Jinfeng Ni created DRILL-927:
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Summary: Run-time code generation support when a function
parameter is complex nested type.
Key: DRILL-927
URL: https://issues.apache.org/jira/browse/DRILL-927
Project: Apache Drill
Issue Type: New Feature
Reporter: Jinfeng Ni
Assignee: Jinfeng Ni
In this JIRA, we will enhance the run-time code generation component, in the
following ways:
1. Allow generate the run-time code for function whose parameter is
FieldReader. A parameter FieldReader could match an argument of Repeated List,
Repeated Map, or an element in Repeated List/map, or any nested complex type.
2. In addition, FieldReader will also match any singular value, such as int,
float4, varchar.
With this support enabled, one could implement a function with parameter
FieldReader to match any simple or complex nested type.
As an example of how to leverage this new code generation logic, we add a new
function "convert_toJson", which will convert any simple or complex type into a
string in json format.
@Param FieldReader input;
@Output VarBinaryHolder out;
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