korlov42 commented on code in PR #2047:
URL: https://github.com/apache/ignite-3/pull/2047#discussion_r1220912877
##########
modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/type/IgniteTypeSystem.java:
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@@ -148,4 +149,36 @@ public RelDataType deriveSumType(RelDataTypeFactory
typeFactory, RelDataType arg
return typeFactory.createTypeWithNullability(sumType,
argumentType.isNullable());
}
+
+ /**
+ * Checks that {@code toType} and {@code fromType} have compatible type
families taking into account custom data types.
Review Comment:
Could you please clarify what compatibility means?
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