sys.dm_exec_sql_text (Transact-SQL)

sql_handle

Is the SQL handle of the batch to be looked up. sql_handle is varbinary(64). sql_handle can be obtained from the following dynamic management objects:

• sys.dm_exec_query_stats

• sys.dm_exec_requests

• sys.dm_exec_cursors

• sys.dm_exec_xml_handles

• sys.dm_exec_query_memory_grants

• sys.dm_exec_connections

plan_handle

Is an identifier for the query plan.

For more information, see sys.dm_exec_text_query_plan (Transact-SQL).

Requires VIEW SERVER STATE permission on the server.

For batches, the SQL handles are hash values based on the SQL text. For database objects such as stored procedures, triggers or functions, the SQL handles are derived from the database ID, object ID, and object number. plan_handle is a hash value derived from the compiled plan of the entire batch.

A. Obtaining information about the top five queries by average CPU time

SELECT TOP 5 total_worker_time/execution_count AS [Avg CPU Time],
    SUBSTRING(st.text, (qs.statement_start_offset/2)+1, 
        ((CASE qs.statement_end_offset
          WHEN -1 THEN DATALENGTH(st.text)
         ELSE qs.statement_end_offset
         END - qs.statement_start_offset)/2) + 1) AS statement_text
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS st
ORDER BY total_worker_time/execution_count DESC;

B. Providing batch-execution statistics

SELECT s2.dbid, 
    s1.sql_handle,  
    (SELECT TOP 1 SUBSTRING(s2.text,statement_start_offset / 2+1 , 
      ( (CASE WHEN statement_end_offset = -1 
         THEN (LEN(CONVERT(nvarchar(max),s2.text)) * 2) 
         ELSE statement_end_offset END)  - statement_start_offset) / 2+1))  AS sql_statement,
    execution_count, 
    plan_generation_num, 
    last_execution_time,   
    total_worker_time, 
    last_worker_time, 
    min_worker_time, 
    max_worker_time,
    total_physical_reads, 
    last_physical_reads, 
    min_physical_reads,  
    max_physical_reads,  
    total_logical_writes, 
    last_logical_writes, 
    min_logical_writes, 
    max_logical_writes  
FROM sys.dm_exec_query_stats AS s1 
CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2  
WHERE s2.objectid is null 
ORDER BY s1.sql_handle, s1.statement_start_offset, s1.statement_end_offset;

Reference