Microsoft.Data.Sqlite and CommandBehavior.SingleResult throws exception

[AdamDotNet]

See https://github.com/StackExchange/dapper-dot-net/blob/master/Dapper/SqlMapper.Async.cs#L210

NuGets:
Microsoft.Data.Sqlite 1.0.0-rc1-final
Microsoft.Extensions.PlatformAbstractions 1.0.0-rc1-final

dapper-dot-net master branch

I am trying to retrieve a list of entries from a table.

columnMaps = (await connection.QueryAsync<ColumnMap>("SELECT column_id, column_name, ordinal, data_type, variable_type FROM column_map ORDER BY ordinal;").ConfigureAwait(false)).ToList();

This exception is thrown.
at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior behavior)
at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)
at Microsoft.Data.Sqlite.SqliteCommand.d__52.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable1.ConfiguredTaskAwaiter.GetResult() at Dapper.SqlMapper.<QueryAsync>d__221.MoveNext() in D:\GitHub\dapper-dot-net\Dapper\SqlMapper.Async.cs:line 210

Removing CommandBehavior.SingleResult worked, though that is obviously not the universal answer.

[mgravell]

This is actually a sqlite provider bug; a PR for this has been merged. I
get that it is vexing, though. I'm tempted to try and detect this error,
set a global flag, and retry (not setting this in future). This would mean
that it works with the optimisation when fixed at the provider.

On Mon, 22 Feb 2016 19:37 AdamDotNet [email protected] wrote:

See
https://github.com/StackExchange/dapper-dot-net/blob/master/Dapper/SqlMapper.Async.cs#L210

NuGets:
Microsoft.Data.Sqlite 1.0.0-rc1-final
Microsoft.Extensions.PlatformAbstractions 1.0.0-rc1-final

dapper-dot-net master branch

This exception is thrown.
at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior
behavior)
at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReaderAsync(CommandBehavior
behavior, CancellationToken cancellationToken)
at Microsoft.Data.Sqlite.SqliteCommand.d__52.MoveNext()

--- End of stack trace from previous location where exception was thrown

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task)
at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable
1.ConfiguredTaskAwaiter.GetResult()
at Dapper.SqlMapper.d__221.MoveNext() in
D:\GitHub\dapper-dot-net\Dapper\SqlMapper.Async.cs:line 210

Removing CommandBehavior.SingleResult worked, though that is obviously
not the universal answer.

—
Reply to this email directly or view it on GitHub
#466.

[AdamDotNet]

Fair enough! I was wondering if bugs with Dapper were actually bugs with a pre-release version of SQLite. I'll go ahead and close this one and watch for a new SQLite release.

[mgravell]

@AdamDotNet I added a workaround for this into the code. Of course, that doesn't help if the parameters refuse to work at all (#467), but ... this bit won't bite after the next build ;)

[AdamDotNet]

Cool, thanks!

[mgravell]

For reference: issue / pull request

[mgravell]

deployed 1.50-beta9