MySQL empty text/blob

[hmagarotto]

Assertion violation in debug binary with empty text field:

    Poco::Data::Session ses(Poco::Data::MySQL::Connector::KEY,...);
    ses << "DROP TABLE IF EXISTS Dummy", Poco::Data::now;
    ses <<  "CREATE TABLE Dummy(data TEXT)", Poco::Data::now;
    ses << "INSERT INTO Dummy VALUES('')", Poco::Data::now;
    ses << "SELECT data FROM Dummy", Poco::Data::now;

Assertion violation: pChar in file ".../poco-1.4.6-all/Data/include/Poco/Data/BLOB.h", line 180

[hmagarotto]

--- poco-1.4.6-all.original/Data/MySQL/src/Extractor.cpp    2013-01-18 17:53:20.461811217 -0200
+++ poco-1.4.6-all/Data/MySQL/src/Extractor.cpp 2013-01-18 17:51:59.145814212 -0200
@@ -158,6 +158,9 @@
   if ( ! _stmt.fetchColumn(pos, &bind) )
     return false;

+  if ( ! length )
+      return true;
+  
   std::vector<char> data(length);
   bind.buffer = &data[0];
   bind.buffer_length= length;

[aleks-f]

Did you re-run the whole testsuite after this fix?

[aleks-f]

It looks right for 1.4.6. This has changed quite a bit in 1.5; no need for a fix there.

[hmagarotto]

Sorry for a late response.
I re-run the whole testsuite and everything seems to be ok.
I still don't test 1.5 version. Will be released a fix version for 1.4.6?
Thanks.

[aleks-f]

Re-assigning this to Günter.

[aleks-f]

@obiltschnig: any plans for including this in 1.4.x?

[obiltschnig]

missed this for 1.4.6. Will be in next 1.4.x release (if there's one...)