SqlCEParameter With SQLDBType.Binary Won't Allow Size To Be Set &&> 510 Bytes
Nov 1, 2006
Here is my code:
Dim oParameter As New System.Data.SqlServerCe.SqlCeParameter("@pMyParameter", SqlDbType.Binary, 3000)
If you set a watch on this object, the size is set back to 510. I have tried resetting the size back to 3000 after construction using oParameter.Size, but it doesn't change from 510. If the command is executed using ExecNonQuery, this causes the bytes to get cut off at 510 bytes and returns the error: Byte array truncation to a length of 510.
Can I insert data into SQL Server 2005 Mobile Edition, into a field of data type binary(3000) using .NET CF 2.0 via SqlServerCe objects?
SqlCeParameter.Size seems to be limited to 255 characters for char types.
Eg.
SqlCeParameter param = new SqlCeParameter();
param.ParameterName = parameter_name;
param.DbType = DbType.String;
param.Size = 260;
Now check the value of param.Size, it will be 255.
In the past this problem was avoidable by setting the size to 0. However, this cause a problem if you are re-using the same command and simply changing the parameters value.
Somewhere the system remembers the length of the first value and adjusts the max size to be limited to this length.
Thus for the following values:
"Test"
"Testing"
The second one will error with something like "@param: String truncation: max = 4, len = 7, value = 'testing' "
Has anyone else come across this problem, or found a solution to it?
Hi, I'm specify the size of the interger dataypes in my code behind files; e.g. commad.Parameters.Add("@SomeID", SqlDbType.Int, 4) I know it may seem silly, but I have to ask: Will specifying ths size (i.e. 4) eventually stop the auto-icnrement of the underlying primary key SomeID in the SQL Server 2005 database? What restriction, if any, does this place if the next SomeID value is 10000, which is 5 digits? or 999999, which is 6 digits? Thank you
Sql Server has many data types. For Example: smallint Integer data from -2^15 (-32,768) through 2^15 - 1 (32,767). Storage size is 2 bytes. I want to know that If it contains like 0 or 100 or 1000 or -200 or -2000 or more or less. What will its actual size? 2 bytes or change with the value. Please also mention the reference with your answer. if available.
Hi, Im trying to create a VERY wide table, with 1,000 columns of type varchar(MAX), nullable. The CREATE TABLE statement (both in SQL 2005 & 2008), gives the following warning:
Warning: The table "WIDE_TABLE" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.
When I insert data into the table, filling all columns with small, 10-byte string values, I get the following error:
Msg 50000, Level 16, State 1, Procedure sp_pivot, Line 118
Cannot create a row of size 15034 which is greater than the allowable maximum of 8060.
Id like to verify this observation: each row is created with 2000 bytes of offset data (2 byte * 1000 columns), 125 bytes for null bitmap (1000 columns / 8 bits) and some more wasted? row information. This leaves less than 6K for the data itself. But since not all columns can fit within the page, forwarding pointers in the row need to be created, 24 byte per column, which very quickly add up to more than 8K, thus the error. So the 8K limit is met for much less columns than the max 1024 column restriction.
Furthermore, in SQL 2008, SPARSE columns will not solve the problem (maybe save some metadata? space in case the columns are null, but if not, Im with the same problem again, or even worse, since now each value takes more storage space. The max 30,000 columns in 2008 is only for cases where the column values are really sparseŚ
Is this the right observation? if so, is there a workaround besides splitting to multiple tables?
Hi, I have asked this question on 3 forums now and never get an answer, I don't know what is so hard about this question but I will try it here. I am using SHA512 in C# to convert a password and its salt to hashed. I need to store the password hash and the salt hash in the database in two fields. I was told to use binary field to store the hash data and that the output of SHA512 would ALWAYS be the same no matter how long the password is. I modified this hash example to use only SHA512 and to work with byte array instead of plain text. All I need to know now is what size I need to make my binary field to hold this password that is hashed. http://www.obviex.com/samples/Code.aspx?Source=HashCS&Title=Hashing%20Data&Lang=C%23 Say I have a password which is 30 characters max, and a salt which is 16 characters max. The password and the hash are stored in seperate fields in the same table. They are both hashed using SHA512 and are both being stored as byte arrays in C#, what size to I need to make the binary data type in order to hold the password, and to hold the salt. Thanks!
