i'd like to pass a datetime as parameter for a sybase stored procedure and use it for a query, but i always get the error
SQL Error: Syntax error during explicit conversion of VARCHAR value '2021-06-16 13:28:48.390' to a DATETIME field
My stored procedure is like:
create proc mystoredprocedure
#mydate varchar(50)
select * from mytable where date =CONVERT(DATETIME, #mydate, 121)
Call:
exec mystoredprocedure '2021-06-16 13:28:48.390'
Sybase docu for CONVERT code 121:
yyyy-mm-dd hh:nn:ss.sss (24 hour clock, ODBC canonical with milliseconds, 4-digit year)
Does anybody know why i get this error?
Thank you very much!
Andi
Assuming this is Sybase ASE ...
I'm unable to reproduce the issue in my ASE 15.7 instance (ie, your code works for me).
Can you try explicitly telling ASE how to parse the string by using the set dateformat command?
From the manauls re: the set command:
set dateformat format – sets the order of the date
parts (month/day/year) for entering datetime, smalldatetime, date
or time data. Valid arguments are 'mdy', 'dmy', 'ymd', 'ydm', 'myd',
and 'dym'. The us_english language default is 'mdy'.
In this case you'll want to try set dateformat 'ymd'.
Related
I am using Sybase DB and using dblib interface( C++ Interface) to connect and pass commands to Sybase DB.
I have one stored procedure added to Sybase DB. Below is the signature of stored procedure:
create procedure process_write #id varchar(35), #pTime datetime,#status tinyint
and I am calling this stored procedure with below :
process_write '000000100', '22/9/2022 10:18:37', 1
Now when I run my code I do not see error on console and the stored procedure executes successfully, But when I run this in isql command prompt, I get below error:
Msg 247, Level 16, State 1:
Server 'ABCXYZ', Procedure 'process_write':
Arithmetic overflow during implicit conversion of VARCHAR value '22/9/2022 10:18:37' to a DATETIME field .
(return status = -6)
I am not able to figure out how this is working in code but failing in isql console?
tl;dr
ASE defaults to processing strings of the format X/Y/Z as M/D/Y and this likely explains why your isql session is generating an error (ie, your isql session is running with mdy as its default dateformat). My guess is that somewhere in your dblib/C++ code you've either modified the dateformat or the language used by the dblib/C++ session which in turn insures your proc call works (ie, no conversion errors are generated).
I don't work with dblib/C++ so I don't know if you need to modify a db connection attribute or if you just issue a T-SQL command upon successful connection, eg:
set dateformat 'dmy'
In Sybase ASE when processing strings as dates it's necessary to tell ASE the ordering of the date components in strings like X/Y/Z.
From a strictly T-SQL point of view there are two set options that can tell ASE how to interpret X/Y/Z as a date:
set dateformat <format> - where <format> is one of 'mdy', 'myd', 'ymd', 'ydm', 'dmy' and 'dym'; default is 'mdy'
set languange <language> - where <language> is going to be based on what languages you've loaded into ASE; default is 'us_english' which causes the dateformat to default to 'mdy' [I don't have details on if/how individual languages may modify the dateformat so you would need to run some tests in your environment]
NOTES:
see T-SQL Users Guide: Date Formats and Reference Manual: Commands: set for more details.
to see the current dateformat in use for your session: select get_appcontext('SYS_SESSION','dateformat')
Demonstrating the use of set dateformat with a stored proc:
create proc testp
#pTime datetime
as
select #pTime
go
-------------
select get_appcontext('SYS_SESSION','dateformat')
go
---
mdy <<<--- ASE default
exec testp '22/9/2022 10:18:37'
go
Msg 247, Level 16, State 1:
Server 'ASE400', Procedure 'testp':
Arithmetic overflow during implicit conversion of VARCHAR value '22/9/2022 10:18:37' to a DATETIME field .
----------------
set dateformat 'dmy'
go
select get_appcontext('SYS_SESSION','dateformat')
go
---
dmy
exec testp '22/9/2022 10:18:37'
go
-------------------
Sep 22 2022 10:18AM
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I am using ADO.NET to pass a datetime parameter to a stored procedure and I am getting
Error converting data type varchar to datetime
on servers configured with DATEFORMAT ydm.
