--- title: BG_SourceSystem description: BG_SourceSystem holds an identifier of the source system a row comes from. --- [Skip to content](https://knowledge.bigenius-x.com/bg_sourcesystem#main-content) [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new?hsLang=en) [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal?hsLang=en) [![TRI\_Logo\_biGENIUS\_2020\_RGB\_s](https://knowledge.bigenius-x.com/hs-fs/hubfs/Marketing/TRI_Logo_biGENIUS_2020_RGB_s.png?width=150&height=42&name=TRI_Logo_biGENIUS_2020_RGB_s.png)](https://www.bigenius-x.com/) Open main navigation Close main navigation - [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new) - [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal) How can we help you? - There are no suggestions because the search field is empty. 1. [biGENIUS-X Knowledge Base](https://knowledge.bigenius-x.com/?hsLang=en) 2. [Generators](https://knowledge.bigenius-x.com/generators?hsLang=en) 3. [Default Terms](https://knowledge.bigenius-x.com/generators?hsLang=en#default-terms) # BG\_SourceSystem **Applies to** Platform: Microsoft SQL Server · Snowflake · Snowflake dbt · Databricks · Databricks dbt · Fabric Lakehouse · Fabric Warehouse · Oracle `BG_SourceSystem` holds an identifier of the source system a row comes from. Apart from Microsoft SQL Server file Stages, the generator fills it only where you map it. ### Objects that carry it Every model object type that the generator loads, from Stage to Mart, including Vault Out and Mart Out. PIT, Business PIT and Source objects do not carry it. Every object of these types gets the term when it is created. You map it in Manage Term Mappings. ### Value - Mapped: the value of the mapping, for example a constant such as `'CRM'` or a source term. - Not mapped: NULL. The value is not taken over from the source object, so a Hub that reads a Stage with a filled `BG_SourceSystem` still writes NULL unless you map the term in the Hub. - Stage of a Microsoft SQL Server file source: the loader writes the source directory and the file name. - Unknown-member row: `Unknown`. ### Data type | Platform | Type | | --- | --- | | Microsoft SQL Server | `nvarchar(255)` | | Fabric Warehouse | `varchar(255)` | | Oracle | `VARCHAR2(255)` | | Snowflake, Snowflake dbt | `VARCHAR(255)` | | Databricks, Databricks dbt, Fabric Lakehouse | `string` | ### Example A Hub on Microsoft SQL Server has no mapping for `BG_SourceSystem`. Its Source view therefore contains: ``` CAST(NULL AS NVARCHAR(255)) AS [BG_SourceSystem] ``` After the first load the Hub holds: ``` CUSTOMER_ID BG_SourceSystem 0 Unknown 940 NULL 941 NULL ``` ### Related articles - Reference: [BG\_LoadTimestamp](https://knowledge.bigenius-x.com/bg_loadtimestamp?hsLang=en) - See also: [Manage Default Terms](https://knowledge.bigenius-x.com/manage-default-terms?hsLang=en), [Stage](https://knowledge.bigenius-x.com/create-a-stage?hsLang=en), [Hub](https://knowledge.bigenius-x.com/create-a-hub?hsLang=en) - [Getting started](https://knowledge.bigenius-x.com/getting-started?hsLang=en#main-content) - [Guidelines](https://knowledge.bigenius-x.com/getting-started?hsLang=en#guidelines) - [Start working](https://knowledge.bigenius-x.com/getting-started?hsLang=en#start-working) - [Account](https://knowledge.bigenius-x.com/getting-started?hsLang=en#account) - [General overview](https://knowledge.bigenius-x.com/general-overview?hsLang=en) - [Artificial Intelligence](https://knowledge.bigenius-x.com/artificial-intelligence?hsLang=en) - [Application Modules](https://knowledge.bigenius-x.com/application-modules?hsLang=en#main-content) - [Administration](https://knowledge.bigenius-x.com/application-modules?hsLang=en#administration) - [Solutions](https://knowledge.bigenius-x.com/application-modules?hsLang=en#solutions) - [Global Features](https://knowledge.bigenius-x.com/application-modules?hsLang=en#global-features) - [Projects](https://knowledge.bigenius-x.com/application-modules?hsLang=en#projects) - [Branches](https://knowledge.bigenius-x.com/application-modules?hsLang=en#branches) - [Data Connections](https://knowledge.bigenius-x.com/application-modules?hsLang=en#data-connections) - [Dataflow Modeling - Overview](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-overview) - [Dataflow Modeling - Wizard Steps](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-wizard-steps) - [Dataflow Modeling - Terms](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-terms) - [Dataflow Modeling - Term