--- title: Oracle - Parallel degree and hash group size values (Business Rule) description: These business rules check the Oracle properties Parallel Degree of Statistics Calculation and Hash Group Size. --- [Skip to content](https://knowledge.bigenius-x.com/oracle-parallel-degree-and-hash-group-size-values-business-rule#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. [Best practices](https://knowledge.bigenius-x.com/best-practices?hsLang=en) 3. [Business Rules](https://knowledge.bigenius-x.com/best-practices?hsLang=en#business-rules) # Oracle - Parallel degree and hash group size values (Business Rule) **Applies to** Platform: Oracle These business rules check the Oracle properties Parallel Degree of Statistics Calculation and Hash Group Size. Each must be empty or a whole number of at least 1; other values raise an error, which blocks generation in the client. The rule IDs are ID-20005 and ID-20006 for the parallel degree, and ID-33003 and ID-33004 for the hash group size. ### Messages Each message names the model object and its type in place of `` and ``. The details name the properties by their identifiers `StatisticParallelDegree` and `HashGroupSize`. The Generate Artifacts page lists the messages without the rule ID. #### Parallel degree is not a number The client shows an error with this text: ``` Model object '' of type '' has property 'StatisticParallelDegree' set to a non numeric value. Only numeric values are allowed. ``` On the model object card, point to the error icon to see this message with the rule ID: Error ID-20005. Cause: Parallel Degree of Statistics Calculation holds a value that is not a whole number. Fix: enter a whole number of at least 1, or clear the value. Data Vault views use the same ID for another rule, see [Current View and History View sources (Business Rule)](https://knowledge.bigenius-x.com/current-view-and-history-view-sources-business-rule?hsLang=en). #### Parallel degree below 1 The client shows an error with this text: ``` Model object '' of type '' has property 'StatisticParallelDegree' set to a value smaller than 1. Only values greater than or equal to 1 are allowed. ``` On the model object card, point to the error icon to see this message with the rule ID: Error ID-20006. Cause: Parallel Degree of Statistics Calculation is `0` or negative. Fix: enter a whole number of at least 1, or clear the value. #### Hash group size is not a number The client shows an error with this text: ``` Model object '' of type '' has property 'HashGroupSize' set to a non numeric value. Only numeric values are allowed. ``` On the model object card, point to the error icon to see this message with the rule ID: Error ID-33003. Cause: Hash Group Size holds a value that is not a whole number. Fix: enter a whole number of at least 1, or clear the value. #### Hash group size below 1 The client shows an error with this text: ``` Model object '' of type '' has property 'HashGroupSize' set to a value smaller than 1. Only values greater than or equal to 1 are allowed. ``` On the model object card, point to the error icon to see this message with the rule ID: Error ID-33004. Cause: Hash Group Size is `0` or negative. Fix: enter a whole number of at least 1, or clear the value. ### Check the result The error icon is gone from the model object, and generation is no longer blocked by it. ### Example In a Data Vault project on Oracle, the Hub `common_employee` gets Parallel Degree of Statistics Calculation `0`. The client shows: ``` Model object 'common_employee' of type 'Hub' has property 'StatisticParallelDegree' set to a value smaller than 1. Only values greater than or equal to 1 are allowed. ``` ### Release differences - Generator 2.0: checks of Parallel Degree of Statistics Calculation (ID-20005, ID-20006). - Generator 2.3: checks of Hash Group Size (ID-33003, ID-33004). ### Related articles - Reference: [Partition Clause and table storage (Model Object)](https://knowledge.bigenius-x.com/partition-clause-and-table-storage-model-object?hsLang=en), [Hash Group Size (Model Object)](https://knowledge.bigenius-x.com/hash-group-size-model-object?hsLang=en) - See also: [Current View and History View sources (Business Rule)](https://knowledge.bigenius-x.com/current-view-and-history-view-sources-business-rule?hsLang=en), [Understand warnings and errors](https://knowledge.bigenius-x.com/understand-warnings-and-errors?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) - 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