I have a simple stored procedure (it just takes a parameter and do nothing):
CREATE PROCEDURE [dbo].[TestDate]
#date AS datetime
AS
BEGIN
RETURN 0
END
I am executing it with ADO.NET by using datetime parameter:
Dim param As SqlParameter = New SqlParameter()
param.SqlDbType = SqlDbType.DateTime
param.Value = New Date(2021, 1, 13)
Execution on the SQL side looks like this:
EXEC sp_executesql N'EXEC dbo.TestDate #date = #date', N'#date datetime', #date = '2021-01-13 00:00:00.000'
and it works on most of our servers. Unfortunately one of our clients has different configuration. I have simulated this by adding SET DATEFORMAT ymd to previous execution, so when it runs it throws
Error converting data type varchar to datetime
SET DATEFORMAT ydm;
EXEC sp_executesql N'EXEC dbo.TestDate #date = #date', N'#date datetime', #date = '2021-01-13 00:00:00.000'
It seems like ADO.NET passes dates in a ODBC format which is sensitive to dateformat / language setting. Do you have some idea how to overcome this issue? (I have tried passing dates as strings in ISO 8601 format and it works with this example, but some of our other queries have other issues with that and I don't like this kind of "dirty tricks").
Edit:
Thanks for replies, I have checked sp code once more. I have further simplified the example: I have captured execution of real procedure with profiler on the client server and I have deleted all "noise code". On client environment (from application and Management Studio) I am getting
Error converting data type varchar to datetime
(which can be simulated by setting dateformat: SET DATEFORMAT dmy - I have checked it from DBCC USEROPTIONS):
exec sp_executesql N'',N'#date datetime',#date='2021-01-27 10:04:55.263'
Dates have no format, they're binary values. In .NET DateTime uses a tick count field internally. SQL Server uses several date types, none of which is based, parsed or stored as a string. ADO.NET passes parameters as separate, binary parameters to the RPC call to the server.
One way or the other the data access code that's missing is converting dates to strings instead of using parameterized queries.
This code wouldn't convert dates to strings or need parsing on the server:
Using con As SqlConnection = New SqlConnection(connectionString)
Using cmd As New SqlCommand("TestDate", con)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add("#date", SqlDbType.Date).Value = New Date(2021, 1, 13)
cmd.ExecuteNonQuery()
The type could be any of the date types, eg: SqlDbType.DateTime, SqlDbType.DateTime2 or SqlDbType.DateTimeOffset. The type that best matches the stored procedure parameter is Date
What about SSMS ?
In SSMS the queries are written as text. Even a parameter declaration in the end uses text. You need to provide the correct date literal to avoid localization issues.
datetime is a legacy type that's affected by DATEFORMAT unless a full ISO8601 string or an unseparated YYYYMMDD string is used. This means that YYYY-MM-DD can be parsed as YYYY-DD-MM if datetime is used.
The newer types don't have this problem. date, the correct type for this parameter and datetime2, datetimeoffset all recognize YYYY-MM-DD no matter what DATEFORMAT is.
This SQL Server stored procedure takes several parameters, and one of them is a datetime data type.
We've just began to localize the application in Europe, and the problem is that they're receiving this:
Error converting data type nvarchar to datetime.
I've done my reading on datetime, so I believe what is happening is the application is posting the date as dd/mm/yyyy to SQL Server, but since the database has a default language of English and expects mm/dd/yyyy, there is an error.
Sample input that produces error:
#LastUpdatedDate = N'21.01.2016 03:54:08'
My coworker in Europe said that when he set the default language of the database to German, the error quit occurring.
This error has not shown up in the USA/Canada, and I'm assuming that if the application AND SQL Server are running the same default datetime format, then no issues. However, we (here in USA), need to work with their application and database in Europe, so now we get the error.
Here's the stored procedure:
CREATE PROCEDURE [dbo].[addUser]
(
#UserID NVARCHAR ( 50 ),
#AccountID NVARCHAR( 50 ) = '00000000000000000000000000000000',
#Password NVARCHAR( 50 ),
#FirstName nvarchar(50),
#LastName nvarchar(50),
#Telephone nvarchar(25),
#Mobile nvarchar(25),
#FAX nvarchar(25),
#EmailAddress nvarchar(50),
#CurrentUserID nvarchar(50),
#LastUpdatedBy nvarchar(50),
#LastUpdatedDate datetime
)
AS
BEGIN TRANSACTION
INSERT INTO tbUsers (UserID, AccountID, Password, Status, VPID, EvalStatusID, FirstName, LastName, Telephone, Mobile, FAX, EmailAddress, LastUpdatedBy, LastUpdatedDate)
VALUES (#UserID, #AccountID, #Password, 'A', 'PM', 'ACTIVE', #FirstName, #LastName, #Telephone, #Mobile, #FAX, #EmailAddress, #LastUpdatedBy, #LastUpdatedDate)
I don't have access to the application code yet, but question is:
Is there a way to catch the error and fix the datetime input value depending on how database is configured?
