mihaibudiu commented on code in PR #4096:
URL: https://github.com/apache/calcite/pull/4096#discussion_r1891020337
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core/src/main/java/org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.java:
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@@ -629,6 +630,28 @@ private RelDataType getTightestCommonTypeOrThrow(
}
}
+ if (typeName1 == SqlTypeName.ROW) {
+ if (typeName2 != typeName1) {
+ return null;
+ }
+ if (type1.getFieldCount() != type2.getFieldCount()) {
+ return null;
+ }
+ List<RelDataTypeField> leftFields = type1.getFieldList();
+ List<RelDataTypeField> rightFields = type2.getFieldList();
+ List<RelDataTypeField> resultFields = new ArrayList<>();
+ for (int i = 0; i < leftFields.size(); i++) {
Review Comment:
That is done a few lines above
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