Timestamp Conversion Performance
Mar 12, 2008
i have following problem. i'v designed a package which works pretty fine but now i discovered that i have performance troubles when trying to convert timestamps. I have a generated Timestamp [DT_DBTIMESTAMP], but i transfer the data to an AS/400 where i need the timestamp in the format "2008-03-12-13.37.32.000000". so i've used a derived column component with following conversion
REPLACE(REPLACE((DT_WSTR,50)ZEITPUNKT,":",".")," ","-") + ".000000"
is there a more performant way to do this? Because this makes the whole package really slow.
thx
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Nov 6, 2000
can i convert a timestamp data type
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Apr 4, 2000
I'm having trouble converting a timestamp value passed into a stored procedure as a char to binary(8). For example, the value passed in is
'00000000000002CA'. I want to convert to a binary(8) value so I can use this in the where clause of a query.
I can't seem to get the conversion to work correctly.
Thanks in advance for your help.
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Jul 20, 2005
I am working with an application that is returning a second basedtimestamp. It returns values based on the 86440 second day in GMT.Is there an ability within SQL Server to convert the value into anhour time value?I need to take this value and convert it to a hour value for the timezone the client is in.Thanks,Dave
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Jun 14, 2002
I need to pass a timestamp value to a varchar variable.CAST/Convert doesn't seem to help.
Any other work around ?
Thanks in advance.
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Jul 10, 2006
Hi,
I'm trying to persist a field of type java.sql.Timestamp to a column of type datetime in sql server 2005. I get an exception :
java.lang.UnsupportedOperationException: cannot perform lookups on timestamps. The field i'm trying to persist is a part of a composite primary key. The detailed exception is as follows:
12:13:55,110 WARN [RequestProcessor] Unhandled Exception thrown: class java.lang.UnsupportedOperationException
12:13:55,110 WARN [RequestProcessor] Unhandled Exception thrown: class java.lang.UnsupportedOperationException
12:13:55,120 ERROR [[action]] Servlet.service() for servlet action threw exception
java.lang.UnsupportedOperationException: cannot perform lookups on timestamps
at org.hibernate.type.TimestampType.getHashCode(TimestampType.java:98)
at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:113)
at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:199)
at org.hibernate.engine.EntityKey.getHashCode(EntityKey.java:65)
at org.hibernate.engine.EntityKey.(EntityKey.java:38)
at org.hibernate.event.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:135)
at org.hibernate.event.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:106)
at org.hibernate.event.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:180)
at org.hibernate.event.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:31)
at org.hibernate.event.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:169)
at org.hibernate.event.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:25)
at org.hibernate.event.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:65)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:479)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:474)
I have tried these with my other tables and never got an exception. but this is the first time i'm trying timestamp to datetime conversion with a primary key.
Can anyone suggest what could be the reason?
Thanks, Nithya.
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Sep 20, 2006
I have a varchar(max) field that is on its way to a Term Lookup task, so it requires conversion to DT_NTEXT before it gets there. The conversion is taking a really, really, really long time. In my current example I have about 400 rows. Granted the length of the varchar(max) if I 'select max(len(myColumn))' is approximately 14,000,000 so I understand that I'm moving a lot of data. But I'm on a x64 machine with 4 dual core processors and watching Task Manager I can see that I'm only using 1 core out of 8. Anything I'm missing that can speed this up?
Thanks,
Frank
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Jun 19, 2007
I am populating oracle source in Sql Server Destination. after few rows it fails it displays this error:
[OLE DB Destination [16]] Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft OLE DB Provider for SQL Server" Hresult: 0x80004005 Description:
"Invalid date format".
