[jira] [Created] (CALCITE-4521) Support User Defined Table-valued Function

["herodu (Jira)" <ji...@apache.org>]

herodu created CALCITE-4521:
-------------------------------

             Summary: Support User Defined Table-valued Function
                 Key: CALCITE-4521
                 URL: https://issues.apache.org/jira/browse/CALCITE-4521
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: herodu


It already support TUMBLE/HOP/SESSION windowing table-valued function in current version. But in fact, the table-valued function is not just the current features, so we want to support user defined table-valued function, just like the following query:

 
{code:java}
// code placeholder
select * from table(UDTVF(table Shipments))
{code}
or

 

 
{code:java}
// code placeholder
select * from table(UDTVF(select * from Shipments)){code}
 

The input parameters of 'UDTVF' is the output rowtype of the inner subquery, and the output of 'UDTVF' is defined by user, like: 

 
{code:java}
// code placeholder
final TableValuedFunction tableValuedFunction =
    (RelDataTypeFactory typeFactory) -> typeFactory.builder()
        .add("in1", SqlTypeName.INTEGER)
        .add("in2", SqlTypeName.VARCHAR)
        .build();
{code}
 

And the expected output logic plan like: 

 
{code:java}
// code placeholder
LogicalProject(in1=[$0], in2=[$1])
  LogicalTableFunctionScan(invocation=[UDTVF($0, $1)], rowType=[RecordType(INTEGER in1,VARCHAR in2)])
    LogicalProject(ORDERID=[$0], ROWTIME=[$1])
      LogicalTableScan(table=[[CATALOG, SALES, SHIPMENTS]])
{code}
 

 



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