id, lot). Soft delete.
• project_aliases: alias (text PK, upper-cased by CHECK), project_id, unit_id (null for a project number), kind (renumber, unit_renumber, import), created_at. Every current and old number of every project and unit is here, so a lookup by any number resolves, and a renumber cannot reuse a number that was ever taken.
• project_renumbers: append-only. at, by, project_id, unit_id, old_number, new_number, reason.
• View v_units: every units column plus number (project.number || lot, so L999 and 001 make L999001), project_number, project_name, project_status and due_effective (the unit's due, else the project's).

Packets (phase 2)

Header

packets is the header. The columns that matter:

• Placement: unit_id, dept_code, op, title, customer, drawing, rev, wps.
• Workflow: status (packet_status), status_at, station_id, welder_id and welder_stamp (a snapshot taken at assign), for_sup_id, wh_skipped (true when Clerical sent the draft straight to a department or to Q.C.), wh_sent_at, routed_to (route_kind, set at Q.C. accept), return_note (the reason shown after a send-back), vclosed_at and vclosed_by, databook_at.
• Preconditions: heat_map is nullable on purpose. Null means not answered yet, and the warehouse step needs an answer.
• Source: source_kind (visual or hand), source jsonb, visual_key (the feed's match key), visual_rel, visual_want, drawing_state, flags text[], visual_fp_applied (the fingerprint the packet matches), visual_closed_at, visual jsonb (system-written sub-keys).
• Counters: next_weld_no, next_heat_no, next_page_no and next_co_no, all starting at 1. See "Versioning".
• version, created_at, created_by, updated_at, soft delete.

Indexes: packets_visual_key is unique on visual_key where the key is set and the row is live. A removed packet keeps its key, so two removed rows may share one, but only one live row may hold it. Also (status) for live rows, (unit_id) and (dept_code, status) for the boards.

The trigger ps_packet_touch sets updated_at on every UPDATE. It does not touch version.

Children

• packet_work_orders: wo_base, lot, split, sub (all text; the last three default to '' so the key has no nulls), seq, qty, target_hrs, op, description, visual_status, missing_runs and gone_at (the feed's "work order gone" check), sort, row_version. Phase 3 adds partspecs, rev and dwg. Unique on (packet_id, wo_base, lot, split, sub, seq) with nulls not distinct, since migration 0004 (see "VISUAL and drawing caches").
• packet_pages: n (the packet page number, from next_page_no), type, asset_id, pn (page within the asset), dwg, rev, co_id (the change order that added it), void_co_id, void_at, void_by, void_new_n (a replaced page is voided, never deleted), row_version. Unique on (packet_id, n).
• bom_lines: item, qty, part_id (text), description, dwg_ref, cl_item, length, material, heat, na, issued, loc, pulled, pulled_at, pulled_by, mtr_asset_id, src, vkey, whs, comm, cons, sub, grp, sort, row_version. Unique on (packet_id, item).
• bom_shorts: bom_line_id (cascades with the line), qty, qty_open, reason, ref, eta, note, opened_at, opened_by, closed_at, row_version. At most one open short per line (unique on bom_line_id where closed_at is null).
• short_receipts: append-only. short_id, packet_id, qty, heat, note, at, by.

What the warehouse columns mean in practice (phase 4):