I tried using SET DATEFORMAT dmy before the BEGIN TRANSACTION, but it errors out before that.
Yes, we could probably alter the application code to use a language-neutral datetime format, but that may not be feasible.
There are many formats supported by SQL Server - see the MSDN Books Online on CAST and CONVERT. Most of those formats are dependent on what settings you have - therefore, these settings might work some times - and sometimes not.
The way to solve this is to use the (slightly adapted) ISO-8601 date format that is supported by SQL Server - this format works always - regardless of your SQL Server language and dateformat settings.
The ISO-8601 format is supported by SQL Server comes in two flavors:
YYYYMMDD for just dates (no time portion); note here: no dashes!, that's very important! YYYY-MM-DD is NOT independent of the dateformat settings in your SQL Server and will NOT work in all situations!
or:
YYYY-MM-DDTHH:MM:SS for dates and times - note here: this format has dashes (but they can be omitted), and a fixed T as delimiter between the date and time portion of your DATETIME.
This is valid for SQL Server 2000 and newer.
If you use SQL Server 2008 or newer and the DATE datatype (only DATE - not DATETIME!), then you can indeed also use the YYYY-MM-DD format and that will work, too, with any settings in your SQL Server.
Don't ask me why this whole topic is so tricky and somewhat confusing - that's just the way it is. But with the YYYYMMDD format, you should be fine for any version of SQL Server and for any language and dateformat setting in your SQL Server.
The recommendation for SQL Server 2008 and newer is to use DATE if you only need the date portion, and DATETIME2(n) when you need both date and time. You should try to start phasing out the DATETIME datatype if ever possible
Update: if you're on SQL Server 2012 or newer, you could use the new TRY_PARSE function in T-SQL which allows you to parse strings representing dates safely. You can specify a locale to use, and if the parse doesn't work, you get back a NULL instead of an exception.
Try this:
DECLARE #input NVARCHAR(100) = N'21.01.2016 03:54:08'
SELECT
TRY_PARSE(#input AS DATE USING 'en-gb')
Should return a valid DATE value of Jan-21, 2016 - no matter what language/locale your SQL Server is set to
I have set the SQL Server's default language to "British". The following correctly returns 23...
sp_configure 'default language'
I have also set the language of my login to "British" too with...
sp_defaultlanguage #loginame = 'Login123', #language = 'British'
However, when I attempt to specify 13/12/2015 as a DateTime stored procedure parameter from ASP Classic, I get...
Error converting data type nvarchar to datetime.
From Management Studio, with the correct login, it works.
Why would ASP Classic have this effect? I'm pretty sure it's using the correct connection string.
EDIT:
Its not the connection string. Somehow the date's format is being converted incorrectly before being sent to the database. I can see this from Profiler.
Use CONVERT with style:
British/French
103 = dd/mm/yyyy
SELECT CONVERT(DATETIME, '13/12/2015', 103);
-- with stored procedure
DECLARE #d DATETIME = CONVERT(DATETIME, '13/12/2015', 103);
EXEC [dbo].[my_stored_procedure] #d;
Another method is to use ISO 8601 date literal which is culture independent:
The advantage in using the ISO 8601 format is that it is an international standard. Also, datetime values that are specified by using this format are unambiguous. Also, this format is not affected by the SET DATEFORMAT or SET LANGUAGE settings.
yyyy-mm-ddThh:mm:ss[.mmm]
EXEC [dbo].[my_stored_procedure] '2015-12-13T00:00:00'
In SQL,
declare #date datetime ='Jul15'
select CONVERT(varchar(10),#date,105)
getting error
Conversion failed when converting date and/or time from character
string.
Please help
It is because Jul15 is not a valid SQL Server Date or DateTime value, hence the error when it is trying to convert it to date/datetime to assign it to a datetime variable.
Ideally you should be using ANSI-Standard when working with date or datetime values in SQL Server, ANSI-Standard Date value has the format of YYYYMMDD, therefore your statement should look something like this.....
declare #date datetime ='20150701'
select CONVERT(varchar(10),#date,105)