Equipment Property Value

Overview

The EquipmentPropertyValue entity stores the actual values of properties for individual equipment records. This table links properties defined in EquipmentProperty to specific Equipment records, storing the value for each assigned property. A unique constraint on equipment_id and property_id prevents duplicate property assignments for the same equipment.

Table Structure

The following table outlines the SQL columns for the equipment_property_values table, providing a brief description of each.

Column	Type	Description	Example
id	String (ULID)	Unique identifier for the entity.	01JAP8RJBN-8ZTPXSGY-J9GSDPE1
enabled	Boolean	If the entity is enabled or not.	true
created_date	DateTime	Date the entity was created.	2024-12-31T19:48:44Z
created_by	String	Person who created the entity.	TamakiMES
modified_date	DateTime	Date the entity was modified. Value is null upon creation, and gets initially populated upon the first edit.	2024-12-31T19:48:44Z
modified_by	String	Last person to modify the entity. Value is null upon creation, and gets initially populated upon the first edit.	TamakiMES
notes	String	Notes about the entity.	This entity has these extra notes
spare1	String	The first spare column that can be used for additional context on the entity.	some extra context 1
spare2	String	The second spare column that can be used for additional context on the entity.	some extra context 2
spare3	String	The third spare column that can be used for additional context on the entity.	some extra context 3
data_type	String (Enum)	Data type of the property value, corresponding to the property's data type.	Float8
int_value	BigInt	Integer value if the property type is Int8.	100
float_value	Double	Floating-point value if the property type is Float8.	250.0
string_value	String	String value if the property type is String.	Pump-101-Serial
date_value	DateTime	Date value if the property type is DateTime.	2024-05-01 00:00:00
blob_value	Blob	Binary data if the property type is ByteArray.	N/A
equipment_id	String (ULID)	References the Equipment associated with this property value. See equipments.	01JAP8R5RT-3FPXQABY-7KQZT6VF
property_id	String (ULID)	References the EquipmentProperty assigned to this equipment. See equipment_properties.	01JAP8RJBN-4VYZUKE1-LY2QHV8X

Field Details

blob_value, date_value, float_value, int_value, string_value

These columns hold the actual property values, with the relevant field populated based on the data_type of the property. For example:

• blob_value is used if the property is a binary type.
• date_value stores date values.
• float_value holds floating-point values.
• int_value stores integer values.
• string_value holds text-based values.

equipment_id

References the Equipment associated with this property value, enabling specific property settings per equipment record. See equipments for details.

property_id

References the EquipmentProperty assigned to the equipment, linking to a defined property and its characteristics. See equipment_properties for details.

Relationship Structure

Each entry in the equipment_property_values table assigns a specific value to a property for an individual equipment record, allowing unique configurations across equipment. The table uses a composite unique key on equipment_id and property_id to prevent duplicate property assignments for the same equipment.