• bom_lines.pulled: the line is off the shelf. The first tick sets pulled_at and pulled_by, and sets issued to qty when it was empty. Unticking clears all three of pulled, pulled_at and pulled_by. The first tick while the warehouse stage is incoming or on hold also starts pulling (a packet_wh row with auto true).
• bom_lines.issued: how many pieces went out. Less than qty means the rest should be on a short.
• bom_lines.loc: where the parts were taken from, as the warehouse types it.
• bom_lines.heat: the heat number of the pieces issued, checked against the heat pattern. A receipt adds its heat to the line, so a line with parts from two heats reads H1 / H2 (heats joined with " / ", no repeats).
• bom_lines.na: the part has no traceability. An N/A line needs no heat, takes no heat, and does not count toward the release gate.
• bom_lines.mtr_asset_id: the mill test report for the line, an assets row that must be a PDF, PNG or JPEG. Null clears it.
• A line "needs a heat" when it is not N/A, not a sub-assembly (sub is Y), is pulled, has issued above 0 and has no heat. The release gate counts these lines (see POLICY.md).
• bom_shorts: one open short per line at most. Opening a short sets the line's issued to qty minus the short quantity and ticks it pulled. qty is what was short in total, qty_open what is still missing. reason is one of the closed short reasons, ref the PO or requisition, eta the expected date. Editing an open short keeps what was already received in qty. "Not short after all" closes it (closed_at) and sets issued to the line's qty. While a short is open, the line's heat, issued and location change only through the short.
• short_receipts: one row per delivery, never changed. Each receipt lowers qty_open, adds its pieces to the line's issued and its heat to the line's heat. The receipt that brings qty_open to 0 closes the short.
• packet_wh: reason is one of the closed hold reasons when the stage is hold, and note is up to 200 characters.
• packet_stages: one row per visit to a shop department. dept_code, station_id, welder_id, welder_stamp, checklist jsonb (key to {done, at, by, stamp}, written per key with jsonb_set), filler, filler_lot, preheat, notes, the clock (clock_elapsed_ms, clock_running_since, clock_started_at), qc_snapshot, opened_at, closed_at, row_version. At most one open stage per packet.
• welds: weld_no (from next_weld_no), page, fx and fy (fractions of the page), wo_base, piece, items int[], type, size, process, stamp, welder_id, dept_code, stage_id, carried_from, at, by, row_version, soft delete. Unique on (packet_id, weld_no) among live rows.
• heat_tags: tag_no (from next_heat_no), page, item, fx, fy, carried_from, at, by, row_version, soft delete. Unique on (packet_id, tag_no) among live rows.
• heat_table_placements: page, x, y, s, by, at. Unique on (packet_id, page), written as an upsert.
• packet_wh: the warehouse stage history. stage (wh_stage), by, at, reason, note, auto, closed_at. The current row has closed_at null and is unique per packet. A stage change closes it and inserts the next.
• packet_transitions: append-only. Every status change: at, by, action, from_status, to_status, from_dept, to_dept, reason, signature_id, it_reason. Replaces the old hist and sentBack lists.
• qc_inspections: stage_id, sent_at, sent_by, book, spool, location, sent_note, checks jsonb, weld_exam jsonb (weld_no to {result, note}), nde_method, nde_result, nde_report, hardness, nace, inspector, stamp, notes, result, result_at, result_by, result_note, signature_id, row_version, closed_at. At most one open inspection per packet.
• qc_history: append-only. at, result, inspector, note, dept_code, snapshot jsonb.
• packet_seals: the HMAC-SHA256 hash written at filing, key_id, sealed_at, sealed_by, signature_id, and broken_at, broken_by, broken_reason when IT reopens. At most one unbroken seal per packet.
• packet_log: append-only. The user-visible history: at, by, by_name and role (snapshots), action, note, it_reason, signature_id, transition_id. Indexed on (packet_id, id).
• packet_visual_state: one row per packet, written by the worker. legs jsonb, ticket_hours, order_ref, observed_at.

Every who column references users (id). Every signature_id references signatures (id).

Change orders (phases 2 and 3)

• change_orders: co_no (from next_co_no; unique per packet), origin (co_origin), review (co_review), minor, hold, held_by, held_at, ecn, reason, issued_*, approved_* and rejected_* (each with a *_signature_id), vis, waiting and staged jsonb (feed-shaped), target_fp, row_version. At most one pending VISUAL change order per packet (unique on packet_id where origin is visual and review is pending), so the feed re-aims it instead of stacking new ones.
• co_items: the page changes. old_page, old_dwg, old_rev, new_page, new_dwg, new_rev, added.
• co_required_depts: (co_id, dept_code) primary key. The departments that must verify.
• co_verifications: append-only, keyed on (co_id, dept_code). by and signature_id are required, plus at, note, it_reason. A primary key violation means the department already verified. A verification cannot be withdrawn.
• View v_open_cos ports the old openCOs(): packet_id, co_id, co_no, review, hold, pending_depts (text[], the required departments without a verification, sorted by code). A row appears when review is approved and pending_depts is not empty, or when review is pending and hold is true. A pending change order without hold holds nothing. A rejected one never appears. The policy's CO hold and the boards' open-CO count read this view.

Documents (phases 2, 4 and 6)

• assets: id uuid, sha256 (indexed, for dedupe), size, mime, original_name, storage_key (the path under ASSETS_DIR, unique), source (upload by default), source_ref jsonb, pages, uploaded_by, uploaded_at, packet_id (the packet it was uploaded for, without a foreign key; packet_pages and packet_docs are the real links).

Asset kinds (phase 4). An upload names its kind in the purpose field, and source_ref keeps {"purpose": kind}. No purpose means document. The type is read from the content, never from the name or the browser.

