xionglei0 opened a new issue #1809: support udtf：user defined table generation URL: https://github.com/apache/incubator-doris/issues/1809 we need to explode one line to multi lines,like json string or array string this is what udtf do， like table test_udtf: **select * from test_udtf;** +-------------+------------+--+ | pageid | adid_list | +-------------+------------+--+ | front_page | [1,2,3] | | end_page | [4,3,6] | +-------------+------------+--+ hive implements udtf like this: grammer one: **select pageid, score from test_udtf1 lateral view explode(adid_list) scores as score;** Grammer two: **select pageid, explode(adid_list) as score from test_udtf ;** +-------------+--------+--+ | pageid | score | +-------------+--------+--+ | front_page | 1 | | front_page | 2 | | front_page | 3 | | end_page | 4 | | end_page | 3 | | end_page | 6 | +-------------+--------+--+
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