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  1. MariaDB Server
  2. MDEV-11747

Suspicious limitation for RANGE frames

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      Description

      Note: results below are from 10.2 348ccb6f038a6c1.

      MariaDB [test]> create table t (i int, j int);
      Query OK, 0 rows affected (0.36 sec)
       
      MariaDB [test]> select i, nth_value(i,2) over (partition by i order by i, j range unbounded preceding) from t;
      ERROR 4019 (HY000): RANGE-type frame requires ORDER BY clause with single sort key
      

      I'm not sure whether it's supposed to be so, or it's a leftover from some previous limitations. The KB page is still nothing more than a stub, it's not helpful at all.

      For ROWS, it works

      MariaDB [test]> select i, nth_value(i,2) over (partition by i order by i, j rows unbounded preceding) from t;
      Empty set (0.00 sec)
      

      In PostgreSQL 9.4, it works (of course, PostgreSQL has its own limitations for RANGE):

      postgres=# create table t (i int, j int);
      CREATE TABLE
      postgres=# select i, nth_value(i,2) over (partition by i order by i, j range unbounded preceding) from t;
       i | nth_value 
      ---+-----------
      (0 rows)
      

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              Assignee:
              cvicentiu Vicențiu Ciorbaru
              Reporter:
              elenst Elena Stepanova
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                Updated:

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