Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/13#discussion_r14167723
--- Diff:
tajo-algebra/src/main/java/org/apache/tajo/algebra/WindowSpec.java ---
@@ -79,17 +76,47 @@ public WindowFrame getWindowFrame() {
return windowFrame;
}
+ public Object clone() throws CloneNotSupportedException {
+ WindowSpec windowSpec = (WindowSpec) super.clone();
+ windowSpec.windowName = windowName;
+ if (hasPartitionBy()) {
+ windowSpec.partitionKeys = new Expr[windowSpec.partitionKeys.length];
+ for (int i = 0; i < partitionKeys.length; i++) {
+ windowSpec.partitionKeys[i] = (Expr) partitionKeys[i].clone();
+ }
+ }
+ if (hasOrderBy()) {
+ windowSpec.sortSpecs = new Sort.SortSpec[sortSpecs.length];
+ for (int i = 0; i < sortSpecs.length; i++) {
+ windowSpec.sortSpecs[i] = (Sort.SortSpec) sortSpecs[i].clone();
+ }
+ }
+ if (hasWindowFrame()) {
+ windowSpec.windowFrame = (WindowFrame) windowFrame.clone();
+ }
+ return windowSpec;
+ }
+
@Override
public int hashCode() {
return Objects.hashCode(windowName, partitionKeys, sortSpecs);
--- End diff --
hasWindowFrame() checks whether windowFrame is null or not.
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