Eryxon MES Database Schema

This document provides a comprehensive overview of the database schema for AI agents working with the Eryxon Manufacturing Execution System.

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Table of Contents

• Core Concepts
• Entity Relationship Diagram
• Core Tables
• ERP Sync Fields
• Status Enums
• Key Functions
• Integration Tables
• Useful Queries
• MCP Tool Interactions

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Core Concepts

Multi-Tenancy

All tables include a tenant_id column referencing the tenants table. Row-Level Security (RLS) policies enforce tenant isolation. Always include tenant_id in queries.

Soft Delete

Core tables support soft delete via:

• deleted_at - Timestamp when record was deleted (NULL = active)
• deleted_by - UUID of user who performed deletion

External ID Tracking (ERP Sync)

Tables supporting ERP integration include:

• external_id - Unique identifier from external system
• external_source - Source system name (e.g., ‘SAP’, ‘NetSuite’)
• synced_at - Last sync timestamp
• sync_hash - MD5 hash for change detection

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Entity Relationship Diagram

┌──────────────┐
│   tenants    │
└──────┬───────┘
       │
       │ 1:N
       ▼
┌──────────────┐
│    jobs      │
└──────┬───────┘
       │
       │ 1:N
       ▼
┌──────────────┐     ┌──────────────┐
│    parts     │────►│  assignments │
└──────┬───────┘     └──────────────┘
       │
       │ 1:N
       ▼
┌──────────────┐     ┌──────────────┐     ┌──────────────┐
│  operations  │────►│    issues    │     │  time_entries│
└──────┬───────┘     └──────────────┘     └──────────────┘
       │
       │ N:N
       ▼
┌──────────────┐     ┌──────────────┐
│  resources   │◄────│operation_res │
└──────────────┘     └──────────────┘

┌──────────────┐
│    cells     │ (Work Centers / Stages)
└──────────────┘

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Core Tables

tenants

Root table for multi-tenant isolation. Contains subscription and billing info.

Column	Type	Description
id	UUID	Primary key
name	TEXT	Tenant name
company_name	TEXT	Company display name
plan	subscription_plan	free, pro, premium, enterprise
status	subscription_status	active, cancelled, suspended, trial
max_jobs	INTEGER	Job limit for plan
max_parts_per_month	INTEGER	Monthly parts limit
current_jobs	INTEGER	Current job count
current_parts_this_month	INTEGER	Parts created this month
demo_mode_enabled	BOOLEAN	Demo data active
timezone	TEXT	Factory timezone
factory_opening_time	TIME	Daily start time
factory_closing_time	TIME	Daily end time

jobs

Sales orders / production orders. Parent of parts.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
job_number	TEXT	Unique job identifier
customer	TEXT	Customer name
status	job_status	not_started, in_progress, completed, on_hold
due_date	TIMESTAMPTZ	Original due date
due_date_override	TIMESTAMPTZ	Manual override
current_cell_id	UUID	FK to cells (current work center)
notes	TEXT	Job notes
metadata	JSONB	Custom fields
external_id	TEXT	ERP external ID
external_source	TEXT	ERP source system
sync_hash	TEXT	Change detection hash
synced_at	TIMESTAMPTZ	Last sync time
deleted_at	TIMESTAMPTZ	Soft delete timestamp

Indexes:

• idx_jobs_external_sync - Unique on (tenant_id, external_source, external_id) WHERE external_id IS NOT NULL
• idx_jobs_active - Partial on (tenant_id, created_at DESC) WHERE deleted_at IS NULL

parts

Work orders / line items within jobs. Parent of operations.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
job_id	UUID	FK to jobs
part_number	TEXT	Part identifier
material	TEXT	Material type
quantity	INTEGER	Order quantity
status	job_status	not_started, in_progress, completed, on_hold
current_cell_id	UUID	FK to cells
drawing_no	TEXT	Drawing reference
cnc_program_name	TEXT	CNC program reference
parent_part_id	UUID	Self-reference for sub-assemblies
length_mm	NUMERIC	Dimensions
width_mm	NUMERIC	Dimensions
height_mm	NUMERIC	Dimensions
weight_kg	NUMERIC	Weight
material_lot	TEXT	Material traceability
material_supplier	TEXT	Supplier info
material_cert_number	TEXT	Certificate number
image_paths	TEXT[]	Part images
file_paths	TEXT[]	Attached files
is_bullet_card	BOOLEAN	Bullet card flag
external_id	TEXT	ERP external ID
external_source	TEXT	ERP source system
sync_hash	TEXT	Change detection hash
synced_at	TIMESTAMPTZ	Last sync time
deleted_at	TIMESTAMPTZ	Soft delete timestamp

