Failure handling some "real" columns on Sybase 11

[gsstark]

I'm not sure what's happening and I'm not sure how to debug this. I'm open to suggestions on how to gather the right data.

I'm connecting to Sybase 11.0.3.3 and thda/tds seems to handle the TDS protocol this server version is using just fine normally. However I have one particular query that causes it to behave oddly, sometimes returning no data and sometimes entering an infinite loop or crashing.

I've simplified the failing query to select convert(real, @@timeticks) x. It does not fail if I do convert(real, 1) or just do select @@timeticks. It does fail with converting other @@ variables to real though. It also doesn't fail if I do convert(float(5), @@timeticks) but does fail if I do convert(float(4) @@timeticks)

I noted "real" is handled as a single precision float, I wonder if the TDS protocol isn't actually sending a double-width float though? Or perhaps the single precision parsing is just not quite right?

[gsstark]

Here's a simple test program I've been using to test this issue though it does require a connection string to Sybase 11 to test it :)

tdsbug.tar.gz

[thda]

Thanks for reporting.
Could you please try to run the tests ?
It might help to pinpoint the issue.
As mentionned in the readme this library is only tested on 12.5 or later versions.