Method: SQL::Maker::Select#_add_index_hint

Defined in:

lib/sql/maker/select.rb

#_add_index_hint(*args) ⇒ Object

# File 'lib/sql/maker/select.rb', line 317

def _add_index_hint(*args)
  table, as = parse_args(*args)
  tbl_name =
    if table.respond_to?(:as_sql)
      '(' + table.as_sql + ')'
    else
      self._quote(table)
    end
  quoted = as ? tbl_name + ' ' + self._quote(as) : tbl_name
  hint = self.index_hint[table]
  return quoted unless hint && hint.is_a?(Hash)
  if hint[:list]&& !hint[:list].empty?
    return quoted + ' ' + (hint[:type].upcase || 'USE') + ' INDEX (' + 
      hint[:list].map {|e| self._quote(e) }.join(',') + ')'
  end
  return quoted
end