Indexes:

• idx_parts_external_sync - Unique on (tenant_id, external_source, external_id) WHERE external_id IS NOT NULL
• idx_parts_active - Partial on (tenant_id, job_id) WHERE deleted_at IS NULL

operations

Routing steps / manufacturing operations within parts.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
part_id	UUID	FK to parts
cell_id	UUID	FK to cells (work center)
operation_name	TEXT	Operation description
sequence	INTEGER	Order in routing
status	task_status	not_started, in_progress, completed, on_hold
estimated_time	NUMERIC	Estimated hours
actual_time	NUMERIC	Recorded hours
setup_time	NUMERIC	Setup time in hours
run_time_per_unit	NUMERIC	Per-piece runtime
changeover_time	NUMERIC	Changeover time
wait_time	NUMERIC	Queue time
planned_start	TIMESTAMPTZ	Scheduled start
planned_end	TIMESTAMPTZ	Scheduled end
completed_at	TIMESTAMPTZ	Actual completion
completion_percentage	INTEGER	Progress 0-100
assigned_operator_id	UUID	FK to profiles
icon_name	TEXT	Display icon
external_id	TEXT	ERP external ID
external_source	TEXT	ERP source system
synced_at	TIMESTAMPTZ	Last sync time
deleted_at	TIMESTAMPTZ	Soft delete timestamp

Indexes:

• idx_operations_external_sync - Unique on (tenant_id, external_source, external_id) WHERE external_id IS NOT NULL
• idx_operations_active - Partial on (tenant_id, part_id) WHERE deleted_at IS NULL

cells

Work centers / manufacturing stages. Operations are performed at cells.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
name	TEXT	Cell/stage name
description	TEXT	Description
sequence	INTEGER	Display order
color	TEXT	Display color
icon_name	TEXT	Display icon
image_url	TEXT	Cell image
active	BOOLEAN	Is active
wip_limit	INTEGER	Work-in-progress limit
wip_warning_threshold	INTEGER	Warning threshold
enforce_wip_limit	BOOLEAN	Block at limit
show_capacity_warning	BOOLEAN	Show warnings
capacity_hours_per_day	NUMERIC	Daily capacity
external_id	TEXT	ERP external ID
external_source	TEXT	ERP source system
synced_at	TIMESTAMPTZ	Last sync time
deleted_at	TIMESTAMPTZ	Soft delete timestamp

resources

Equipment, tooling, and other resources.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
name	TEXT	Resource name
type	TEXT	Resource type (equipment, tool, fixture, etc.)
identifier	TEXT	Asset tag / serial number
description	TEXT	Description
location	TEXT	Physical location
status	TEXT	available, in_use, maintenance, etc.
active	BOOLEAN	Is active
metadata	JSONB	Custom fields
external_id	TEXT	ERP external ID
external_source	TEXT	ERP source system
synced_at	TIMESTAMPTZ	Last sync time
deleted_at	TIMESTAMPTZ	Soft delete timestamp

operation_resources

Many-to-many link between operations and resources.

Column	Type	Description
id	UUID	Primary key
operation_id	UUID	FK to operations
resource_id	UUID	FK to resources
quantity	INTEGER	Quantity required
notes	TEXT	Notes

profiles

User accounts. Linked to Supabase auth.users.

Column	Type	Description
id	UUID	Primary key (matches auth.users.id)
tenant_id	UUID	FK to tenants
email	TEXT	Email address
username	TEXT	Display username
full_name	TEXT	Full name
role	app_role	operator, admin
active	BOOLEAN	Is active
employee_id	TEXT	Employee ID for operators
pin_hash	TEXT	Hashed PIN for terminal login
has_email_login	BOOLEAN	Can login via email
is_machine	BOOLEAN	Machine account flag
is_root_admin	BOOLEAN	Root admin flag
onboarding_completed	BOOLEAN	Completed onboarding

