peng wang created CALCITE-5510:
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Summary: RelToSqlConverter don't support sort by ordinal when sort
by column is a expression
Key: CALCITE-5510
URL: https://issues.apache.org/jira/browse/CALCITE-5510
Project: Calcite
Issue Type: Improvement
Components: core
Affects Versions: 1.26.0
Reporter: peng wang
For example:
Query SQL is
{code:java}
select a, sum(b) from table group by a order by 2{code}
When we convert this sql to relNode and convert it back to SQL by
RelToConverter, the result is:
{code:java}
select a, sum(b) from table group by a order by sum(b){code}
But we want to keep order by column to ordinal.
Would we add a switch in RelToConverter to control whether convert sort by
column to expression or ordinal?
Maybe we can use method isSortByOrdinal in dialect SqlConformance?
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