Remove reduntant maps optimization

cube2222 / octosql

OctoSQL is a query tool that allows you to join, analyse and transform data from multiple databases and file formats using SQL.

Mozilla Public License 2.0

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Remove reduntant maps optimization #199

Closed JasiekChomiak closed 4 years ago

JasiekChomiak commented 4 years ago

This PR introduces a optimization scenario that reduces Map{expressions: [], source: some_source, keep: true} to some_source, since those two nodes yield the same results.