// Add Data Conversion transform if the pair is unicode/non-unicode combination.
// It can be extended to other combination.
private static bool NeedConvert(wrapper.DataType srcType, wrapper.DataType destType)
{
if (srcType != destType)
{
if ((srcType == wrapper.DataType.DT_STR || srcType == wrapper.DataType.DT_TEXT) &&
(destType == wrapper.DataType.DT_WSTR || destType == wrapper.DataType.DT_NTEXT))
{
return(true);
}
if ((destType == wrapper.DataType.DT_STR || destType == wrapper.DataType.DT_TEXT) &&
(srcType == wrapper.DataType.DT_WSTR || srcType == wrapper.DataType.DT_NTEXT))
{
return(true);
}
}
return(false);
}
public override void SetOutputColumnDataTypeProperties(int outputID, int outputColumnID, Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType dataType, int length, int precision, int scale, int codePage)
{
IDTSOutputCollection100 outputColl = this.ComponentMetaData.OutputCollection;
IDTSOutput100 output = outputColl.GetObjectByID(outputID);
IDTSOutputColumnCollection100 columnColl = output.OutputColumnCollection;
IDTSOutputColumn100 column = columnColl.GetObjectByID(outputColumnID);
column.SetDataTypeProperties(dataType, length, precision, scale, codePage);
}
/// <summary>
/// Sets the data type properties of an Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSOutputColumn100
/// object.
/// </summary>
/// <param name="iOutputID">The ID of the Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSOutput100 object.</param>
/// <param name="iOutputColumnID">The ID of the Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSOutputColumn100 object.</param>
/// <param name="eDataType">The Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType of the column.</param>
/// <param name="iLength">The length of the column.</param>
/// <param name="iPrecision">The total number of digits in the column.</param>
/// <param name="iScale">The number of digits of precision in the column.</param>
/// <param name="iCodePage">The code page of the column.</param>
public override void SetOutputColumnDataTypeProperties(int iOutputID, int iOutputColumnID, Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType eDataType, int iLength, int iPrecision, int iScale, int iCodePage)
{
var output = ComponentMetaData.OutputCollection.FindObjectByID(iOutputID);
var outColumn = output.OutputColumnCollection.GetObjectByID(iOutputColumnID);
outColumn.SetDataTypeProperties(eDataType, iLength, iPrecision, iScale, iCodePage);
}
private static String ConvertColumnTypeToSqlServer(wrapper.DataType dataType)
{
String resultString = String.Empty;
switch (dataType)
{
case wrapper.DataType.DT_BOOL:
resultString = "BIT";
break;
case wrapper.DataType.DT_BYTES:
resultString = "BINARY";
break;
case wrapper.DataType.DT_CY:
resultString = "MONEY";
break;
case wrapper.DataType.DT_DATE:
resultString = "DATETIME";
break;
case wrapper.DataType.DT_DBDATE:
resultString = "DATE";
break;
case wrapper.DataType.DT_DBTIME:
resultString = "TIME";
break;
case wrapper.DataType.DT_DBTIME2:
resultString = "TIME";
break;
case wrapper.DataType.DT_DBTIMESTAMP:
resultString = "DATETIME";
break;
case wrapper.DataType.DT_DBTIMESTAMP2:
resultString = "DATETIME2";
break;
case wrapper.DataType.DT_DBTIMESTAMPOFFSET:
resultString = "DATETIMEOFFSET";
break;
case wrapper.DataType.DT_DECIMAL:
resultString = "DECIMAL";
break;
case wrapper.DataType.DT_FILETIME:
resultString = "DATETIME";
break;
case wrapper.DataType.DT_GUID:
resultString = "UNIQUEIDENTIFIER";
break;
case wrapper.DataType.DT_I1:
resultString = "SMALLINT";
break;
case wrapper.DataType.DT_I2:
resultString = "SMALLINT";
break;
case wrapper.DataType.DT_I4:
resultString = "INT";
break;
case wrapper.DataType.DT_I8:
resultString = "BIGINT";
break;
case wrapper.DataType.DT_IMAGE:
resultString = "IMAGE";
break;
case wrapper.DataType.DT_NTEXT:
resultString = "NTEXT";
break;
case wrapper.DataType.DT_WSTR:
resultString = "NVARCHAR";
break;
case wrapper.DataType.DT_NUMERIC:
resultString = "NUMERIC";
break;
case wrapper.DataType.DT_R4:
resultString = "REAL";
break;
case wrapper.DataType.DT_R8:
resultString = "FLOAT";
break;
case wrapper.DataType.DT_STR:
resultString = "VARCHAR";
break;
case wrapper.DataType.DT_TEXT:
resultString = "TEXT";
break;
case wrapper.DataType.DT_UI1:
resultString = "TINYINT";
break;
case wrapper.DataType.DT_UI2:
resultString = "INT";
break;
case wrapper.DataType.DT_UI4:
resultString = "BIGINT";
break;
case wrapper.DataType.DT_UI8:
// SQL Server's BIGINT cannot hold UI8, so we are using NUMERIC here.
resultString = "NUMERIC (20, 0)";
break;
}
return(resultString);
}
/// <summary>
/// Allow the user to change a String to a NText, although this may affect performance.
/// </summary>
/// <param name="outputID"></param>
/// <param name="outputColumnID"></param>
/// <param name="dataType"></param>
/// <param name="length"></param>
/// <param name="precision"></param>
/// <param name="scale"></param>
/// <param name="codePage"></param>
public override void SetOutputColumnDataTypeProperties(int outputID, int outputColumnID, Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType dataType, int length, int precision, int scale, int codePage)
{
var outputColl = this.ComponentMetaData.OutputCollection;
IDTSOutput output = outputColl.GetObjectByID(outputID);
var columnColl = output.OutputColumnCollection;
IDTSOutputColumn column = columnColl.GetObjectByID(outputColumnID);
var sourceColl = output.ExternalMetadataColumnCollection;
IDTSExternalMetadataColumn columnSource = sourceColl.GetObjectByID(column.ExternalMetadataColumnID);
if (((column.DataType == DataType.DT_WSTR) || (column.DataType == DataType.DT_NTEXT)) &&
((dataType == DataType.DT_NTEXT) || (dataType == DataType.DT_WSTR)))
{
column.SetDataTypeProperties(dataType, length, precision, scale, codePage);
}
else
{
base.SetOutputColumnDataTypeProperties(outputID, outputColumnID, dataType, length, precision, scale, codePage);
}
}
