Obtain Sqlceresultset Table Schema With GetSchemaTable
May 4, 2006
I have a SqlCeResult pointing to a table :
Public conexion As Data.SqlServerCe.SqlCeConnection = New Data.SqlServerCe.SqlCeConnection("Data Source=iPAQ File StoreGestionAlmacenN.sdf")
Public ComandoCargaProductos As Data.SqlServerCe.SqlCeCommand = conexion.CreateCommand
Public ResultSetProductos As Data.SqlServerCe.SqlCeResultSet
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
conexion.Open()
'**********************************************************
'************Conexion con Tabla Productos******************
'ComandoCargaProductos.CommandText = "SELECT * from [Productos]"
ComandoCargaProductos.CommandType = Data.CommandType.TableDirect
ComandoCargaProductos.IndexName = "PK__Productos__0000000000000041"
ComandoCargaProductos.CommandText = "Productos"
ResultSetProductos = ComandoCargaProductos.ExecuteResultSet(Data.SqlServerCe.ResultSetOptions.Scrollable Or Data.SqlServerCe.ResultSetOptions.Updatable)
End Sub
And I want to obtain the schema of the table which my resultset is pointing
Dim tabla As Data.DataTable
tabla = Me.ResultSetProductos.GetSchemaTable
But the datatable that i obtain don´t seem to have the schema that i need, for example don´t have the primary keys i have define and also don´t have any constrains......
Does anybody know the problem?
Thanks for your help
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May 14, 2007
I see others having this problem when trying to run a query across a link from 2005 to a 2000 server. But we are already running SP4 on our 2000 server. What gives?
OLE DB provider "SQLNCLI" for linked server "s-1" returned message "Unspecified error".
OLE DB provider "SQLNCLI" for linked server "s-1" returned message "The stored procedure required to complete this operation could not be found on the server. Please contact your system administrator.".
Msg 7311, Level 16, State 2, Line 5
Cannot obtain the schema rowset "DBSCHEMA_TABLES_INFO" for OLE DB provider "SQLNCLI" for linked server "s-1". The provider supports the interface, but returns a failure code when it is used.
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Nov 6, 2007
SqlCeDataReader.GetSchemaTable Method
Returns a DataTable that describes the column metadata of the SqlCeDataReader
Problem
In its MSDN documentation, the Schema Table it returns dun contain "IsIdentity" column in comparison with SqlDataReader.GetSchemaTable Method.
But when I call SqlCeDataReader.GetSchemaTable in my program, it can return a schema table which contain "IsIdentity" column. However, its value is always False whatever the Data Table column is set to be Identity column. So I still can't know whether there is an identity or not.
How to solve it?
Or there are any methods which help to decide it is an Identity column?
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Jun 11, 2007
I know I can iterate through the schema table using the following.
Can I grab the actual value of each field while looping through the rows and columns?
schemaTable = reader.GetSchemaTable();
foreach (DataRow myDataRow in schemaTable.Rows)
{
foreach (DataColumn myDataColumn in schemaTable.Columns)
{
Console.WriteLine(myDataColumn + "= " + myDataRow[myDataColumn.ColumnName].ToString() );
}
}
An example is if one of the columns in the schema is called Firstname I would like to return:
Row 1
column name = Firstname
value= Bob
column name = Lastname
value= Smith
Row 2
column name = Firstname
value= Greg
column name = Lastname
value= Jones
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Sep 13, 2007
How can i get the current row index of SqlCeResultSet specially after calling Seek method?
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Sep 13, 2005
I’ve got a situation where the columns in a table we’re grabbing from a source database keep changing as we need more information from that database. As new columns are added to the source table, I would like to dynamically look for those new columns and add them to our local database’s schema if new ones exist. We’re dropping and creating our target db table each time right now based on a pre-defined known schema, but what we really want is to drop and recreate it based on a dynamic schema, and then import all of the records from the source table to ours.It looks like a starting point might be EXEC sp_columns_rowset 'tablename' and then creating some kind of dynamic SQL statement based on that. However, I'm hoping someone might have a resource that already handles this that they might be able to steer me towards.Sincerely,
Bryan Ax
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Oct 25, 2015
we have a table in our ERP database and we copy data from this table into another "stage"Â table on a nightly basis. is there a way to dynamically alter the schema of the stage table when the source table's structure is changed? in other words, if a new column is added to the source table, i would like to add the column to the stage table during the nightly refresh.
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May 17, 2007
Is there anyway to filter a existing SQLCEReusltSet?
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Aug 17, 2007
Hi
I am using SqlCeResult and i want to give paging on that and read in help that you can do paging on ResultSet so . I need code example so that i can understand how to implement this in resultSet.
Thanks & Regards
Vishal
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Jul 28, 2006
Hello,
I'd like to create a temporary table with the same schema as an exiting table. How can I do this without hard coding the column definitions into the temporary table definition?
I'd like to do something like:
CREATE TABLE #tempTable LIKE anotherTable
..instead of...
CREATE TABLE #tempTable (id INT PRIMARY KEY, created DATETIME NULL etc...
I'm sure there must be a simple way to do this!
Many thanks,
Ben S
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Aug 20, 2007
Hi
I have a table with an identity column. This is set to increase by 1 and start on 1, and is the first column of the table.
When I insert a record into the resultset, I get an error stating that it can't be DbNull.
Th record is created from a resultset with the query "Select * from table", so the id should be included
But as I understand it, it should be increasing automatically, right? Becuase that's the behaviour of the normal sql Insert command. I have seen an article that just left the id column in the record alone before inserting it, but it didn't help me.
How can I sidestep this issue?
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Sep 25, 2007
I am currently working with typed sqlceresultsets. I noticed that each resultset manages its own databaseconnection. I am considering to change this to a situation where I can reuse a databaseconnection on more than one sqlresultset.
Will this result in better performance? for example, when I have 2 updates for wicht I need 2 resultsets, wouldn't it be better to use 1 connection and transaction instead of each resultset creating/disposing its own? I would realy like to hear some oppinions. thanks!
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Aug 21, 2007
Hi,
I have an updateable sqlceresultset, which i use to bind to a datagrid. The user can modify values in the grid. I wish to update these values in the database only when the user has finished making these changes and clicks "Accept" button. But with the sqlceresultset, it looks like with every modification in the grid, the resultset is updated and change is written to the sdf database file . Please suggest how to work around this.
Thanks
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May 23, 2007
Hi I have written an Windows Mobile Application that insert 1000 records on SQL Compact 3.1 but I am having performance issues. If I use SqlCeResultSet and SqlCeUpdatableRecord in C# tha insert take 7 seconds to complete. But if I write a C++ application that uses OLEDB it takes only 4 seconds.
How can I improve the performance of the C# application? Also I would like to know if there is any possibility to use the same OLEDB objects that I use in C++ in a C# application.
Thanks a lot
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May 4, 2008
I have created my connection correctly
if (_deviceConn.State == ConnectionState.Closed)
_deviceConn.Open();
_deviceCMD = new SqlCeCommand("UPDATE metar SET observation='"+ Value1 +"',lastupdate='"+ Value2 +"',Valid_Time='"+ Value3+"' WHERE aerodrome_oaci_code='"+ FilterValue +"'", _deviceConn);
int RecordsAffected = _deviceCMD.ExecuteNonQuery();
The code executes fine, in fact the recordsaffected returns 1, but Nothing happend on database side. Another thing is, when i run the project on release mode, a copy of the SDF file is there, so, which of the sdf files the project is actually updating?, cause im querying both (the one in my project source path and the one copied to release folder) and both have the same data witout any modification.
My Copy to output directory setting is = Copy if newer.
If i try this with query analizer works just fine.
Any ideas?
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Oct 4, 2006
Hi,
I've noticed that after the first record from a ResultSet is deleted, HasRows property throws an exception like "The current row was deleted." Method ReadFirst() throws similar exception as well.
More details:
1. Create a ResultSet: ExecuteResultSet(ResultSetOptions.Updatable | ResultSetOptions.Scrollable | ResultSetOptions.Sensitive)
2. Let's say, there is no records in the resultset. Insert two new ones. Then call: ReadAbsolute(0); Delete(); HasRows; and the exception is thrown.
3. Then you can call ReadFirst() or Read with the same result.
4. Now call ReadAbsolute(0). It returns true. Call HasRows, ReadFirst() or Read() and you will get the exception each time.
I tried to explain this with the fact that Delete() doesn't change the current position of the ResultSet. But I don't see why that would mess the HasRows property or why after ReadAbsolute(0) retuns true, HasRows or ReadFirst() doesn't work.
Could anybody tell me what the problem is?
Thank you.
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May 23, 2007
Hi,
I am trying to develope a Pocket PC application using MS Visual Studio 2005 (C#)and the database is in the device (.sdf file).
Am trying to retreive a single row from a table containing around 10000 rows. I would like to know the fastest method to retreive the values.
whether it is faster to use an SQLDataAdapter to retreive the values to a dataset or datatable OR retreive the values to a SQLCEResultSet OR is there any other faster retreival method.
Please advice
Thanks,
Anujith
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Oct 3, 2006
Hi,
I've noticed that after the first record from a ResultSet is deleted, HasRows property throws an exception like "The current row was deleted." Method ReadFirst() throws similar exception as well.
More details:
1. Create a ResultSet: ExecuteResultSet(ResultSetOptions.Updatable | ResultSetOptions.Scrollable | ResultSetOptions.Sensitive)
2. Let's say, there is no records in the resultset. Insert two new ones. Then call: ReadAbsolute(0); Delete(); HasRows; and the exception is thrown.
3. Then you can call ReadFirst() or Read with the same result.
4. Now call ReadAbsolute(0). It returns true. Call HasRows, ReadFirst() or Read() and you will get the exception each time.
I tried to explain this with the fact that Delete() doesn't change the current position of the ResultSet. But I don't see why that would mess the HasRows property or why after ReadAbsolute(0) retuns true, HasRows or ReadFirst() doesn't work.
Could anybody tell me what the problem is?
Thank you.
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Jan 31, 2008
Hello,
I'm trying to develop a VB.NET (2005) form with just a ComBobox and a TextBox.
I bind a combobox with the SqlCeResultset (Scrollable | Updatable ). Do the same with the TextBox.
Combobox1.DataSource = rsResultSet
TextBox1.DataBindings.Add("Text", rsResultSet, "Obs")
This works (when I change the Combo item the textbox changes as well) but any changes to the textbox text do not reach the DB.If i change the Combobox item and back the old data is still there. If i look at the result
set it does appear as updateable.
How can I update the SqlCeResultset when I change the TextBox text?
Thanks
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Feb 26, 2008
i have result set from such query :
resultSetOptions = System.Data.SqlServerCe.ResultSetOptions.Scrollable | System.Data.SqlServerCe.ResultSetOptions.Updatable;
queryText =
SELECT agvb_id as ID
,agvb_cat_id as Category
,agv_brn_id as Brand
,agvb_brn_name as BrandName
,agv_brn_area as Area
,agv_brn_sku_qty as SkuQuantity
,agv_brn_qty as Quantity
,agv_orderliness as Orderliness
,agvb_importance as Importance
FROM AGENTS_VISITS_BRANDS
WHERE (AGENTS_VISITS_BRANDS.agvb_agv_id = @agv_id)
AND (AGENTS_VISITS_BRANDS.agvb_cat_id = @dad_id)
ORDER BY agvb_brn_name
if i open resultSet with such qury it looses its updatable option.
If i remove from where 1 param (no mater which) everything runs ok.
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Jan 15, 2007
Hi
I come from a MySQL background and have been having some trouble finding the MSSQL command that corresponds to MySQL's "describe." I Googled for around 1/2 hour but can't seem to find it.
Any help appreciated
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Jan 11, 2004
Hey,
I'm looking at creating a table in a stored procedure
[declare @tempTable table]
however, rather than then declaring the tables schema
[declare @tempTable table (pkField IDENTITY (1,1), SomeOtherField varchar(50), ...)]
