Stamatis Zampetakis created CALCITE-2677:
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Summary: Struct types with one field are not mapped correctly to
Java Classes
Key: CALCITE-2677
URL: https://issues.apache.org/jira/browse/CALCITE-2677
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.17.0
Reporter: Stamatis Zampetakis
Assignee: Julian Hyde
Fix For: 1.18.0
There are various places in the code where given a RelDataType we need to
obtain the respective Java Class/Type. This is done mainly through
JavaTypeFactory#getJavaClass. For the Calcite runtime it passes through
PhysType#fieldClass and PhysType#getJavaFieldType.
However, when the RelDataType is a struct of one field the returned Class/Type
is not the correct one since the struct type is simplified to the type of its
component.
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