Performance Tuning with SQL Server Dynamic Management Views

Chapter 3: Query Plan Metadata
( ( CASE WHEN deqs.statement_end_offset = -1
THEN DATALENGTH(execText.text)
ELSE deqs.statement_end_offset
END ) - deqs.statement_start_offset ) / 2)
END AS queryText
FROM sys.dm_exec_query_stats deqs
CROSS APPLY sys.dm_exec_text_query_plan(deqs.plan_handle,
deqs.statement_start_offset,
deqs.statement_end_offset)
AS detqp
CROSS APPLY sys.dm_exec_query_plan(deqs.plan_handle) AS deqp
CROSS APPLY sys.dm_exec_sql_text(deqs.plan_handle) AS execText
WHERE deqp.objectid = OBJECT_ID('ShowQueryText', 'p') ;
Listing 3.5: Returning the plan using sys.dm_exec_text_query_plan.
This time, for each row returned, we get the individual plan for each query, as well as the
batch plan, as shown in Figure 3.3.
Figure 3.3: Seeing the individual query plans.
Cached Query Plan Statistics
In the previous section, we explained how to use the sys.dm_exec_query_plan
function and sys.dm_exec_query_stats DMV to get the text of the plan for a given
batch. In this section, we'll start retrieving some meatier information about the query
plans that have been used to execute queries on the server.
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