Dan Gentry Dan Gentry - 5 months ago 18
PowerShell Question

OLEDB truncating Oracle LONG datatype to 100 characters

I think I know the solution to this but I'd like to get a second opinion.

I have a function called Get-Data that retrieves and returns a DataTable from an Oracle database. Now, due to Powershell being SUPER helpful, when only one record is returned from Oracle the function returns a DataRow instead of a DataTable.

When this happens and one of the columns is a LONG DataType, the field is truncated to 100 characters.

The Obvious Solution is to Return , $dt and modify my code to handle that. However, as I said, I wanted a second opinion.


function Get-Data
#Open the connection to the DB if closed
if($Conn.state -eq 'Closed')

#Create objects for querying the DB
$readcmd = New-Object system.Data.OleDb.OleDbCommand($sql,$Conn)
$readcmd.CommandTimeout = '300'
$da = New-Object system.Data.OleDb.OleDbDataAdapter($readcmd)
$dt = New-Object system.Data.datatable

#Query the DB and fill the DataTabe with records


return $dt


Okay, so I found the source of the problem.

When utilizing this sql statement to select from a table with a LONG datatype:

Select * from [table]

OLEDB returns the full contents of the LONG field from ORACLE

When utilizing the following query instead for the same table:

Select distinct * from [table]

OLEDB returns only the first 100 characters of the LONG field