my7ym commented on a change in pull request #1104: [CALCITE-2900]
RewriteRexShuttle generates wrong type during flatten for structured type when
visitInputRef
URL: https://github.com/apache/calcite/pull/1104#discussion_r266270346
##########
File path:
core/src/main/java/org/apache/calcite/sql2rel/RelStructuredTypeFlattener.java
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@@ -303,9 +303,11 @@ protected int getNewForOldInput(int oldOrdinal) {
* corresponding field post-flattening, and also returns its type.
*
* @param oldOrdinal Pre-flattening ordinal
+ * @param existingOffset offset already calculated the target column inside
the oldOrdinal column.
+ * For unnested column, it should be 0.
* @return Post-flattening ordinal and type
*/
- protected Ord<RelDataType> getNewFieldForOldInput(int oldOrdinal) {
+ protected Ord<RelDataType> getNewFieldForOldInput(int oldOrdinal, int
existingOffset) {
Review comment:
Oh, I re-read the code and actually I did not delete the original method. I
will make it private since I don't see any points that people will override it.
Good catch!
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