Module: Chicago::ETL::SequelExtensions::DependantTables

Defined in:
lib/chicago/etl/sequel/dependant_tables.rb

Instance Method Summary collapse

Instance Method Details

#dependant_tables(recurse = true) ⇒ Object

Returns an Array of table names used in this dataset.

Handles joins and if the recurse flag is true, unions and nested datasets.



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# File 'lib/chicago/etl/sequel/dependant_tables.rb', line 11

def dependant_tables(recurse=true)
  tables = extract_dependant_tables_in_clause(opts[:from].first, recurse)

  if opts[:compounds]
    tables += opts[:compounds].map {|(_, dataset, _)|
      dataset.dependant_tables
    }
  end

  if opts[:join]
    tables += opts[:join].map {|join| 
      extract_dependant_tables_in_clause(join.table, recurse)
    }
  end

  tables.flatten.uniq
end