I used this script component using the following code in between the adapters, However after 9,500 rows it failed again giving the same above error:
To convert Oracle timestamp to Sql Server timestamp
If Row.CALCULATEDETADATECUST_IsNull = False Then
If IsDate(DateSerial(Row.CALCULATEDETADATECUST.Year, Row.CALCULATEDETADATECUST.Month, Row.CALCULATEDETADATECUST.Day)) Then
dt = Row.CALCULATEDETADATECUST
Row.CALCULATEDETADATECUSTD = dt
End If
End If
I don't know if my code is right . Please inform, how i can achieve this.
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Jun 23, 2015
date time s-sitename TimeTaken(Seconds)
6/8/2015 10:56:26 TestSite 100
6/8/2015 10:56:26 TestSite 500
6/8/2015 10:56:26 TestSite 800
6/9/2015 11:56:26 TestSite 700
6/9/2015 11:56:26 TestSite 200
6/12/2015 12:56:26 TestSite 700
I have a table with above values, I am looking for a sql query to find AvgTimeTaken at different time stamps and total count of each time stamp
Output
date time s-sitename TimeTaken(Seconds) Count_of_Request
6/8/2015 10:56:26 TestSite 1400 3
6/9/2015 11:56:26 TestSite 900 2
6/12/2015 12:56:26 TestSite 700 1
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Jul 10, 2007
For starters, please feel free to move this if it is in the wrong forum.
The issue I have is this. I have been asked to delete all information from a table that was inserted before May 12 this year. The issue is that when the DB was created, whoever designedd it neglected to add a timestamp column for the user data table (the one I need to purge). Does SQL, by default, happen to store insert times? Would it be something that might hide ina log file somewhere?
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Sep 12, 2004
1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
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Jun 23, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
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Apr 2, 2007
how to insert a value into table where the fieldname uses a datatype timestamp.(asp.net2.0)
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Jun 6, 2007
I have a timestamp in a date field of a table I have but when run it does not enter the date automatically and all I get is system.byte[] display where the dtae and time should be, how can i get it so this field places the date in automatically.???
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Jun 20, 2007
I am retrieving data from a database, and have been noticing some really strange timestamps. Has anyone ever seen a timestamp that looks like this: 16777215Karls
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Jul 12, 2004
Hello,
I just started using SQL and i don't really know too much syntax.
I have an ASP page that is inserting data into a table called YellowAlerts.
The first field in this table is AlertDate. I thought I read somewhere that there is a timestamp feature. If anyone could help me out that would be great.
Thanks.
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Jul 6, 2000
How can I add a timestamp column to a table that will let me know when
a record was inserted? (perhaps by setting a default to that column?)
For some reason, @@currenttimestamp gives me
some binary garbage.
Please help with any suggestions.
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Aug 23, 1999
How do I "disable" the timestamp so that when I copy my data into a new
database it will use the timestamp from the last time the table was effected?
Thanks,
Tracy
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Jun 2, 1999
Hi All,
I believe that all created tables have got by default a timestamp field.
I tried to find out how to read this field with a Transact-SQL statement.
And so I don't know the syntax, is anyone can help me ?
Thanks,
Herve
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Feb 10, 2005
If i have a table with a 3 fields and one of them has a timestamp as a field type and I want to do an insert or update what is the value I am inserting for the column timestamp.
Help appreciated
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Sep 23, 2006
hello I put a time stamp in one of my column and it says binary data in the field. How do i make that binary data turn into a real date and time. If this is possible how do I separate the date from the time in the results or would I have to do this myself. Also, I need to sort the results by date can this be done?
Sorry for the stupid questions my sql book (sql demystified) does not elaborate. Thanks
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Sep 4, 2006
hello,
m new to sql server.can any one tell me is it possible to insert only time value in timestamp datatype.
i have table which have datatype datetime.and i have to insert only time.i can't change the datatype datetime to any other one.p
plz any one can suggest me the solution..
Regards,
Sonal.
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Feb 12, 2008
Hello I'm not a SQL Expert but i'm using it for a few months. Now i need to use a variable that everytime that is called to a select into it gives the timestamp (or Stamp) to put on a specific field. The problem is that i need this variable not in bd conotation (like 2007-02-12 12:00:44:33) but like this 2007021212004433. Can someone help me? Thanks in advance.
