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Filldataset taking long time in vb.net

I have the following sp Get_Patient

Declare @Ctdate varchar = dbo.fnSqlDateFormat_String(Getdate())

Select Top 100 A.Patientno,A.createdate,Titleid,B.Value Title,Patientname,
(Case when dd = 0 and mm = 0 and Yr > 0 then (Cast(yr as varchar) + ' Yr(s)')
when dd > 0 and mm = 0 and yr = 0 then (CAST(dd as varchar) + ' Day(s)')
When dd = 0 and mm > 0 and yr = 0 then (CAST(mm as varchar) + ' Month(s)')
Else '' End) Age,Sex,Phone1,Mobile1,email,A.LoginName,A.Concurrencyid,PAddress,
(case when (DOB is null) Or (DOB = '') then null else dbo.fnString_SqlDateFormat(DOB)End)DOB,
dd,mm,yr,A.rowid
from Master_Patient A
Left join
( Select rowid Id , fieldValue Value from Master_Common where field = 'Title'
)B on A.Titleid = B.Id --where PatientName like '%' + @Searchstring + '%' and blndisable = 0
Where A.Createdate = @Ctdate

When this sp is executed using filldataset , it executes very fast. but when i use the following way .. Where A.Createdate = dbo.fnSqlDateFormat_String(Getdate())
the filldataset is taking very long time to fill the dataset.

But in qry analyzer, both qry run very fast.

Can some expert tell what may be the reason

Jacques Bourgeois (James Burger)

Query Analyzer enables you to test and possibly increase the performance of a specific query. But it does not always show properly the way things are handled by the client.

But Dataset.Fill intervenes in some way. For instance you can pass parameters to a stored procedure through an EXEC call or through SqlParameter objects. The second one takes more code but is usually faster than calling EXEC, even if under the hood you are using the same stored procedure.

This probably comes into consideration in your tests.

venkataramanaiahsr

ASKER

execution time of filldataset of storedprocedure in the following two cases is different

1. Declare @Ctdate varchar = dbo.fnSqlDateFormat_String(Getdate())

. ... Where A.Createdate = @Ctdate ------Fast

2. .. Where Createdate = dbo.fnSqlDateFormat_String(Getdate()) -- Slow

Any specific reason ?

ASKER CERTIFIED SOLUTION

Bob Learned

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