Редактиране

Споделяне чрез

sys.fn_stmt_sql_handle_from_sql_stmt (Transact-SQL)

  • Статия

Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance

Gets the stmt_sql_handle for a Transact-SQL statement under the given parameterization type (simple or forced). You can refer to queries stored in the Query Store by using their stmt_sql_handle when you know their text.

Transact-SQL syntax conventions

Syntax

sys.fn_stmt_sql_handle_from_sql_stmt
(
    N'query_sql_text'
    , [ query_param_type ]
)
[ ; ]

Arguments

query_sql_text

The text of the query in the Query Store that you want the handle of. query_sql_text is nvarchar(max) with no default.

query_param_type

The parameter type of the query. query_param_type is tinyint, with a default of NULL. Possible values are:

Value Description
NULL (default) Defaults to 0
0 None
1 User
2 Simple
3 Forced

Columns returned

The following table lists the columns that sys.fn_stmt_sql_handle_from_sql_stmt returns.

Column name Type Description
statement_sql_handle varbinary(64) The SQL handle.
query_sql_text nvarchar(max) The text of the Transact-SQL statement.
query_parameterization_type tinyint The query parameterization type.

Return code values

0 (success) or 1 (failure).

Permissions

Requires EXECUTE permission on the database, and DELETE permission on the Query Store catalog views.

Examples

The following example executes a statement, and then uses sys.fn_stmt_sql_handle_from_sql_stmt to return the SQL handle of that statement.

SELECT *
FROM sys.databases;

SELECT *
FROM sys.fn_stmt_sql_handle_from_sql_stmt('SELECT * FROM sys.databases', NULL);

Use the function to correlate Query Store data with other dynamic management views. The following example:

SELECT qt.query_text_id,
       q.query_id,
       qt.query_sql_text,
       qt.statement_sql_handle,
       q.context_settings_id,
       qs.statement_context_id
FROM sys.query_store_query_text AS qt
     INNER JOIN sys.query_store_query AS q
         ON qt.query_text_id = q.query_text_id
CROSS APPLY sys.fn_stmt_sql_handle_from_sql_stmt(qt.query_sql_text, NULL) AS fn_handle_from_stmt
     INNER JOIN sys.dm_exec_query_stats AS qs
         ON fn_handle_from_stmt.statement_sql_handle = qs.statement_sql_handle;

Related content