  Despite recent interest in open domain question answering (ODQA) over tables,
many studies still rely on datasets that are not truly optimal for the task
with respect to utilizing structural nature of table. These datasets assume
answers reside as a single cell value and do not necessitate exploring over
multiple cells such as aggregation, comparison, and sorting. Thus, we release
Open-WikiTable, the first ODQA dataset that requires complex reasoning over
tables. Open-WikiTable is built upon WikiSQL and WikiTableQuestions to be
applicable in the open-domain setting. As each question is coupled with both
textual answers and SQL queries, Open-WikiTable opens up a wide range of
possibilities for future research, as both reader and parser methods can be
applied. The dataset and code are publicly available.
