Question

我正在尝试收集有关某些SQL查询的统计信息。我正在使用 SqlDbConnection 类的 RetrieveStatistics（）方法来获取 SqlCommand 的统计信息和 ExecuteReader（）方法运行查询。 RetrieveStatistics（）方法返回填充了执行查询的统计信息的字典。当我运行常规查询时， SelectRows 字典的含义包含查询返回的实际行数。但是当我运行存储过程时，SelectRows总是为零，尽管读者肯定包含行。

我在每次查询前调用 ResetStatistics（）， StatisticsEnabled 设置为true。

这是我的Powershell代码：

### Stored procedure

$cn = New-Object system.data.sqlclient.sqlconnection
$cn.ConnectionString = "Data Source=localhost;Initial Catalog=XXXX;Integrated Security=SSPI"
$cn.StatisticsEnabled = $true
$cmd = $cn.CreateCommand()
$cmd.CommandText = "[dbo].[spGetXXXX]"
$cmd.CommandType = "StoredProcedure"
$cn.Open()
$cmd.ExecuteReader()
# several rows returned
$cn.RetrieveStatistics()

Name                           Value
----                           -----
BytesReceived                  300
SumResultSets                  1
ExecutionTime                  5
Transactions                   0
BuffersReceived                1
IduRows                        0
ServerRoundtrips               1
PreparedExecs                  0
BytesSent                      132
SelectCount                    1
CursorOpens                    0
ConnectionTime                 51299
Prepares                       0
SelectRows                     0
UnpreparedExecs                1
NetworkServerTime              3
BuffersSent                    1
IduCount                       0

### Regular SQL query
$cn2 = New-Object system.data.sqlclient.sqlconnection
$cn2.ConnectionString = "Data Source=localhost;Initial Catalog=XXXX;Integrated Security=SSPI"
$cn2.StatisticsEnabled = $true
$cmd2 = $cn2.CreateCommand()
$cmd2.CommandText = "SELECT * FROM XXXX"
$cn2.Open()
$cmd2.ExecuteReader()

#rows returned

$cn2.RetrieveStatistics()

Name                           Value
----                           -----
BytesReceived                  12357
SumResultSets                  1
ExecutionTime                  12
Transactions                   0
BuffersReceived                2
IduRows                        0
ServerRoundtrips               1
PreparedExecs                  0
BytesSent                      98
SelectCount                    1
CursorOpens                    0
ConnectionTime                 11407
Prepares                       0
SelectRows                     112
UnpreparedExecs                1
NetworkServerTime              0
BuffersSent                    1
IduCount                       0

Answer 1

两个查询之间的区别在于存储过程后调用阅读器保持打开状态，并且行号统计信息未更新。

所以正确的代码就像：

$connectionn.ResetStatistics()
$reader = $command.ExecuteReader()
$reader.Close() # !
$connection.RetrieveStatistics()

检索存储过程的统计信息，SelectRows始终为0

1 个答案: