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• #17 lakisoft veterán

  2012-12-11 12:44:41 #17

  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

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  lakisoft

  veterán

  – Create XLS script DAL – 04/24/2003
  –
  – Designed for Agent scheduling, turn on “Append output for step history”
  –
  – Search for %%% to find adjustable constants and other options
  –
  – Uses OLE for ADO and OLE DB to create the XLS file if it does not exist
  – Linked server requires the XLS to exist before creation
  – Uses OLE ADO to Create the XLS Worksheet for use as a table by T-SQL
  – Uses Linked Server to allow T-SQL access to XLS table
  – Uses T-SQL to populate te XLS worksheet, very fast
  –
  PRINT ‘Begin CreateXLS script at ‘+RTRIM(CONVERT(varchar(24),GETDATE(),121))+’ ‘
  PRINT ”
  GO
  
  SET NOCOUNT ON
  DECLARE @Conn int — ADO Connection object to create XLS
  , @hr int — OLE return value
  , @src varchar(255) — OLE Error Source
  , @desc varchar(255) — OLE Error Description
  , @Path varchar(255) — Drive or UNC path for XLS
  , @Connect varchar(255) — OLE DB Connection string for Jet 4 Excel ISAM
  , @WKS_Created bit — Whether the XLS Worksheet exists
  , @WKS_Name varchar(128) — Name of the XLS Worksheet (table)
  , @ServerName nvarchar(128) — Linked Server name for XLS
  , @DDL varchar(8000) — Jet4 DDL for the XLS WKS table creation
  , @SQL varchar(8000) — INSERT INTO XLS T-SQL
  , @Recs int — Number of records added to XLS
  , @Log bit — Whether to log process detail
  
  – Init variables
  SELECT @Recs = 0
  – %%% 1 = Verbose output detail, helps find problems, 0 = minimal output detail
  , @Log = 1
  – %%% assign the UNC or path and name for the XLS file, requires Read/Write access
  – must be accessable from server via SQL Server service account
  – & SQL Server Agent service account, if scheduled
  SET @Path = ‘C:\TEMP\Test_’+CONVERT(varchar(10),GETDATE(),112)+’.xls’
  – assign the ADO connection string for the XLS creation
  SET @Connect = ‘Provider=Microsoft.Jet.OLEDB.4.0;Data Source=’+@Path+’;Extended Properties=Excel 8.0′
  – %%% assign the Linked Server name for the XLS population
  SET @ServerName = ‘EXCEL_TEST’
  – %%% Rename Table as required, this will also be the XLS Worksheet name
  SET @WKS_Name = ‘People’
  – %%% Table creation DDL, uses Jet4 syntax,
  – Text data type = varchar(255) when accessed from T-SQL
  SET @DDL = ‘CREATE TABLE ‘+@WKS_Name+’ (SSN Text, Name Text, Phone Text)’
  – %%% T-SQL for table population, note the 4 part naming required by Jet4 OLE DB
  – INSERT INTO SELECT, INSERT INTO VALUES, and EXEC sp types are supported
  – Linked Server does not support SELECT INTO types
  SET @SQL = ‘INSERT INTO ‘+@ServerName+’…’+@WKS_Name+’ (SSN, Name, Phone) ‘
  SET @SQL = @SQL+’SELECT au_id AS SSN’
  SET @SQL = @SQL+’, LTRIM(RTRIM(ISNULL(au_fname,””)+” ”+ISNULL(au_lname,””))) AS Name’
  SET @SQL = @SQL+’, phone AS Phone ‘
  SET @SQL = @SQL+’FROM pubs.dbo.authors’
  
  IF @Log = 1 PRINT ‘Created OLE ADODB.Connection object’
  – Create the Conn object
  EXEC @hr = sp_OACreate ‘ADODB.Connection’, @Conn OUT
  IF @hr <> 0 — have to use <> as OLE / ADO can return negative error numbers
  BEGIN
  – Return OLE error
  EXEC sp_OAGetErrorInfo @Conn, @src OUT, @desc OUT
  SELECT Error=convert(varbinary(4),@hr), Source=@src, Description=@desc
  RETURN
  END
  
  IF @Log = 1 PRINT char(9)+’Assigned ConnectionString property’
  – Set a the Conn object’s ConnectionString property
  – Work-around for error using a variable parameter on the Open method
  EXEC @hr = sp_OASetProperty @Conn, ‘ConnectionString’, @Connect
  IF @hr <> 0
  BEGIN
  – Return OLE error
  EXEC sp_OAGetErrorInfo @Conn, @src OUT, @desc OUT
  SELECT Error=convert(varbinary(4),@hr), Source=@src, Description=@desc
  RETURN
  END
  