Mapping](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-term-mapping) - [Dataflow Modeling - Relationships](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-relationships) - [Dataflow Modeling - Data Quality](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-data-quality) - [Dataflow Modeling - Indexes](https://knowledge.bigenius-x.com/application-modules?hsLang=en#dataflow-modeling-indexes) - [Relationship Modeling](https://knowledge.bigenius-x.com/application-modules?hsLang=en#relationship-modeling) - [Generate Artifacts](https://knowledge.bigenius-x.com/application-modules?hsLang=en#generate-artifacts) - [Project Settings](https://knowledge.bigenius-x.com/application-modules?hsLang=en#project-settings) - [Data Marketplace](https://knowledge.bigenius-x.com/application-modules?hsLang=en#data-marketplace) - [Generators](https://knowledge.bigenius-x.com/generators?hsLang=en#main-content) - [Fabric Warehouse](https://knowledge.bigenius-x.com/generators?hsLang=en#fabric-warehouse) - [Fabric Lakehouse](https://knowledge.bigenius-x.com/generators?hsLang=en#fabric-lakehouse) - [Databricks](https://knowledge.bigenius-x.com/generators?hsLang=en#databricks) - [Snowflake](https://knowledge.bigenius-x.com/generators?hsLang=en#snowflake) - [Microsoft SQL Server](https://knowledge.bigenius-x.com/generators?hsLang=en#microsoft-sql-server) - [Oracle](https://knowledge.bigenius-x.com/generators?hsLang=en#oracle) - [Artifacts](https://knowledge.bigenius-x.com/generators?hsLang=en#artifacts) - [Replace Placeholders](https://knowledge.bigenius-x.com/generators?hsLang=en#replace-placeholders) - [Target solution environment](https://knowledge.bigenius-x.com/generators?hsLang=en#target-solution-environment) - [Deployment](https://knowledge.bigenius-x.com/generators?hsLang=en#deployment) - [Deployment with an Azuze DevOps pipeline](https://knowledge.bigenius-x.com/generators?hsLang=en#deployment-with-an-azuze-devops-pipeline) - [Delta Deployment](https://knowledge.bigenius-x.com/generators?hsLang=en#delta-deployment) - [Load control environment](https://knowledge.bigenius-x.com/generators?hsLang=en#load-control-environment) - [Load data with a native load control](https://knowledge.bigenius-x.com/generators?hsLang=en#load-data-with-a-native-load-control) - [Load data with Apache Airflow](https://knowledge.bigenius-x.com/generators?hsLang=en#load-data-with-apache-airflow) - [Model Object Type](https://knowledge.bigenius-x.com/generators?hsLang=en#model-object-type) - [Properties](https://knowledge.bigenius-x.com/generators?hsLang=en#properties) - [Default Terms](https://knowledge.bigenius-x.com/generators?hsLang=en#default-terms) - [Discovery application](https://knowledge.bigenius-x.com/discovery-application?hsLang=en#main-content) - [Discovery configurations](https://knowledge.bigenius-x.com/discovery-application?hsLang=en#discovery-configurations) - [Best practices](https://knowledge.bigenius-x.com/best-practices?hsLang=en#main-content) - [Modeling Approaches](https://knowledge.bigenius-x.com/best-practices?hsLang=en#modeling-approaches) - [Use Cases](https://knowledge.bigenius-x.com/best-practices?hsLang=en#use-cases) - [Business Rules](https://knowledge.bigenius-x.com/best-practices?hsLang=en#business-rules) - [Data Quality Rules](https://knowledge.bigenius-x.com/best-practices?hsLang=en#data-quality-rules) - [FAQs](https://knowledge.bigenius-x.com/faqs?hsLang=en) - [Product Release Notes](https://knowledge.bigenius-x.com/product-release-notes?hsLang=en#main-content) - [SaaS Application](https://knowledge.bigenius-x.com/product-release-notes?hsLang=en#saas-application) - [Discovery application](https://knowledge.bigenius-x.com/product-release-notes?hsLang=en#discovery-application) - [Generators](https://knowledge.bigenius-x.com/product-release-notes?hsLang=en#generators) - [Legal Documents](https://knowledge.bigenius-x.com/legal-documents?hsLang=en#main-content) - [Current legal docs](https://knowledge.bigenius-x.com/legal-documents?hsLang=en#current-legal-docs) - [Software Product and Limits](https://knowledge.bigenius-x.com/legal-documents?hsLang=en#software-product-and-limits) - [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new?hsLang=en) - [Customer Portal](https://knowledge.bigenius-x.com/customer-portal) - [Sign in](https://knowledge.bigenius-x.com/_hcms/mem/login) [![biGENIUS logo](https://knowledge.bigenius-x.com/hubfs/TRI_Logo_biGENIUS_2020_RGB-1.svg "biGENIUS logo")](https://www.bigenius-x.com) All rights reserved © 2025, biGENIUS AG