SQL Server

Split File into Chunks

Demonstrates how to split a file into chunks. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    DECLARE @fac int
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Any type of file may be split.  It doesn't matter if it's
    -- a binary file or a text file.
    DECLARE @fileToSplit nvarchar(4000)
    SELECT @fileToSplit = 'qa_data/hamlet.xml'

    DECLARE @partPrefix nvarchar(4000)
    SELECT @partPrefix = 'hamlet'
    DECLARE @partExtension nvarchar(4000)
    SELECT @partExtension = 'part'
    DECLARE @maxChunkSize int
    SELECT @maxChunkSize = 50000
    DECLARE @destDirPath nvarchar(4000)
    SELECT @destDirPath = 'qa_output'

    -- Splits hamlet.xml into hamlet1.part, hamlet2.part, ...
    -- Output files are written to the current working directory.
    -- Each chunk will be 50000 bytes except for the last which
    -- will be the remainder.
    EXEC sp_OAMethod @fac, 'SplitFile', @success OUT, @fileToSplit, @partPrefix, @partExtension, @maxChunkSize, @destDirPath

    IF @success = 1
      BEGIN

        PRINT 'Success.'
      END
    ELSE
      BEGIN
        EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END

    EXEC @hr = sp_OADestroy @fac


END
GO