Windows :: Case Sensitive Column Names In Data Reader

Nov 14, 2010

it seems that oracle data reader on some client machine is case sensitive. We are using oracle 10g. 2 client machines connect to the same DB and run the same code - one works and another doesn't. they are both using odac 2.111.7.20.

this is my .NET code (which works fine on every environment it was installed in the last 2 years):

using (OracleConnection sqlConn = new OracleConnection())
{
sqlConn.ConnectionString = connectionString;
using (OracleCommand sqlCmd = new OracleCommand())
{
sqlCmd.CommandType = CommandType.StoredProcedure;
sqlCmd.CommandText = "getValues";
[code].......

this is the oracle procedure:

PROCEDURE getValues(
rc IN OUT sys_refcursor
)
IS
BEGIN
OPEN rc FOR
SELECT Name, Value FROM MySchema.MyTable;
END;

The problem that we saw was that on one of the client machines dr["Name"] threw exception :

Error Source: Oracle.DataAccess.Client.OracleDataReader.GetOrdinal
Error Message: System.IndexOutOfRangeException: Unable to find specified column in result set
at Oracle.DataAccess.Client.OracleDataReader.GetOrdinal(String name)
at Oracle.DataAccess.Client.OracleDataReader.get_Item(String columnName)

We modified the code and used NAME instead of Name and it worked!! (dr["NAME"] instead of dr["Name"])

How can it be? from oracle documentation:
A case-sensitive search is made to locate the specified column by its name. If this fails, then a case-insensitive search is made.

My question is what can cause such a behavior? Some ODAC/ODP definitions, .NET configuration?

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