11G .net core 3.1 beta | linq query exception when relating classes

I was unable to reopen and I’m unsure if you get notifications so opening a new one for 11G. Apologies if I’m doing this wrong.

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - Production PL/SQL Release 11.2.0.4.0 - Production CORE 11.2.0.4.0 Production TNS for Linux: Version 11.2.0.4.0 - Production NLSRTL Version 11.2.0.4.0 - Production

` public class DaleContext : DbContext { public DaleContext() { ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking; }

public DaleContext(DbContextOptions options) : base(options)
{
  ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
}

public DaleContext(DbContextOptions<SecurityContext> options) : base(options)
{
  ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
}
public DbSet<BookingBlock> BookingBlocks { get; set; }
public DbSet<CustomerGroup> CustomerGroups { get; set; }

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
  //leaving this for now to use for direct db integration/validation in unit test
  if (!optionsBuilder.IsConfigured)
  {
    //if this does remain, then pull data source string from json file where it's NOT stored in git
    optionsBuilder
      .UseLoggerFactory(ConsoleLoggerFactory)
      .UseOracle("Data Source = xxxx;"
      , b => b.UseOracleSQLCompatibility("11"));
  }
}

public static readonly ILoggerFactory ConsoleLoggerFactory =
  LoggerFactory.Create(builder =>
  {
    builder.AddFilter((category, level) =>
      category == DbLoggerCategory.Database.Command.Name && level == LogLevel.Information).AddConsole();
  });

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
  modelBuilder.Entity<BookingBlock>().ToTable("PDF_BOOKING_BLOCK");
  modelBuilder.Entity<BookingLimit>().ToTable("PDF_BOOKING_LIMIT");
  modelBuilder.Entity<CustomerGroup>().ToTable("PDF_CUST_GROUP");

  //one to many
  modelBuilder.Entity<CustomerGroup>().HasMany(cg => cg.BookingBlocks).WithOne(bb => bb.CustomerGroup);

  //tables w/ composite keys
  modelBuilder.Entity<BookingBlock>()
      .HasKey(pk => new { pk.RPTNG_FLOW_PATH_ID, pk.CUST_GROUP_IDFTN });

}`

public class CustomerGroup { public CustomerGroup() { BookingBlocks = new List<BookingBlock>(); } [Key] public int CUST_GROUP_IDFTN { get; set; } public string CUST_GROUP_NAME { get; set; } public string CUST_GROUP_DESC { get; set; } public string ENABLED_INDIC { get; set; } public string LAST_CHNGD_IDFTN { get; set; } public DateTime DATE_CRTD { get; set; } public DateTime DATE_LAST_CHNGD { get; set; } public List<BookingBlock> BookingBlocks { get; set; } }

public class BookingBlock { public int RPTNG_FLOW_PATH_ID { get; set; } public int CUST_GROUP_IDFTN { get; set; } public int BLOCK_MIN_LEAD_TIME { get; set; } public int BLOCK_BKNG_WEEKS { get; set; } public string ENABLED_INDIC { get; set; } public int SORT_SEQ { get; set; } public string LAST_CHNGD_IDFTN { get; set; } public DateTime DATE_CRTD { get; set; } public DateTime DATE_LAST_CHNGD { get; set; } public CustomerGroup CustomerGroup { get; set; } }

1st test method

This test method used to work but after upgrade to 11G, it no longer does a simple count: NOTE: When I comment out the fluent relationship and the CustomerGroup property from BookBlock, then the first test method works. [TestMethod] public void GetBookBlockCountExample() { using (var context = new DaleContext()) { var bookingBlocks = context.BookingBlocks.ToList(); Console.WriteLine($"count {bookingBlocks.Count}"); } }