I'd like it to simply use the schema of an already existing table (plus an additional column).
Is there a way to do this without having to manually write the table schema?
A simple example is:
I have a table
OriginalTable (idCol, NameCol, InfoCol)
I'd like to create a temp instance of that table called tempTable which would have a final schema of
tempTable (idCol, NameCol, InfoCol, myTempCol)
The reason I'd like to do this using the schema is so that I don't need to update all my procedures in the future when we decide to add some more detail to the originaltable which needs to be selected as well.
Thanks a lot for any help or direction you can provide.
-Ashleigh
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Mar 24, 2008
I have a group of TV listing data need to map into database tables.Data looks like following:http://www.oniva.com/upload/1356/crew.jpgI want to create a table for productionCrew of each TV programthe data is like -crew -programID -member-member-member ... etc-programID -member-member-member ... etc-programID -member-member-member ... etc... etcabove are data from productionCrew of all TV program, for eachprogramID we have a list of members.Should I merge all member into a big string?Or should I use 2 tables to store the Crew data?If i use 2 tables, how the fields / column will look like?
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Nov 14, 2007
Hi,
Inside a single transaction I'm inserting/updating multiple records into multiple tables, in this order:
table 1 record 1
table 2 record 1
table 3 record 1
table 1 record 2
table 2 record 1
table 1 record 3
table 2 record 3
table 3 record 3
Now I'm getting an unspecified error on a certain table:
Unspecified error [ 3,-1300704038,-1834095882,activitypointerBase,x lock (x blocks),PAG (idx): 1078 ]
From msdn I see that:
PAG (idx) means a lock on an index page.
x lock means an exclusive lock:
Indicates a data modification, such as an insert, an update, or a deletion. Ensures that multiple updates cannot be made to the same resource at the same time. (I assume that multiple updates within the SAME transaction can be made, only multiple updates from different transaction cannot be made, right?)
I cannot find any reference to this error message and don't know what the numbers mean. Maybe it relates to data that can be found in the sys.lock_information table like explained here, http://technet.microsoft.com/en-us/library/ms172932.aspx, but I'm not sure.
Furthermore, the sys.lock_information table is empty. I haven't been able to reproduce the problem myself. I only received an error log and the database to investigate it.
So, does anybody have an idea what this error message means and what I can do to troubleshoot this?
Thanks,
Jeffry
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Nov 6, 2007
I have an updateable and sensitive SqlCeResultSet that is bound to a DataGrid via a BindingSource. All updates to the resultset are programmatic. Changes to an existing record in the resultset are visible in the DataGrid and I am getting corresponding ListChanged events fired from the BindingSource. When I perform an database update independent of the resultset that changes resultset membership, I can peform a ReadLast and see the additional records; however the ListChanged event does not fire. Also, when I explicitly "create" a new record in the resultset I do not get a ListChanged event and in both cases the DataGrid does not display the records. Re-binding to the existing resultset does not appear to work either. Only when I create a new resultset and bind do the new or records display.
Using Compact Framework 2.0.
Any suggestions are appreciated.
