Stamatis Zampetakis created CALCITE-2994:
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Summary: Least restrictive type among structs does not consider
nullability
Key: CALCITE-2994
URL: https://issues.apache.org/jira/browse/CALCITE-2994
Project: Calcite
Issue Type: Bug
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
Fix For: 1.20.0
Consider the following high-level example:
{code:sql}
CREATE TYPE Coordinates AS (
x INT,
y INT);
CREATE TABLE Address (
loc1 Coordinates NOT NULL,
loc2 Coordinates)
{code}
The least restrictive type between loc1 and loc2 is the type of loc2 (i.e., a
nullable Coordinates type).
The existing code (i.e., RelDataTypeFactory#leastRestrictive) does take into
account nullability when the type is structured type (or row type).
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