[jira] [Created] (IGNITE-20294) Sql. Investigate using UDF as a place for system_range function

[Evgeny Stanilovsky (Jira)]

Evgeny Stanilovsky created IGNITE-20294:
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             Summary: Sql. Investigate using UDF as a place for system_range 
function
                 Key: IGNITE-20294
                 URL: https://issues.apache.org/jira/browse/IGNITE-20294
             Project: Ignite
          Issue Type: Improvement
          Components: sql
    Affects Versions: 3.0.0-beta1
            Reporter: Evgeny Stanilovsky


For now system_range implementation stores at RexImpTable, check:

{noformat}
      map.put(TYPEOF, systemFunctionImplementor);
      map.put(SYSTEM_RANGE, systemFunctionImplementor);
{noformat}

Investigate the way this functions can be removed under UDF implementation.

[1] 
https://stackoverflow.com/questions/44147819/adding-a-user-defined-function-to-
calcite




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