Exception for 1st test method

Message: Test method Arconic.UnitTest.Core.DaleUnitTest.GetBookBlockCountExample threw exception: Oracle.ManagedDataAccess.Client.OracleException: ORA-00904: “p”.“CustomerGroupCUST_GROUP_IDFTN”: invalid identifier Stack Trace: OracleConnectionImpl.VerifyExecution(Int32& cursorId, Boolean bThrowArrayBindRelatedErrors, SqlStatementType sqlStatementType, Int32 arrayBindCount, OracleException& exceptionForArrayBindDML, Boolean& hasMoreRowsInDB, Boolean bFirstIterationDone) OracleCommandImpl.ExecuteReader(String commandText, OracleParameterCollection paramColl, CommandType commandType, OracleConnectionImpl connectionImpl, OracleDataReaderImpl& rdrImpl, Int32 longFetchSize, Int64 clientInitialLOBFS, OracleDependencyImpl orclDependencyImpl, Int64[] scnForExecution, Int64[]& scnFromExecution, OracleParameterCollection& bindByPositionParamColl, Boolean& bBindParamPresent, Int64& internalInitialLOBFS, OracleException& exceptionForArrayBindDML, OracleConnection connection, OracleLogicalTransaction& oracleLogicalTransaction, IEnumerable1 adrianParsedStmt, Boolean isDescribeOnly, Boolean isFromEF) OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior) OracleCommand.ExecuteDbDataReader(CommandBehavior behavior) DbCommand.ExecuteReader() OracleRelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject) Enumerator.InitializeReader(DbContext _, Boolean result) OracleExecutionStrategy.Execute[TState,TResult](TState state, Func3 operation, Func3 verifySucceeded) Enumerator.MoveNext() List1.ctor(IEnumerable1 collection) Enumerable.ToList[TSource](IEnumerable1 source) DaleUnitTest.GetBookBlockCountExample() line 29

This is the test method I used w/ 10G and it responds the same in 11G. Could it be the composite key of the child class BookBlock?

2nd test method

[TestMethod] public void Get_AmCastleCompany_FlowPath_27NFT_BookingWeeks() { //relationships not working in 10G because ODP using (var context = new DaleContext()) { var customer = context.CustomerGroups.Where(cg => cg.CUST_GROUP_IDFTN == 275 && cg.BookingBlocks.FirstOrDefault().RPTNG_FLOW_PATH_ID == 2).ToList(); Assert.AreEqual(1, customer.Count); } }

The exception for 2nd test method:

Message: Test method Arconic.UnitTest.Core.DaleUnitTest.Get_AmCastleCompany_FlowPath_27NFT_BookingWeeks threw exception: Oracle.ManagedDataAccess.Client.OracleException: ORA-00904: “p0”.“CustomerGroupCUST_GROUP_IDFTN”: invalid identifier Stack Trace: OracleConnectionImpl.VerifyExecution(Int32& cursorId, Boolean bThrowArrayBindRelatedErrors, SqlStatementType sqlStatementType, Int32 arrayBindCount, OracleException& exceptionForArrayBindDML, Boolean& hasMoreRowsInDB, Boolean bFirstIterationDone) OracleCommandImpl.ExecuteReader(String commandText, OracleParameterCollection paramColl, CommandType commandType, OracleConnectionImpl connectionImpl, OracleDataReaderImpl& rdrImpl, Int32 longFetchSize, Int64 clientInitialLOBFS, OracleDependencyImpl orclDependencyImpl, Int64[] scnForExecution, Int64[]& scnFromExecution, OracleParameterCollection& bindByPositionParamColl, Boolean& bBindParamPresent, Int64& internalInitialLOBFS, OracleException& exceptionForArrayBindDML, OracleConnection connection, OracleLogicalTransaction& oracleLogicalTransaction, IEnumerable1 adrianParsedStmt, Boolean isDescribeOnly, Boolean isFromEF) OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior) OracleCommand.ExecuteDbDataReader(CommandBehavior behavior) DbCommand.ExecuteReader() OracleRelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject) Enumerator.InitializeReader(DbContext _, Boolean result) OracleExecutionStrategy.Execute[TState,TResult](TState state, Func3 operation, Func3 verifySucceeded) Enumerator.MoveNext() List1.ctor(IEnumerable1 collection) Enumerable.ToList[TSource](IEnumerable1 source) DaleUnitTest.Get_AmCastleCompany_FlowPath_27NFT_BookingWeeks() line 62

[alexkeh]

I reproduced the problem and found a solution.

In OnModelCreating, add the following line: modelBuilder.HasAnnotation("Relational:MaxIdentifierLength", 30);

Oracle DBs prior to version 12.2 have a 30 character limit on object names, which includes quotes. Quotes are appended to the EF Core object names, which put your 29 character object over the limit.

Once I set the MaxIdentifierLength property to 30, I was able to create your schema objects and execute the test you provided.

[alexkeh]

I got your test case working against a 19c DB without the error. I’ll get a hold of 11g test DB tomorrow and try it out.