Performance Tuning with SQL Server Dynamic Management Views

Dissecting the SQL text
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Chapter 3: Query Plan Metadata
In Chapter 2, we saw how to use the sql_handle from sys.dm_exec_requests to
return the SQL text for the batch, from sys.dm_exec_sql_text, and then to dissect
the text using the "statement offset" columns provided by the former, to get at the text of
just the currently executing query.
We'll have to do the same thing when using sys.dm_exec_query_stats, in order to
extract query statistics about individual statements within a cached batch/procedure.
Let's take a look at the sql_handle, plan_handle and associated SQL text, returned
for each query in our stored procedure, as shown in Listing 3.3.
SELECT deqs.plan_handle ,
deqs.sql_handle ,
execText.text
FROM sys.dm_exec_query_stats deqs
CROSS APPLY sys.dm_exec_sql_text(deqs.plan_handle) AS execText
WHERE execText.text LIKE 'CREATE PROCEDURE ShowQueryText%'
Listing 3.3: Viewing the sql_handle and plan_handle.
As you can see, each row has the same sql_handle, same plan_handle and the same
SQL text (referring to the whole procedure). I'm only showing two of the rows here:
plan_handle sql_handle text
-------------- ------------- -----------------
0x050002003... 0x03000200... CREATE PROCEDURE
ShowQueryText as…
0x050002003... 0x03000200... CREATE PROCEDURE
ShowQueryText as…