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Jul 20, 2005
Is there any reason to have a TimeStamp column onto a table that has aPrimaryKey when using SQL Server and an Access front end?I read that doing so will always eliminate that write conflict error.But I notice that when pulling a recordset of 10K records, it takes 3Xless time if I delete the timestamp column on the table before runningthe SP.lq
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Jul 20, 2005
Is there any chance to get the content of a timestamp field?I am trying to get the content via Visual Objects and I am receiving onlynothing.Not NIL but "".Is it possible to get any useful information out of this field in anylanguage?(btw I know that the MS-Timestamp is not a timeformat)THXJens
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Jul 20, 2005
Is there any reason at all to use a timestamp column in a table havinga primarykey column???lq
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Nov 29, 2007
Hi there,
When inserting into a table with a timestamp column without explicitly setting the column_list you get the following.
ie.
insert into Table_A
select *
from Table_B
Cannot insert a non-null value into a timestamp column. Use INSERT with a column list or with a default of NULL for the timestamp column.
I was wondering if there's a way to overcome this without specifying the column list?
Thanks.
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Dec 10, 2007
HI every one
I have a timestamp column in my database. I want to use this column to get current changes but i am not able to get desired results when i use to compare that field in C#.
Thanks in advance
Take Care
ALLAH HAFIZ
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Apr 29, 2008
Hi folks, I am binding a gridview to a SQLDataSource that contains a timestamp column. My SQLDatasource contains an update method (via a stored procedure) that takes all of the data fields from the grid as input parameters. I am getting an error stating 'sql_variant is incompatible with timestamp' . The parameter definition for the update method specifies the timestamp column as type 'Object'. <UpdateParameters> <asp:Parameter Name="timestamp" Type="Object" /> ... </UpdateParameters> When the data is initially retrieved, the timestamp column is converted to a System.Byte[] however I cannot specify System.Byte[] in the parameter definition (different error) I have read other post with this issue but none seemed to have been solved (while still using SQLDataSource and binding).I have tried other datatypes and they do not work as well. Any help would be greatly appreciatedThanksTom
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Sep 10, 2004
I have a database that I don't want to lock. I decided that before any updates can occur I would check a timestamp value and ensure that nobody else updated before I did (avoiding the 'last update wins' scenario).
I have a problem, I can read the Timestamp from the db when I read the record. I currently use the data to pre-fill a form (gee go figure ;) ) and the user changes some values and updates.
I don't know what to DO with the timestamp value while I am holding it. I have tried putting it into a hidden field on the form but the value does not seem to translate back and forth.
Do I have to store it as in memory as part of the session or can I somehow convert to and from text??
I have about 0 experience working with byte arrays so the best answer is one with an example.
Thanks.
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Oct 4, 2005
Hi world,I would like to know how to maintain a table with a "timestamp" column. I mean a column that automatically set the current datetime when the row is updated.I don't want to go trought my application and set that in the update or insert command. I would like to know if there is a possibility of putting a trigger or something.thx
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Jan 12, 2002
Can I use "timestamp" datatype in SQL Server as the equivalent datatype for "binary" in ACCESS 2000?
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Feb 7, 2002
I have a table in SQL server 6.5 which has two columns. One is a timestamp column and another is an int column. Now I need to change the int column to numeric (16). For this I cannot use the alter table statement as it is not there in sql server 6.5. I tried creating another table with two columns- one as numeric(16) and the other as timestamp. I transferred the data from he old table to the new table and dropped the old table and finally renamed the new table as the name of the old table. But the problem is that the timestamp column now contains data that is different from the data that was there in the original column. I cannot update the timestamp column as that is done automatically neither can I insert the values. How do I make sure that the data in the timestamp column remains the same.
Any help would be greatly appreciated.
Vikram
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