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- Dictionaryper·sist/pərˈsist/
verb
- 1. continue firmly or obstinately in an opinion or a course of action in spite of difficulty, opposition, or failure: "the minority of drivers who persist in drinking" Similar Opposite
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Mar 11, 2015 · Marking a computed column as PERSISTED allows an index to be created on a computed column that is deterministic, but not precise. For more information, see Indexes on Computed Columns. Any computed columns used as partitioning columns of a partitioned table must be explicitly marked PERSISTED. computed_column_expression must be deterministic ...
Jul 18, 2018 · 5. You can think of persisted computed columns as computed columns with a cache that saves you the resources to compute the result every time you query it. The main advantage over normal columns is that you don't need to manage them yourself (after the initial definition). With a normal column, you'd have to make sure its value is properly ...
Nov 13, 2017 · (Edit) I will define this IsManager field when user request login(): I will get user's department field and check against managerDepartment's list to set it to true ou false. So the question is if it is right to put that information in a non-persistent field in the entity class (and how to do that) or if I may change the ResponseEntity in the rest method to add the additional information (and ...
Sep 27, 2018 · EDIT2: After 2 days of moving the data building indexes I found out that computed column (even though persisted) cannot be used in where clause of filtered index. Even after I moved it from filter expression to include columns (so that SQL can still perform selection just based on this index), the performance degraded extremely.
Oct 23, 2015 · This entity is persisted into a MySQL database via Hibernate. When I create this entity via my JSF page, persist it, then attempt to update this entity's status column without reloading my page in between creation and logically deleting it, the change to the status column does not get persisted.
Apr 8, 2010 · You can always also use a user-defined function for this - wrap your "complicated" code into an UDF, and use that to define your computed column: CREATE FUNCTION dbo.GetStatus(@DateTime1 DATETIME, @DateTime2 DATETIME) RETURNS INT. AS BEGIN. DECLARE @Result INT.
And maybe define what it means for an instance of an entity to be persistent? And if you could not use the word "persistent" (or any form of the word) in your definition that would be much appreciated.
Apr 2, 2014 · 'Cases (dbo)' table - Unable to create index 'PK_Cases_1'. Cannot define PRIMARY KEY constraint on nullable column in table 'Cases'. Could not create constraint. See previous errors.' I do not understand why I'm getting this error, since all NOT NULL columns in my table contain data. Any help or ideas would be greatly appreciated. Thanks! Edit ...
May 12, 2016 · The persisted? method return true if the object has been persisted. Persisted means the object has been saved in the database. You can only call it on ActiveRecord objects.
As a developer a column that is persisted computed is clearer in the intent than a default value. Default value implies it is one of many possible values not the only possible value. Be sure to declare the UDF With SchemaBinding. This will allow SQL Server to determine if the function is deterministic and flag it as so.
