tkhurana commented on a change in pull request #1183:
URL: https://github.com/apache/phoenix/pull/1183#discussion_r601719128
##########
File path:
phoenix-core/src/main/java/org/apache/phoenix/execute/MutationState.java
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@@ -404,67 +434,89 @@ public int getNumRows() {
return numRows;
}
+ private MultiRowMutationState getLastMutationBatch(Map<TableRef,
List<MultiRowMutationState>> mutations, TableRef tableRef) {
+ List<MultiRowMutationState> mutationBatches = mutations.get(tableRef);
+ if (mutationBatches == null || mutationBatches.isEmpty()) {
+ return null;
+ }
+ return mutationBatches.get(mutationBatches.size() - 1);
+ }
+
private void joinMutationState(TableRef tableRef, MultiRowMutationState
srcRows,
- Map<TableRef, MultiRowMutationState> dstMutations) {
+ Map<TableRef, List<MultiRowMutationState>> dstMutations) {
PTable table = tableRef.getTable();
boolean isIndex = table.getType() == PTableType.INDEX;
- boolean incrementRowCount = dstMutations == this.mutations;
- MultiRowMutationState existingRows = dstMutations.put(tableRef,
srcRows);
- if (existingRows != null) { // Rows for that table already exist
- // Loop through new rows and replace existing with new
- for (Map.Entry<ImmutableBytesPtr, RowMutationState> rowEntry :
srcRows.entrySet()) {
- // Replace existing row with new row
- RowMutationState existingRowMutationState =
existingRows.put(rowEntry.getKey(), rowEntry.getValue());
- if (existingRowMutationState != null) {
- Map<PColumn, byte[]> existingValues =
existingRowMutationState.getColumnValues();
- if (existingValues != PRow.DELETE_MARKER) {
- Map<PColumn, byte[]> newRow =
rowEntry.getValue().getColumnValues();
- // if new row is PRow.DELETE_MARKER, it means delete,
and we don't need to merge it with
- // existing row.
- if (newRow != PRow.DELETE_MARKER) {
- // decrement estimated size by the size of the old
row
- estimatedSize -=
existingRowMutationState.calculateEstimatedSize();
- // Merge existing column values with new column
values
- existingRowMutationState.join(rowEntry.getValue());
- // increment estimated size by the size of the new
row
- estimatedSize +=
existingRowMutationState.calculateEstimatedSize();
- // Now that the existing row has been merged with
the new row, replace it back
- // again (since it was merged with the new one
above).
- existingRows.put(rowEntry.getKey(),
existingRowMutationState);
- }
- }
- } else {
- if (incrementRowCount && !isIndex) { // Don't count index
rows in row count
- numRows++;
- // increment estimated size by the size of the new row
- estimatedSize +=
rowEntry.getValue().calculateEstimatedSize();
- }
- }
- }
- // Put the existing one back now that it's merged
- dstMutations.put(tableRef, existingRows);
- } else {
+ boolean incrementRowCount = dstMutations == this.mutationsMap;
+ // we only need to check if the new mutation batch (srcRows) conflicts
with the
+ // last mutation batch
Review comment:
Because we only try to merge the new batch with the last one. That is
why we only check for conflicts with the last one. All previous batches are not
updated.
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