modified:   storage/connect/json.cpp
  modified:   storage/connect/json.h
  modified:   storage/connect/jsonudf.cpp
  modified:   storage/connect/mysql-test/connect/r/json_udf.result
  modified:   storage/connect/mysql-test/connect/t/json.test
  modified:   storage/connect/tabjson.cpp

Fix wrong calculation of Estimated Length when the table has virtual or special columns
  modified:   storage/connect/reldef.h
  modified:   storage/connect/tabdos.cpp

Fix wrong handling of null values in ODBCCOL::ReadColumn
  modified:   storage/connect/tabodbc.cpp

Fix crash when SetValue_char is called with a negative length value.
This can happen in odbconn.cpp when SQLFetch returns SQL_NO_TOTAL (-4) as length.
  modified:   storage/connect/odbconn.cpp
  modified:   storage/connect/value.cpp