Merge pull request #275 from Qrlew/fix_order_by

Fix order by

Merge pull request #273 from Qrlew/fix_devide_by_zero_error

Fix devide by zero error

Merge pull request #268 from Qrlew/bug_joins

Preserve columns names when SELECT * and JOIN

Updated Values

Fix UNIQUE propagation

Merge pull request #262 from Qrlew/261-many-relations-should-not-shar…

…e-the-same-name-+-pid-should-stay-unique

261 many relations should not share the same name + pid should stay unique

ok

Merge pull request #259 from Qrlew/fit_case_insensitivness

Fit queries with unquoted uppercase identifiers

Merge pull request #258 from Qrlew/256-evaluate-the-multiplicity-clip…

…ping-bounds-with-dp

256 evaluate the multiplicity clipping bounds with dp

Minor naming