Reynold Xin created SPARK-13957:
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Summary: Support group by position in SQL
Key: SPARK-13957
URL: https://issues.apache.org/jira/browse/SPARK-13957
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Reynold Xin
This is to support order by position in SQL, e.g.
{noformat}
select c1, c2, c3, sum(*) from tbl group by by 1, 3, c4
{noformat}
should be equivalent to
{noformat}
select c1, c2, c3, sum(*) from tbl order by c1, c3, c4
{noformat}
We only convert integer literals (not foldable expressions).
For positions that are aggregate functions, an analysis exception should be
thrown, e.g. in postgres;
{noformat}
rxin=# select 'one', 'two', count(*) from r1 group by 1, 3;
ERROR: aggregate functions are not allowed in GROUP BY
LINE 1: select 'one', 'two', count(*) from r1 group by 1, 3;
^
{noformat}
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