最も簡単な方法は、バインド変数を使用することです。基本的な例は次のとおりです。
CREATE TABLE clob_table (val CLOB);
void Main()
{
using (var connection = new OracleConnection("DATA SOURCE=hq_pdb_tcp;PASSWORD=oracle;USER ID=HUSQVIK"))
{
using (var transaction = new TransactionScope())
{
connection.Open();
using (var command = connection.CreateCommand())
{
command.CommandText = "INSERT INTO clob_table (val) VALUES (EMPTY_CLOB()) RETURNING val INTO :clob";
var parameter = command.Parameters.Add("clob", OracleDbType.Clob, ParameterDirection.Output);
command.ExecuteNonQuery();
var clob = (OracleClob)parameter.Value;
ChunkFile(@"LargeTextFile.txt", 8060, (b, l) => clob.Append(b, 0, l));
}
transaction.Complete();
}
}
}
private void ChunkFile(string fileName, int chunkSize, Action<char[], int> chunkAction)
{
using (var stream = File.OpenText(fileName))
{
do
{
var buffer = new char[chunkSize];
var length = stream.Read(buffer, 0, chunkSize);
if (length == 0)
return;
chunkAction(buffer, length);
}
while (true);
}
}