ajantha-bhat commented on a change in pull request #3773:
URL: https://github.com/apache/carbondata/pull/3773#discussion_r467095038
##########
File path:
core/src/main/java/org/apache/carbondata/core/datastore/page/encoding/compress/DirectCompressCodec.java
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@@ -246,7 +239,29 @@ public void decodeAndFillVector(byte[] pageData,
ColumnVectorInfo vectorInfo, Bi
vector = ColumnarVectorWrapperDirectFactory
.getDirectVectorWrapperFactory(vector, vectorInfo.invertedIndex,
nullBits, deletedRows,
true, false);
- fillVector(pageData, vector, vectorDataType, pageDataType, pageSize,
vectorInfo, nullBits);
+ Deque<CarbonColumnVectorImpl> vectorStack = vectorInfo.getVectorStack();
+ // Only if vectorStack is null, it is initialized with the parent vector
+ if (vectorStack == null && vectorInfo.vector.getColumnVector() != null) {
+ vectorStack = new ArrayDeque<>();
+ // pushing the parent vector
+ vectorStack.push((CarbonColumnVectorImpl)
vectorInfo.vector.getColumnVector());
+ vectorInfo.setVectorStack(vectorStack);
+ }
+ /*
+ * if top of vector stack is a complex vector then
+ * add their children into the stack and load them too.
+ * TODO: If there are multiple children push them into stack and load
them iteratively
+ */
+ if (vectorStack != null && vectorStack.peek().isComplex()) {
+ vectorStack.peek().setChildrenElements(pageData);
+ vectorStack.push(vectorStack.peek().getChildrenVector().get(0));
+ vectorStack.peek().loadPage();
+ return;
+ }
+
+ FillVector fill = new FillVector(pageData, vectorInfo, nullBits);
+ fill.basedOnType(vector, vectorDataType, pageSize, pageDataType);
+
Review comment:
pop from the stack as child is processed
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