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Aug 11, 2007
GO
CREATE TABLE [dbo].[CmnLanguage]( [Id] [char](2) NOT NULL CONSTRAINT PkCmnLanguage_Id PRIMARY KEY, [UniqueName] [varchar](26) NOT NULL, [NativeName] [nvarchar](26) NOT NULL, [DirectionType] [smallint] NOT NULL, [IsVisible] [bit] NOT NULL, [CreatedDateTime] [datetime] NOT NULL DEFAULT GETDATE(), [ModifiedDateTime] [datetime] NULL)
GO
CREATE TABLE [dbo].[CmnLink]( [Id] [int] IDENTITY(1,1) NOT NULL CONSTRAINT PkCmnLink_Id PRIMARY KEY, [UniqueName] [varchar](52) NOT NULL, [IsVisible] [bit] NOT NULL, [CreatedDateTime] [datetime] NOT NULL DEFAULT GETDATE(), [ModifiedDateTime] [datetime] NULL)
GO
CREATE TABLE [dbo].[CmnLinkCmnLanguage]( [LinkId] [int] NOT NULL CONSTRAINT FkCmnLinkCmnLanguage_LinkId FOREIGN KEY (LinkId) REFERENCES CmnLink(Id) ON DELETE CASCADE, [LanguageId] [char](2) NOT NULL CONSTRAINT FkCmnLinkCmnLanguage_LanguageId FOREIGN KEY (LanguageId) REFERENCES CmnLanguage(Id) ON UPDATE CASCADE ON DELETE CASCADE, [CreatedDateTime] [datetime] NOT NULL DEFAULT GETDATE(), [ModifiedDateTime] [datetime] NULL)
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Apr 27, 2006
I have a problem, in one of my db's I have a table tblpersons in schema web the rest of the table's in the db are in schema dbo. Now I removed the user web, but I want to change the schema of tblpersons from web.tblpersons to dbo.tblpersons. I created a stored procedure with the line " ALTER SCHEMA dbo TRANSFER web.tblpersons", when executing this I get an error that the table tblpersons couldn't be found.
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Sep 27, 2005
Hi all,
i m using sql server2005 CTP...i created a database called TEL and in that database i created a user(in security) as
USE [TEL]
GO
/****** Object: User [COLL_DB] Script Date: 09/27/2005 15:38:51 ******/
GO
CREATE USER [COLL_DB] FOR LOGIN [loginName] WITH DEFAULT_SCHEMA=[COLL_DB]
Now,when i m trying to create a table in the database TEL as
CREATE TABLE [COLL_DB].abc (c numeric)
commit;
it gives me error saying
The specified schema name "COLL_DB" either does not exist or you do not have permission to use it.
Now,can someone tell me...what i have to do to fix this error?????????
thanks...
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Jun 12, 2006
Hi Gurus,
I am looking for a script which lists me the differences between two table schemas.
Thanks in advance
Srini
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Aug 27, 2012
We currently have all tables in the dbo schema, but for organizational reason we would like to split them up in multiple schemas and I wonder if that can be done without re-creating the tables.
So my question is, is there a way to move a table into a different schema without re-creating it? (For those familiar with Postgres I'm looking for an equivalent to "ALTER TABLE foo SET SCHEMA newschema") sp_rename only allows a "one-part name" for the new name, so apparently that cannot be used.
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Dec 9, 2013
I have created a table on SQL Server from SAS. The table gets created fine. However, the table schema has my user ID in it (AD-ENTmyuserid.Table1). How can I change the schema to dbo.(dbo.Table1)? It's fine if I have to make this change in SQL Server Management Studio.
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Mar 15, 2014
I am more familiar with writing SQL for Oracle than MS SQL Server. Within Oracle there is a simple command, 'Describe', which actually shows the data types, and whether or not an attribute accepts NULLS. MS SQL Server does appear to support such a command, however I am looking for a way to describe the attributes of tables nonetheless.
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Jun 4, 2008
Hi,
I am a bit confused and wish to share this with you for help. We are designing a billing application to bill telephone calls. It currently handles a single rate plan. So what it does is that it looks up the RATES table and matches the called number area code with the RATES.ACCESS_Code field to find the tariff for that area and multiplies that by the number of minutes. Here is the current schema.
CALLS
•ID (pkid)
•Called Number
•Duration
RATES
•Destination Name
•Access_Code (pkid)
•Tariff
Now the problem is that we need to process calls based on RATES per OPERATOR. Each operator is a telephony carrier with similar RATES. However, each call will be prefixed with a number to indicate which operator carried that call. Accordingly, the database should relate that prefix with the proper operator and then looks up the RATES that are related to that operator.
In conclusion we will have a replica of the RATES table for multiple operators. An operator is only supposed to have two fields I guess (name and ID).
So now we need to re-engineer the schema to adapt to this situation.
Eg. 95004433313445 (Will be identified as BT operator)
93004422376234 (Will be identified as AT&T operator)
Can anyone help please?
PS: we are using SQL Express 2005
Thanks
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