[jira] [Created] (CALCITE-886) Calcite hits SqlValidatorException when group by clause has system functions

["Jinfeng Ni (JIRA)" <ji...@apache.org>]

Jinfeng Ni created CALCITE-886:
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             Summary: Calcite hits SqlValidatorException when group by clause has system functions
                 Key: CALCITE-886
                 URL: https://issues.apache.org/jira/browse/CALCITE-886
             Project: Calcite
          Issue Type: Bug
            Reporter: Jinfeng Ni
            Assignee: Jinfeng Ni


The system functions are the ones that do not have parentheses, like CURRENT_DATE, CURRENT_TIME, CURRENT_USER, etc.

When such functions appear in the group by clause, Calcite will hit SqlValidatorException, complaining the column with the function name could not be found in any table.

For instance,

{code}
select CURRENT_USER from SCOTT.EMP GROUP BY CURRENT_USER;

org.apache.calcite.sql.validate.SqlValidatorException <init>
SEVERE: org.apache.calcite.sql.validate.SqlValidatorException: Column 'CURRENT_USER' not found in any table
{code}

This query runs perfectly fine.
{code}
select CURRENT_USER from SCOTT.EMP limit 1;
{code}

Looks like the sql validation logic for group by clause could not recognize SqlIdentifier which may represent a function w/o parentheses.




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