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Posted to dev@calcite.apache.org by "Lantao Jin (Jira)" <ji...@apache.org> on 2021/08/12 08:31:00 UTC

[jira] [Created] (CALCITE-4729) Column in CTE should be ambiguous

Lantao Jin created CALCITE-4729:
-----------------------------------

             Summary: Column in CTE should be ambiguous
                 Key: CALCITE-4729
                 URL: https://issues.apache.org/jira/browse/CALCITE-4729
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Lantao Jin


{code}
create table test (a int);
with t as
(
  select * from test t1 join test t2 on t1.a=t2.a
)
select t.a from t;
{code}
The above query fails with 't.a' is ambiguous in Spark/Presto/Postgres. But it succeeds in Calcite. Currently, many and many companies use Calcite as a query federation layer upon multiple query engines such as Spark and Presto. But this behavior confused users.



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