Problem with the new table locking feature
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Key: DNET-341
URL: http://tracker.firebirdsql.org/browse/DNET-341
Project: .NET Data provider
Issue Type: Bug
Components: Weekly Builds
Reporter: Marc Bettex
Assignee: Jiri Cincura
There is a problem with the new locking table feature introduced in the weekly
builds. When calling the FbConnection.GetSchema(...) method I got the following
exception
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbTransaction.cs(474,
26) : FirebirdSql.Data.Common.TransactionParameterBuffer
BuildTpb(FirebirdSql.Data.FirebirdClient.FbTransactionOptions)
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbTransaction.cs(437,
13) : FirebirdSql.Data.Common.TransactionParameterBuffer BuildTpb()
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbTransaction.cs(363,
21) : Void BeginTransaction()
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs(1153,
21) : Void Prepare(Boolean)
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs(1215,
13) : Void ExecuteCommand(System.Data.CommandBehavior, Boolean)
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs(559,
6) : FirebirdSql.Data.FirebirdClient.FbDataReader
ExecuteReader(System.Data.CommandBehavior)
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs(659,
13) : System.Data.Common.DbDataReader
ExecuteDbDataReader(System.Data.CommandBehavior)
System.Data.IDataReader
System.Data.IDbCommand.ExecuteReader(System.Data.CommandBehavior)
Int32 FillInternal(System.Data.DataSet, System.Data.DataTable[], Int32, Int32,
System.String, System.Data.IDbCommand, System.Data.CommandBehavior)
Int32 Fill(System.Data.DataTable[], Int32, Int32, System.Data.IDbCommand,
System.Data.CommandBehavior)
Int32 Fill(System.Data.DataTable)
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\Schema\FbSchema.cs(57,
17) : System.Data.DataTable
GetSchema(FirebirdSql.Data.FirebirdClient.FbConnection, System.String,
System.String[])
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\Schema\FbSchemaFactory.cs(210,
13) : System.Data.DataTable
PrepareCollection(FirebirdSql.Data.FirebirdClient.FbConnection, System.String,
System.String[])
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\Schema\FbSchemaFactory.cs(79,
21) : System.Data.DataTable
GetSchema(FirebirdSql.Data.FirebirdClient.FbConnection, System.String,
System.String[])
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbConnectionInternal.cs(406,
13) : System.Data.DataTable GetSchema(System.String, System.String[])
C:\Users\bettex\Documents\Marc\Projects\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbConnection.cs(468,
13) : System.Data.DataTable GetSchema(System.String, System.String[])
The dictionnary holding the parameters for the table locking was never set, to
it is null, and the foreach in FbTransation at line 474 throws a
NullReferenceException. I have fixed it on my machine by adding a constructor
to FbTransactionOptions that assignes an empty dictionnary to
FbTransactionOptions.LockTables.
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