AngersZhuuuu commented on issue #27861: [SPARK-30707][SQL]Window function set partitionSpec as order spec when orderSpec is empty URL: https://github.com/apache/spark/pull/27861#issuecomment-597467691 ``` angerszhu=# select id, sum(num) over (partition by id angerszhu(# range between 1 preceding and 1 following) angerszhu-# from s4 ; ERROR: RANGE with offset PRECEDING/FOLLOWING requires exactly one ORDER BY column LINE 1: select id, sum(num) over (partition by id ^ angerszhu=# angerszhu=# angerszhu=# select id, sum(num) over (partition by id rows between 1 preceding and 1 following) from s4 ; id | sum ----+----- 1 | 3 2 | 3 3 | 6 4 | 7 5 | 9 6 | 9 (6 rows) angerszhu=# select id, sum(num) over (partition by id range between 1 preceding and 1 following) from s4 ; ERROR: RANGE with offset PRECEDING/FOLLOWING requires exactly one ORDER BY column LINE 1: select id, sum(num) over (partition by id ^ angerszhu=# select id, sum(num) over (partition by id range 1 preceding) from s4 ; ERROR: RANGE with offset PRECEDING/FOLLOWING requires exactly one ORDER BY column LINE 1: select id, sum(num) over (partition by id ^ angerszhu=# select id, sum(num) over (partition by id rows 1 preceding) from s4 ; id | sum ----+----- 1 | 3 2 | 3 3 | 6 4 | 7 5 | 9 6 | 9 (6 rows) angerszhu=# ```
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