When the API inserts data into ColumnStore which will roll over into a
new extent that data wasn't being put into the new extent and corruption
occured. This patch now tracks the additional data and inserts it into
the new extent. It also makes sure the LBIDs are stored so that they are
correctly committed.
The rowID and therefore HWM for an insert was being calculated based on
the first column. If there are smaller columns in the table these will
insert in the middle of blocks instead of creating new blocks. This means
that we would no longer be crash safe and PrimProc gets very confused until
a cache flush.
We now use the smallest column to calculate the rowID and HWM increment
(as cpimport does).
* TEXT and BLOB now have separate identifiers internally
* TEXT columns are identified as such in system catalog
* cpimport only requires hex input for BLOB, not TEXT
* DML writes for multi-block dictionary (blob) now works
* PrimProc fixed so that the first block in multi-block is read
correctly
* Performance optimisation (removed string copy into stack) for new
dictionary entries
