sql server Execution plan 2012

kowsika devi
kowsika devi used Ask the Experts™
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hi,
Query is running in that wt are the terms i need to notice while execution in execution plan.
 How can i understand ?  ( physical operation ,Logical operation estimated execution mode,storage like that its showing and also the  picture select top like that its showing what is that how can i understand .)

I am attaching my simple one record execution plan.
exec-plan-understand.sqlplan
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Database Expert
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Commented:
In the picture attached ..

Select operator will ask the top operator that do you have a row for me. He then ask the clustered index scan that do you have a row for me ...then clustered index scan will say yes i do have row for you . Then row will flow from clustered index scan to top to select ... This loop will go on till the time we get all the rows. Now in between top will stop the execution as it only needs 1 row. So once he get his required rows, he breaks the loop , then whatever we have with select will be presented to the user.

So basically data is flowing from right to left and logic flows from left to right.
For logical and physical operators please read from my blog - https://msbiskills.com/2015/09/04/sql-server-logical-and-physical-operators/
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Vitor MontalvãoIT Engineer
Distinguished Expert 2017

Commented:
What are you really trying to understand?
The basics of the Execution Plan or the specific Execution Plan that you posted for your query?
Here are some graphical icons explanations that may help you.
A good help is to pass the cursor over each object in the Execution Plan as it will show more information about what's happening with your query.

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