File: usage_window_function.log

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Execution example::

  plugin_register functions/number
  # [[0,1337566253.89858,0.000355720520019531],true]
  select \
    --table Entries \
    --columns[n_likes_sum_per_tag].stage initial \
    --columns[n_likes_sum_per_tag].type UInt32 \
    --columns[n_likes_sum_per_tag].value 'window_sum(n_likes)' \
    --columns[n_likes_sum_per_tag].window.group_keys tag \
    --output_columns tag,n_likes,n_likes_sum_per_tag
  # [
  #   [
  #     0,
  #     1337566253.89858,
  #     0.000355720520019531
  #   ],
  #   [
  #     [
  #       [
  #         5
  #       ],
  #       [
  #         [
  #           "tag",
  #           "ShortText"
  #         ],
  #         [
  #           "n_likes",
  #           "UInt32"
  #         ],
  #         [
  #           "n_likes_sum_per_tag",
  #           "UInt32"
  #         ]
  #       ],
  #       [
  #         "Hello",
  #         5,
  #         5
  #       ],
  #       [
  #         "Groonga",
  #         10,
  #         25
  #       ],
  #       [
  #         "Groonga",
  #         15,
  #         25
  #       ],
  #       [
  #         "Senna",
  #         3,
  #         6
  #       ],
  #       [
  #         "Senna",
  #         3,
  #         6
  #       ]
  #     ]
  #   ]
  # ]