WIP

compare in row.cpp shoud take into account m_visible

TODO

• create local_install.sh

• set xxx - without value to reset to default value

• coalesce, date functions now; string functions rtrim, ltrim, rpad, lpad; math function round

• add pipe | concatenation

• add support for 1_000_000 numbers

• expand_asterix_char should support multiple and everywhere *

• support for reusing space of deleted rows

• support for uniqueue indexes (primary key)

• add drop m_index

• support for joining