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ERP Sync Fields

Sync Columns on Core Tables

Table	Columns
jobs	external_id, external_source, synced_at, sync_hash
parts	external_id, external_source, synced_at, sync_hash
operations	external_id, external_source, synced_at
resources	external_id, external_source, synced_at
cells	external_id, external_source, synced_at

sync_imports Table

Tracks batch import operations for audit.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
source	TEXT	’csv’, ‘api’, ‘erp_sap’, etc.
entity_type	TEXT	’jobs’, ‘parts’, ‘operations’, etc.
status	TEXT	pending, processing, completed, failed
total_records	INTEGER	Total records in batch
created_count	INTEGER	New records created
updated_count	INTEGER	Existing records updated
skipped_count	INTEGER	Unchanged records skipped
error_count	INTEGER	Records with errors
errors	JSONB	Error details array
file_name	TEXT	Original filename for CSV
started_at	TIMESTAMPTZ	Processing start
completed_at	TIMESTAMPTZ	Processing end
created_by	UUID	User who initiated

Sync Hash Function

-- Generate MD5 hash for change detection
SELECT generate_sync_hash('{"job_number": "J001", "customer": "ACME"}'::jsonb);

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Status Enums

job_status / task_status

'not_started' | 'in_progress' | 'completed' | 'on_hold'

issue_status

'pending' | 'approved' | 'rejected' | 'closed'

issue_severity

'low' | 'medium' | 'high' | 'critical'

app_role

'operator' | 'admin'

subscription_plan

'free' | 'pro' | 'premium' | 'enterprise'

subscription_status

'active' | 'cancelled' | 'suspended' | 'trial'

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Key Functions

Tenant Context

-- Get current user's tenant ID (from JWT)
SELECT get_user_tenant_id();

-- Get current user's role
SELECT get_user_role();

-- Check if user is root admin
SELECT is_root_admin();

Quota Functions

-- Check if can create a job
SELECT can_create_job(p_tenant_id);

-- Check if can create parts
SELECT can_create_parts(p_tenant_id, p_quantity);

-- Get tenant quota info
SELECT * FROM get_tenant_quota(p_tenant_id);

Activity Logging

-- Log activity and dispatch webhooks
SELECT log_activity_and_webhook(
  p_tenant_id,
  p_user_id,
  p_action,        -- 'create', 'update', 'delete'
  p_entity_type,   -- 'job', 'part', 'operation'
  p_entity_id,
  p_entity_name,
  p_description,
  p_changes,       -- JSONB of changes
  p_metadata       -- Additional metadata
);

Sync Hash Generation

-- Generate hash for change detection
SELECT generate_sync_hash(
  '{"job_number": "J001", "customer": "ACME"}'::jsonb
);

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Integration Tables

api_keys

REST API authentication keys.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
name	TEXT	Key name
key_hash	TEXT	bcrypt hash of full key
key_prefix	TEXT	First 8 chars for lookup
active	BOOLEAN	Is active
created_by	UUID	User who created
last_used_at	TIMESTAMPTZ	Last usage time

webhooks

Outbound webhook configurations.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
url	TEXT	Webhook endpoint URL
secret_key	TEXT	HMAC signing key
events	TEXT[]	Subscribed events
active	BOOLEAN	Is active

Webhook Events:

• job.created, job.updated, job.deleted
• part.created, part.updated, part.deleted
• operation.started, operation.completed
• issue.created, issue.resolved
• sync.jobs.completed, sync.parts.completed, sync.batch.completed

mqtt_publishers

MQTT publisher configurations for industrial integration.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
name	TEXT	Publisher name
broker_url	TEXT	MQTT broker URL
port	INTEGER	Broker port (default 1883)
username	TEXT	Auth username
password	TEXT	Auth password
use_tls	BOOLEAN	Use TLS/SSL
topic_pattern	TEXT	Topic pattern with placeholders
events	TEXT[]	Subscribed events
active	BOOLEAN	Is active
default_enterprise	TEXT	ISA-95 enterprise
default_site	TEXT	ISA-95 site
default_area	TEXT	ISA-95 area

mcp_authentication_keys

MCP server authentication keys.

