Parameter Sensitive Plan Optimization

SQLServerCentral Article

Exploring Parameter Sensitive Plan Optimization in SQL Server 2022

  • Article

PSPO (Parameter Sensitive Plan Optimization) is a SQL Server feature that improves query performance by accepting varied data sizes based on the runtime parameter value(s) specified by the customer. It deals with the situation in which a single cached plan for a parameterized query isn't the best option for all potential incoming parameter values. Non-uniform data distributions exhibit this phenomenon. When using PSPO, SQL Server keeps several execution plans for a single query, each one customized for a particular parameter value. With the help of this feature, numerous execution plans for a parameterized query are generated, each of which is tailored for a certain range of parameter values.

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2023-07-21

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Question of the Day

What's Wrong with this Table?

What's wrong with this code and causes an error?

CREATE TABLE Customer
(
    CustomerID INT NULL,
    FirstName NVARCHAR(50) NOT NULL,
    LastName NVARCHAR(50) NULL,
    Email NVARCHAR(100) NOT NULL,
CONSTRAINT CustomerPK PRIMARY KEY (CustomerID, LastName)
);


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