static async Task Main(string[] args)
{
try
{
EntityFrameworkProfiler.Initialize();
var config = Devart.Data.Oracle.Entity.Configuration.OracleEntityProviderConfig.Instance;
config.CodeFirstOptions.UseNonUnicodeStrings = true;
config.CodeFirstOptions.UseNonLobStrings = true;
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.development.json", optional: false, reloadOnChange: true);
var configuration = builder.Build();
EntityContext.ConnectionString = ComposeConnectionString(configuration);
using (var scope = new TransactionScope(
TransactionScopeOption.Required,
new TransactionOptions {
IsolationLevel = IsolationLevel.ReadCommitted
},
TransactionScopeAsyncFlowOption.Enabled))
{
using (var context = new EntityContext())
{
context.Database.EnsureDeleted();
context.Database.ExecuteSqlRaw(@"
CREATE TABLE BEAST_RIDER
(
ID NUMBER (19, 0) GENERATED ALWAYS AS IDENTITY NOT NULL,
NAME VARCHAR2 (50 CHAR) NOT NULL,
DISCRIMINATOR VARCHAR2 (50 CHAR) NOT NULL
)");
await context.SaveChangesAsync();
}
scope.Complete();
}
using (var context = new EntityContext())
{
// Both methods of querying derived entities generate
// ... WHERE "b".DISCRIMINATOR = TO_NCLOB('BirdRider')
// resulting in 'ORA-00932: inconsistent datatypes: expected - got NCLOB'
var birdRider = context
.Set <BirdRider>()
.FirstOrDefault();
var beastRider = context
.Set <BeastRider>()
.FirstOrDefault(_ => _ is BirdRider);
}
Console.WriteLine("Finished.");
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
Console.ReadKey();
}
