Execution example::

  plugin_register functions/string
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  logical_range_filter \
    --logical_table Entries \
    --shard_key created_at \
    --columns[content_length].stage initial \
    --columns[content_length].type UInt32 \
    --columns[content_length].value 'string_length(content)' \
    --output_columns _id,content,content_length
  # [
  #   [
  #     0, 
  #     1337566253.89858, 
  #     0.000355720520019531
  #   ], 
  #   [
  #     [
  #       [
  #         "_id", 
  #         "UInt32"
  #       ], 
  #       [
  #         "content", 
  #         "Text"
  #       ], 
  #       [
  #         "content_length", 
  #         "UInt32"
  #       ]
  #     ], 
  #     [
  #       1, 
  #       "Welcome! This is my first post!", 
  #       31
  #     ], 
  #     [
  #       2, 
  #       "I started to use Groonga. It's very fast!", 
  #       41
  #     ], 
  #     [
  #       3, 
  #       "I also started to use Mroonga. It's also very fast! Really fast!", 
  #       64
  #     ], 
  #     [
  #       1, 
  #       "I migrated all Senna system!", 
  #       28
  #     ], 
  #     [
  #       2, 
  #       "I also migrated all Tritonn system!", 
  #       35
  #     ]
  #   ]
  # ]
