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It supports many different flavors of the. T echnically speaking, FreeTDS is an open source implementation of the TDS (Tabular Data Stream) protocol used by these databases for their own clients. "Oracle Net is analogous to the SQL Server Tabular Data Stream (TDS) transport facility. F reeTDS is a set of libraries for Unix and Linux that allows your programs to natively talk to Microsoft SQL Server and Sybase databases.
#TABULAR DATA STREAM SOFTWARE#
Oracle Corporation provides Oracle Net - software analogous to TDS. WireShark has a protocol decoder for TDS.
#TABULAR DATA STREAM FREE#
The FreeTDS team has developed a free native-library implementation of the TDS protocol, licensed under the LGPL license. This situation changed when Microsoft published the TDS specification in 2008, as part of the Open Specification Promise. The exception was TDS 5.0, used exclusively by Sybase, for which documentation is available from Sybase. The TDS protocol comes in several varieties, most of which had not been openly documented because they were regarded as proprietary technology. db-lib, though officially deprecated, remains in widespread use. (Microsoft has since added additional APIs.) At about the same time, Sybase introduced a more powerful successor to db-lib, called ct-lib, and called the pair Open Client. Microsoft kept the db-lib API and added ODBC. In 1990 Sybase entered into a technology-sharing agreement with Microsoft which resulted in Microsoft marketing its own SQL Server - Microsoft SQL Server - based on Sybase's code.
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blk provides, like db-lib, an API to the client programs and communicates with the server via netlib. db-lib sends to the server a structured stream of bytes meant for tables of data, hence a Tabular Data Stream. While netlib's job is to ferry data between the two computers through the underlying network protocol, db-lib provides an API to the client program, and communicates with the server via netlib. A further library was included in order to implement "Bulk Copy" called blk. In order to encourage the use of its products, Sybase promoted the use of a flexible pair of libraries, called netlib and db-lib, to implement standard SQL. The MARS TDS header contained errorsĪt .OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)Īt .ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)Īt .TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)Īt .Tr圜onsumeMetaData()Īt .get_MetaData()Īt .FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)Īt .RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)Īt .ExecuteReader(CommandBehavior behavior)Īt .RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues)Īt .RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)Īt .QueryingEnumerable`1.Enumerator.BufferlessMoveNext(DbContext _, Boolean buffer)Īt .(TState state, Func`3 operation, Func`3 verifySucceeded)Īt .QueryingEnumerable`1.Enumerator.MoveNext()Īt (IEnumerable`1 source)Īt .LinqOperatorProvider.ResultEnumerable`1.GetEnumerator()Īt .LinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext()Īt (IEnumerable`1 source, Boolean& found)Īt (IEnumerable`1 source)Īt .Quer圜ompiler.c_Displa圜lass15_1`1.During the early development of Sybase SQL Server, the developers at Sybase perceived the lack of a commonly accepted application level protocol to transfer data between a database server and its client. Exception message: The incoming tabular data stream (TDS) protocol stream is incorrect.