Database

The database stores the messages in different tables.

Introduction

We are using the database TimescaleDB, which is based on PostgreSQL and supports standard relational SQL database work, while also supporting time-series databases. This allows for usage of regular SQL queries, while also allowing to process and store time-series data. TimescaleDB has proven itself reliable over the last 25 years, so we are happy to use it. If you want to know more about database paradigms, please refer to the knowledge article about that topic. It also includes a very succinct video summing up what there is to know about different paradigms.

Our database model is modeled to represent a physical manufacturing process.

It keeps track of the following data:

  • The state of the machine
  • The products that are produced
  • The orders for the products
  • The workers shift
  • Arbitrary process values (sensor data)
  • The producible products
  • Recommendations for the production

Please note, that our database does not use a retention policy. This means, that your database can grow quite fast, if you save a lot of process values. Take a look at our guide on enabling data compression and retention in TimescaleDB to customize the database to your needs.

A good method to check your db size would be to use the following commands inside postgres shell:

SELECT pg_size_pretty(pg_database_size('factoryinsight'));

assetTable

assetTable is contains all assets and their location.

configurationTable

configurationTable stores the configuration of the UMH system.

countTable

countTable contains all reported counts of all assets.

orderTable

orderTable contains orders for production.

processValueTable

processValueTable contains process values.

productTable

productTable contains products in production.

recommendationTable

recommendationTable contains given recommendation for the shop floor assets.

shiftTable

shiftTable contains shifts with asset, start and finish timestamp

stateTable

stateTable contains the states of all assets.

uniqueProductTable

uniqueProductTable contains unique products and their IDs.