  IF @Log = 1 PRINT char(9)+’Open Connection to XLS, for file Create or Append’
  – Call the Open method to create the XLS if it does not exist, can’t use parameters
  EXEC @hr = sp_OAMethod @Conn, ‘Open’
  IF @hr <> 0
  BEGIN
  – Return OLE error
  EXEC sp_OAGetErrorInfo @Conn, @src OUT, @desc OUT
  SELECT Error=convert(varbinary(4),@hr), Source=@src, Description=@desc
  RETURN
  END
  
  – %%% This section could be repeated for multiple Worksheets (Tables)
  IF @Log = 1 PRINT char(9)+’Execute DDL to create ”’+@WKS_Name+”’ worksheet’
  – Call the Execute method to Create the work sheet with the @WKS_Name caption,
  – which is also used as a Table reference in T-SQL
  – Neat way to define column data types in Excel worksheet
  – Sometimes converting to text is the only work-around for Excel’s General
  – Cell formatting, even though the Cell contains Text, Excel tries to format
  – it in a “Smart” way, I have even had to use the single quote appended as the
  – 1st character in T-SQL to force Excel to leave it alone
  EXEC @hr = sp_OAMethod @Conn, ‘Execute’, NULL, @DDL, NULL, 129 — adCmdText + adExecuteNoRecords
  – 0x80040E14 for table exists in ADO
  IF @hr = 0x80040E14
  – kludge, skip 0×80042732 for ADO Optional parameters (NULL) in SQL7
  OR @hr = 0×80042732
  BEGIN
  – Trap these OLE Errors
  IF @hr = 0x80040E14
  BEGIN
  PRINT char(9)+””+@WKS_Name+”’ Worksheet exists for append’
  SET @WKS_Created = 0
  END
  SET @hr = 0 — ignore these errors
  END
  IF @hr <> 0
  BEGIN
  – Return OLE error
  EXEC sp_OAGetErrorInfo @Conn, @src OUT, @desc OUT
  SELECT Error=convert(varbinary(4),@hr), Source=@src, Description=@desc
  RETURN
  END
  
  IF @Log = 1 PRINT ‘Destroyed OLE ADODB.Connection object’
  – Destroy the Conn object, +++ important to not leak memory +++
  EXEC @hr = sp_OADestroy @Conn
  IF @hr <> 0
  BEGIN
  – Return OLE error
  EXEC sp_OAGetErrorInfo @Conn, @src OUT, @desc OUT
  SELECT Error=convert(varbinary(4),@hr), Source=@src, Description=@desc
  RETURN
  END
  
  – Linked Server allows T-SQL to access the XLS worksheet (Table)
  – This must be performed after the ADO stuff as the XLS must exist
  – and contain the schema for the table, or worksheet
  IF NOT EXISTS(SELECT srvname from master.dbo.sysservers where srvname = @ServerName)
  BEGIN
  IF @Log = 1 PRINT ‘Created Linked Server ”’+@ServerName+”’ and Login’
  EXEC sp_addlinkedserver @server = @ServerName
  , @srvproduct = ‘Microsoft Excel Workbook’
  , @provider = ‘Microsoft.Jet.OLEDB.4.0′
  , @datasrc = @Path
  , @provstr = ‘Excel 8.0′
  – no login name or password are required to connect to the Jet4 ISAM linked server
  EXEC sp_addlinkedsrvlogin @ServerName, ‘false’
  END
  
  – Have to EXEC the SQL, otherwise the SQL is evaluated
  – for the linked server before it exists
  EXEC (@SQL)
  PRINT char(9)+’Populated ”’+@WKS_Name+”’ table with ‘+CONVERT(varchar,@@ROWCOUNT)+’ Rows’
  
  – %%% Optional you may leave the Linked Server for other XLS operations
  – Remember that the Linked Server will not create the XLS, so remove it
  – When you are done with it, especially if you delete or move the file
  IF EXISTS(SELECT srvname from master.dbo.sysservers where srvname = @ServerName)
  BEGIN
  IF @Log = 1 PRINT ‘Deleted Linked Server ”’+@ServerName+”’ and Login’
  EXEC sp_dropserver @ServerName, ‘droplogins’
  END
  GO
  
  SET NOCOUNT OFF
  PRINT ”
  PRINT ‘Finished CreateXLS script at ‘+RTRIM(CONVERT(varchar(24),GETDATE(),121))+’ ‘
  GO

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