Kind	Types	Limit (setting)
drawing	PDF	25 MB (upload_max_bytes)
mtr	PDF, PNG, JPEG	25 MB (upload_max_bytes)
document	PDF, PNG, JPEG	25 MB (upload_max_bytes)
bom	XLSX, CSV	5 MB (upload_max_bytes_bom)

mime is one of application/pdf, image/png, image/jpeg, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet and text/csv. An XLSX is a zip that holds [Content_Types].xml and xl/workbook.xml; a plain zip is refused. A CSV is UTF-8 text with no NUL and no control character other than tab, CR and LF. An upload the virus scanner refuses is never stored, so it has no row.

• packet_docs: asset_id, kind, title, added_at, added_by, soft delete.
• qc_docs: project_id, unit_id, type, rev, asset_id, auto, superseded_by (the newer row), added_at, added_by.
• itps: one per unit (unit_id unique). template jsonb, frozen when the ITP is made. status (itp_status), signoff_* (with the signature and the signed PDF asset), reopen_*, version.
• itp_lines: key (unique per ITP), result, by, at, ncr, note, signature_id, row_version.
• itp_rejects: append-only. line_key, ncr (required), note, at, by. Every reject keeps its NCR id, even after the line is approved later.
• itp_blocks: block_key (unique per ITP), signed_at, signed_by, signature_id.

Append-only set

These tables have the ps_append_only row and TRUNCATE triggers, and ps_app holds only SELECT and INSERT on them:

audit_events, signin_attempts, signatures, project_renumbers, short_receipts, packet_transitions, qc_history, packet_log, itp_rejects, co_verifications.

The app role is refused by privilege first. The migrate role owns the tables, so the trigger refuses it. The views v_units and v_open_cos are SELECT only for ps_app.

Audit, settings, jobs (phases 1 and 3)

• audit_events (migration 0001): append-only. at, user_id, session_id, role_snapshot (system for the worker), action, subject_type, subject_id, packet_id, detail jsonb, it_reason, ip. A hash chain: row_hash is sha256 over prev_hash and the canonical JSON of the row, and prev_hash is the row before it. BRIN index on at.
• settings (migration 0001): key (text PK), value jsonb, version, updated_at, updated_by. Phase 3 adds the row feed, the feed settings as one JSON object (see FEED.md, "Settings"). A missing key takes its default. A save bumps version and sends ps_notify('ps_settings', ...) so the worker reschedules.

Phase 3, migration 0004:

• job_requests: one row per "Run now". job, requested_at, requested_by, note, claimed_run_id and claimed_at (set by the run that took it). Index on job where claimed_at is null. The app inserts the row and NOTIFYs ps_job_request in the same transaction.
• job_runs: one row per run. job, trigger (schedule, request, chain, cli), requested_by uuid[] (the requests claimed), started_at, finished_at, status (running, ok, degraded, failed, skipped, abandoned), counts jsonb, errors jsonb (a list of redacted strings), build_version, visual_target ("<server> / <database>"), host. Index on (job, id DESC).
• job_schedule: one row per job (job PK). next_run_at, interval_seconds, paused, updated_at. Written by the worker after each run for the Admin tab. Seeded for visual-feed, drawing-lookup and housekeeping.
• worker_heartbeat: a single row (id = 1 by CHECK). at, build, host, pid, running text[] (the jobs running now). Upserted every 30 seconds.

Notifications (phases 4 and 9)

Phase 4, migration 0005:

• notification_events: one row per alert. id bigserial, kind (text, for example assets_quota), severity (info, warning or critical by CHECK, default warning), subject (what the alert is about, for example assets), detail jsonb (for the quota alert, the volume usage: total, used, free, pct, warn), created_at, resolved_at (set when the condition clears), acknowledged_at and acknowledged_by (an Admin saw it). The unique index notification_events_open on (kind, coalesce(subject, '')) where resolved_at is null keeps one open alert per kind and subject, so a check that runs again does not stack rows. The table is not append-only: the app sets resolved_at and the acknowledgement. 0005 also grants ps_app USAGE and SELECT on every sequence in the schema.

Phase 9 builds the delivery on this table: rules, recipients, exclusions, outbox, sent log, state.

VISUAL and drawing caches (phase 3)

Migration 0004. Every ID part is text (wo_base, lot, split, sub, part IDs, order IDs), with '' in place of null in a key. seq and piece are int. Closed sets are text with a CHECK. The worker fills these tables. Screens read them, never VISUAL. FEED.md says how each is written.

