Github user wuchong commented on a diff in the pull request: https://github.com/apache/flink/pull/3020#discussion_r93566058 --- Diff: flink-core/src/main/java/org/apache/flink/api/java/typeutils/RowTypeInfo.java --- @@ -54,6 +76,152 @@ public RowTypeInfo(TypeInformation<?>... types) { } } + public RowTypeInfo(List<TypeInformation<?>> types, List<String> fieldNames) { + super(Row.class, types == null ? null : types.toArray(new TypeInformation[types.size()])); + checkNotNull(fieldNames, "FieldNames should not be null."); + checkArgument( + types.size() == fieldNames.size(), + "Number of field types and names is different."); + checkArgument( + types.size() == new HashSet<>(fieldNames).size(), + "Field names are not unique."); + + this.fieldNames = new String[fieldNames.size()]; + + for (int i = 0; i < fieldNames.size(); i++) { + this.fieldNames[i] = fieldNames.get(i); + } + } + + @Override + public void getFlatFields(String fieldExpression, int offset, List<FlatFieldDescriptor> result) { --- End diff -- It is almost ported from `CaseClassTypeInfo.getFlatFields()` except the field index. The `CaseClassTypeInfo` is 1-based, but `RowTypeInfo` is 0-based.
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