Column	Type	Description
id	UUID	Primary key
tenant_id	UUID	FK to tenants
name	TEXT	Key name
key_hash	TEXT	bcrypt hash
key_prefix	TEXT	Lookup prefix
environment	TEXT	development, staging, production
enabled	BOOLEAN	Is enabled
allowed_tools	JSONB	Tool whitelist (null = all)
rate_limit	INTEGER	Requests per minute
usage_count	INTEGER	Total usage count

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Useful Queries

Get Active Jobs with Parts Count

SELECT
  j.id,
  j.job_number,
  j.customer,
  j.status,
  j.due_date,
  COUNT(p.id) as parts_count,
  SUM(CASE WHEN p.status = 'completed' THEN 1 ELSE 0 END) as completed_parts
FROM jobs j
LEFT JOIN parts p ON j.id = p.job_id AND p.deleted_at IS NULL
WHERE j.tenant_id = :tenant_id
  AND j.deleted_at IS NULL
GROUP BY j.id
ORDER BY j.due_date;

Get Part Routing (Operations)

SELECT
  o.id,
  o.sequence,
  o.operation_name,
  o.status,
  c.name as cell_name,
  o.estimated_time,
  o.actual_time,
  p.full_name as assigned_operator
FROM operations o
JOIN cells c ON o.cell_id = c.id
LEFT JOIN profiles p ON o.assigned_operator_id = p.id
WHERE o.part_id = :part_id
  AND o.deleted_at IS NULL
ORDER BY o.sequence;

Look Up by External ID

-- Find job by external ID
SELECT * FROM jobs
WHERE tenant_id = :tenant_id
  AND external_source = :source
  AND external_id = :external_id
  AND deleted_at IS NULL;

-- Find part by external ID
SELECT * FROM parts
WHERE tenant_id = :tenant_id
  AND external_source = :source
  AND external_id = :external_id
  AND deleted_at IS NULL;

Get Cell WIP Count

SELECT get_cell_wip_count(:cell_id, :tenant_id);

Get Operations in Cell

SELECT
  o.*,
  p.part_number,
  j.job_number,
  j.customer
FROM operations o
JOIN parts p ON o.part_id = p.id
JOIN jobs j ON p.job_id = j.id
WHERE o.cell_id = :cell_id
  AND o.tenant_id = :tenant_id
  AND o.status IN ('not_started', 'in_progress')
  AND o.deleted_at IS NULL
ORDER BY j.due_date, o.sequence;

Check Sync Status

SELECT
  entity_type,
  status,
  total_records,
  created_count,
  updated_count,
  skipped_count,
  error_count,
  completed_at
FROM sync_imports
WHERE tenant_id = :tenant_id
ORDER BY created_at DESC
LIMIT 10;

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MCP Tool Interactions

jobs Module

Tool	Tables Used
list_jobs	jobs, parts
get_job_details	jobs, parts, operations
create_job	jobs
update_job_status	jobs

parts Module

Tool	Tables Used
list_parts	parts, jobs, operations
get_part_details	parts, operations, cells
create_part	parts, jobs
update_part_status	parts

operations Module

Tool	Tables Used
list_operations	operations, parts, cells
start_operation	operations, time_entries
complete_operation	operations, time_entries
get_operation_details	operations, substeps, resources

erp_sync Module

Tool	Tables Used
erp_sync_diff	jobs, parts, resources
erp_sync_execute	jobs, parts, resources, sync_imports
erp_lookup_external_id	jobs, parts, operations, resources
erp_sync_status	sync_imports
erp_batch_lookup	jobs, parts, resources
erp_resolve_ids	jobs, parts, cells

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Best Practices

Always Include tenant_id

-- Good
SELECT * FROM jobs WHERE tenant_id = :tenant_id AND id = :job_id;

-- Bad - RLS will filter but explicit is better
SELECT * FROM jobs WHERE id = :job_id;

Check Soft Deletes

-- Good - exclude deleted records
SELECT * FROM jobs WHERE deleted_at IS NULL;

-- Explicit include for admin views
SELECT * FROM jobs WHERE deleted_at IS NOT NULL;

Use Sync Hash for Updates

-- Calculate hash before update
WITH new_hash AS (
  SELECT generate_sync_hash(:payload::jsonb) as hash
)
UPDATE jobs
SET
  customer = :customer,
  sync_hash = (SELECT hash FROM new_hash),
  synced_at = NOW()
WHERE id = :id
  AND (sync_hash IS NULL OR sync_hash != (SELECT hash FROM new_hash));

Batch Operations with Prefetch

-- Prefetch existing records by external_id
SELECT id, external_id, sync_hash
FROM jobs
WHERE tenant_id = :tenant_id
  AND external_source = :source
  AND external_id = ANY(:external_ids)
  AND deleted_at IS NULL;

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Schema Version

Last updated: 2024-12-06

Migration: 20251204000000_add_erp_sync_columns.sql