• visual_batches: one row per feed run. run_id, started_at, finished_at, server, database, site, since and until (the window), window_rows, tracked_keys, missing_keys, suspect, counts jsonb.
• visual_rows: one row per work order operation (TYPE W), unique on (wo_base, lot, split, sub, seq). The contract fields: res, dwg, rev, ps (partspecs), descr, qty, tgt, rel, want, st (the status code F, R, U, C, X or ''), part, barcode. row_hash (sha256 of the canonical row), first_batch, last_batch and gone_batch (set when a row in play was not read; cleared when it returns). Indexes on (wo_base, lot), on dwg, and on rel for rows not gone.
• visual_materials: one row per material line, unique on (wo_base, lot, split, sub, seq, piece). part (null for a line with no part), qty, issued, whs, loc, st, istat, dwg, descr, comm, cons, mat_hash, first_batch, last_batch, gone_batch. Index on (wo_base, lot).
• visual_orders: one row per customer order (cust_order_id PK). status, customer_id, customer_name, customer_po_ref, order_date, desired_ship_date, promise_date, last_batch.
• visual_order_links: kind (base or project), key (the base or the project number), cust_order_id, rank (open first, newest first), lines int[], top_jobs text[], last_batch. Unique on (kind, key, cust_order_id). Replaced for every key read.
• visual_labor: ticket hours per leg, unique on (wo_base, lot, split, sub, seq). hours, tickets, last_ticket, observed_at. No cost or pay column.
• visual_row_changes: what VISUAL changed, per batch. batch_id, the key and seq, kind (added, changed, gone, returned), before and after jsonb (the row as text values), at. Index on batch_id. visual_material_changes is the same plus piece.
• visual_ignored_wos: work orders kept out by the go-live date, unique on (wo_base, lot, split, sub). rel, project, unit_number, res, dwg, first_seen_batch, last_seen_at, and pulled_in_at, pulled_in_by, pulled_in_reason when Clerical pulls one in.
• visual_resource_map: resource (PK), target (fold, ignore or a two-digit department code, by CHECK), confirmed, updated_at, updated_by. Seeded from the old build's visual_map.json, every entry unconfirmed. "Electical" is spelled that way in VISUAL.
• drawing_lookups: one row per drawing number as VISUAL writes it (dwg PK, trimmed). The last answer: checked_at, ok, rev (released), name, obj_id, obj_version, file_id, file_version, file_size, base (H sheet), draft_rev, draft_where, in_drafting, note. Retry state: fail_count, failing_since, next_check_at. The fetched file: asset_id, sha256. visual_rev_seen is the VISUAL rev at the last lookup, so a rev change moves the drawing to the front of the queue. A rev mismatch keeps the staged M-Files copy here for approval.

Column additions in 0004:

• packets: visual_cancelled_at and wo_gone_at, so boards can filter on cancelled and gone without reading flags.
• packet_work_orders: partspecs, rev and dwg, the leg's own planner instructions, rev and drawing as VISUAL has them. The header keeps the highest rev. The unique key now includes seq: 0004 drops the 0003 unique on (packet_id, wo_base, lot, split, sub) and adds UNIQUE NULLS NOT DISTINCT (packet_id, wo_base, lot, split, sub, seq), because the feed puts two operations of one work order on one packet. Hand drafts keep seq null, so they still have one row per key.
• projects: order_date_visual, ship_date_visual, order_ref jsonb (the chosen order and how it was chosen), and the Clerical pin order_pin (a customer order ID), order_pin_by, order_pin_at, order_pin_reason.
• units: customer, po, customer_visual, po_visual, order_date_visual, ship_date_visual, order_ref, and the same pin columns.
• change_orders: nothing new. vis, waiting, staged, target_fp and minor came in 0003.

Versioning

• packets.version goes up by one in every write transaction that touches the packet or any of its children. The write pipeline does it explicitly (UPDATE packets SET version = version + 1 ... RETURNING version) after the caller's SQL. No trigger bumps it, so a read never does. It is the packet ETag and the NOTIFY payload.
• projects.version, units.version and itps.version play the same part for those rows.
• Child rows that are edited in place carry row_version. A PATCH sends If-Match: <row_version>. A mismatch is 409 row_conflict with the current row. The write bumps row_version.
• Every write takes SELECT ... FOR UPDATE on the packet row first. That lock replaces the old 8-second lease and serialises the counters: next_weld_no, next_heat_no, next_page_no and next_co_no hand out the next number with UPDATE packets SET next_weld_no = next_weld_no + 1 RETURNING next_weld_no - 1, so two concurrent adds never get the same number.
• Transitions do not check version. They compare and set on expect: {status, dept}, so a weld edit never blocks a send.