BigQuery schema changes

This guide shows any updates on data schema changes when releasing new Manufacturing Data Engine (MDE) versions.

Changes from versions 1.2 to 1.3

Some BigQuery table schema changes from v1.2 to v1.3 are notbackwards-compatible. The following table describes these changes.

Record tables

All records in MDE v1.2 were stored in one of three archetype tables. In MDE v1.3, records are stored in tables per Type ( record tables ) where each Type is tied to a specific Archetype. The following table is an overview of the key changes in field names:

Nr	Archetype	Field name in v1.3 record table	Data type v1.3	Field name in v1.2 archetype table
1	All	id	string	id
2	All	tag_name	string	tagName
3	All	type_version	integer	N/A
4	All	embedded_metadata	JSON	payloadQualifier
5	All	cloud_metadata_ref	JSON	N/A
6	All	materialized_cloud_metadata	JSON	N/A
8	All	ingest_timestamp	timestamp	ingestTimestamp
9	All	source_message_id	string	messageId
10	DDS, CDS	data	JSON	payload
11	NDS	value	numeric	payload
12	DDS, NDS	event_timestamp	timestamp	eventTimestamp
13	CDS	event_timestamp_start	timestamp	eventTimestampStart
14	CDS	event_timestamp_end	timestamp	eventTimestampEnd
15	CDS	duration	integer	duration
16	NDS-C, DDS-C, CDS-C*	cluster_column_1	string	N/A
17	NDS-C, DDS-C, CDS-C*	cluster_column_2	string	N/A
18	NDS-C, DDS-C, CDS-C*	cluster_column_3	string	N/A
19	NDS-C, DDS-C, CDS-C*	cluster_column_4	string	N/A
20	All	N/A	N/A	uptime
21	All	N/A	N/A	downtime
22	All	N/A	N/A	currentState
23	All	N/A	N/A	previousState
24	All	N/A	N/A	payloadKV
25	All	N/A	N/A	edgeTagName
26	All	N/A	N/A	payloadQualifierKV
27	All	N/A	N/A	metadataKV
28	All	N/A	N/A	metadataKV

Archetype references:

• NDS-C: Numeric Data Series Clustered Archetype.
• DDS-C: Discrete Data Series Clustered Archetype.
• CDS-C: Continuous Data Series Clustered Archetype.