xzh_dz created CALCITE-4251:
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Summary: Overload RelMetadataQuery#getColumnOrigin method
Key: CALCITE-4251
URL: https://issues.apache.org/jira/browse/CALCITE-4251
Project: Calcite
Issue Type: Wish
Reporter: xzh_dz
A case:
{code:java}
//
select col1, col2 , sum(count_col4) as sum_col4
from (
select col1, col2, col3, count(col4) as count_col4
from tbl
group by col1, col2, col3
)
group by col1, col2
{code}
When i try to get the `sum_col4` origin column field,it will return null and it
is derived. we always get the origin column although it is derived. We should
overload this method.
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