SQL Server Internals

Crafted for the love ♥ of SQL Server

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SQL SERVER

STORAGE ENGINE

RELATIONAL ENGINE

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Our focus in this presentation will be the

Relational Engine

SQL SERVER RELATIONAL ENGINE

SQL Manager is the component at the heart

of SQL Server

SQL Manager

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T-SQL Execution

Query Execution

Open Data Services (ODS)Passes the query results to ODS for formatting it

into TDS messages

SQL Manager

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T-SQL Execution

Query Execution

Open Data Services (ODS)

Does stuff like mathematical calculations,

filtering

SQL Manager

Expression Service

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T-SQL Execution

Query Execution

Open Data Services (ODS)

Handles * Data definition statements like CREATE VIEW

* System tables This is more a part of the Storage Engine, than the Relational Engine

SQL Manager

Expression Service

Catalog Services

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T-SQL Execution

Query Execution

Open Data Services (ODS)

* SQL Server scheduler * Assigns fibers and threads * Helps SQL Server load balance * Helps prevent thrashing

SQL Manager

Expression Service

Catalog Services User Mode Scheduler (UMS)

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Happy DBA’ing!

See you soon with another interesting crucial SQL Server concept!

Until then …

iKosmik

http://www.sqlserverapp.com/

Referenced from https://msdn.microsoft.com/en-us/library/

aa226174(v=sql.70).aspx

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