reuvenlax commented on a change in pull request #16988:
URL: https://github.com/apache/beam/pull/16988#discussion_r819932131
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File path: sdks/java/core/src/main/java/org/apache/beam/sdk/values/Row.java
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@@ -108,11 +109,32 @@
/** Return the list of data values. */
public abstract List<Object> getValues();
+ /** This is recursive call to get all the values of the nested rows.
+ The recusion is bounded by the amount of nesting with in the data
+ This mirrors the unnest behavior of calcite towards schema **/
+ public List<Object> getNestedRowBaseValues() {
+ return IntStream.range(0, getFieldCount())
+ .mapToObj(i -> {
+ List<Object> values = new ArrayList<>();
+ FieldType fieldType = this.getSchema().getField(i).getType();
+ if(fieldType.getTypeName().equals(TypeName.ROW)) {
+ Row row = this.getBaseValue(i, Row.class);
+ List<Object> rowValues = row.getNestedRowBaseValues();
+ if(null != rowValues) {
+ values.addAll(rowValues);
+ }
+ } else {
+ values.add(this.getBaseValue(i));
+ }
+ return values.stream();
+ }).flatMap(Function.identity()).collect(Collectors.toList());
+ }
Review comment:
Agree - Row is used by Beam users who don't use SQL. We should not be
adding SQL-specific code inside Row.
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