I have some code I build 2 weeks ago which Iâve been running daily but itâs suddenly stopped working with the following error.
âThe table "tbl_Intraday_Tmp" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limitâ When I google this there seems to be a related to tables with vast numbers of columns.
My table tbl_Intraday_tmp is relatively small. It has 7 columns. 1 of varchar(5), 3 of decimal(9,3) and 2 of decimal(18,0). The bit Iâm puzzled with is it was working and stopped.
I donât recall changing anything but I wouldnât rule that out. I âve inspected the source files and I donât believe they have changed either.
DECLARE Â Â Â Â Â Â Â Â Â Â Â Â Â @FileName varchar(50), @Path varchar(50), @SqlCmd varchar(1000) = '', @ASXCode varchar(5), @Offset decimal(18,0),
I have a function thats inserts data to a table with a SqlCeCommand with 42 Parameters. It had always worked perfectly with WMobile 2003 and WMobile 5 devices until now.
Recently I got 2 new pdas (both Phone Edition) which crash in that function with de following error: Exception An SqlCeParameter with ParameterName '@totallinesamountwithlinediscounts' is not contained by this SqlCeParameterCollection.
I tried putting a shorter name on the param and it worked (well, it failed because another long name param). To make sure it was a length problem it changed the long name with a dummy long name (@a234567890b234567890c234567890d23) and amazingly it worked.
After some tries I got that the failing parameters were: @TotalLinesAmountWithLineDiscounts @TotalLinesAmountWithAllDiscounts @TotalLinesAmountIncludingTax
I thought it could be caused because the parameters have similar names but when I replaced the params with: @a234567890b234567890c234567890d @a234567890b234567890c234567890d23 @a234567890b234567890c234567890d2345 It worked properly, and they have similar name also.
I've tried the same binaries and database on other devices and their work properly with the correct names.
I can make it work with this weird names but I would like to know the source of the problem to avoid future errors.
Does anyone have an idea of what may be the problem? Is there any known issue about problems with SqlCeParameters and different versions of Windows Mobile?
I came across a frustrating bug last week. Basically, whenever I tried to execute almost any sql query with unnamed parameters (i.e. using "?" instead of "@param_name" in the SQL text), an exception would be thrown.
After trying lots and lots of things and navigating my way through the internals of System.Data.SqlServerCe.dll, I discovered that the method System.Data.SqlServerCe.SqlCeCommand.CreateParameterAccessor(...) has a bug.
The bug is that the private arrays "parameters" and "metadata" are ordered differently, yet at one point in CreateParameterAccessor(...) they are compared using the same index. Here are the two lines: p = this.parameters[ i ]; and MetaData info = metadata[ i ] and then the column data types of "info" & "p" are incorrectly compared in a later method, ValidateDataConversion(...).
So take a step back... how are they ordered differently? From observation, I concluded the following: The "parameters" array is ordered exactly in the order that the DbParameter's were added to the DbCommand object. The "metadata" array is ordered according to the column order of the table in the database.
So what causes the exception? Well, CreateParameterAccessor(...) passes data types from two different columns (one type taken from parameters[ i ] and the other from metadata[ i ]) on to SqlCeType.ValidateDataConversion(...). And, of course, if they differ (e.g. one column is of type DateTime and the other is a SmallInt), an exception is thrown. I've found two workarounds, and both seem to work well. The first is to name the SqlCeParameters (e.g. "SELECT ... WHERE id=@id"). This causes the buggy branch of code to be completely bypassed.
The second is to add the SqlCeParameters in the exact same order as the columns exist in the table you are accessing. Note, I do *not* mean the order that you select the columns (e.g. "SELECT column1, column2, ..."). I mean the actual order of the columns in the database.
I've included my setup and a stack trace below to help if it can.
My setup is: .Net CF 3.5 SqlServer CE 3.5 Visual Studio 2008 Deployed to Pocket PC 2003
Here is the stack trace (note the variables passed to ValidateDataConversion):
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I'm not too certain what this error means so I manually deleted the records in this table. I got the same error.
