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https://issues.apache.org/jira/browse/PHOENIX-7015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17808009#comment-17808009
]
ASF GitHub Bot commented on PHOENIX-7015:
-----------------------------------------
TheNamesRai commented on code in PR #1794:
URL: https://github.com/apache/phoenix/pull/1794#discussion_r1456914360
##########
phoenix-core/src/main/java/org/apache/phoenix/coprocessor/CDCGlobalIndexRegionScanner.java:
##########
@@ -104,115 +94,74 @@ protected Scan prepareDataTableScan(Collection<byte[]>
dataRowKeys) throws IOExc
protected boolean getNextCoveredIndexRow(List<Cell> result) throws
IOException {
if (indexRowIterator.hasNext()) {
List<Cell> indexRow = indexRowIterator.next();
- for (Cell c: indexRow) {
- if (c.getType() == Cell.Type.Put) {
- result.add(c);
- }
- }
+ Cell firstCell = indexRow.get(indexRow.size() - 1);
+ byte[] indexRowKey = new ImmutableBytesPtr(firstCell.getRowArray(),
+ firstCell.getRowOffset(), firstCell.getRowLength())
+ .copyBytesIfNecessary();
+ ImmutableBytesPtr dataRowKey = new ImmutableBytesPtr(
+ indexToDataRowKeyMap.get(indexRowKey));
+ Result dataRow = dataRows.get(dataRowKey);
+ Long indexCellTs = firstCell.getTimestamp();
+ Cell.Type indexCellType = firstCell.getType();
+
+ Map<ImmutableBytesPtr, Cell> preImageObj = new HashMap<>();
+ Map<ImmutableBytesPtr, Cell> changeImageObj = new HashMap<>();
+ List<Cell> resultCells = Arrays.asList(dataRow.rawCells());
+ Collections.sort(resultCells,
CellComparator.getInstance().reversed());
+
+ boolean isIndexCellDeleteRow = false;
+ boolean isIndexCellDeleteColumn = false;
try {
- Result dataRow = null;
- if (! result.isEmpty()) {
- Cell firstCell = result.get(0);
- byte[] indexRowKey = new
ImmutableBytesPtr(firstCell.getRowArray(),
- firstCell.getRowOffset(), firstCell.getRowLength())
- .copyBytesIfNecessary();
- ImmutableBytesPtr dataRowKey = new ImmutableBytesPtr(
- indexToDataRowKeyMap.get(indexRowKey));
- dataRow = dataRows.get(dataRowKey);
- Long indexRowTs = result.get(0).getTimestamp();
- Map<Long, Map<ImmutableBytesPtr, Cell>> changeTimeline =
dataRowChanges.get(
- dataRowKey);
- if (changeTimeline == null) {
- List<Cell> resultCells =
Arrays.asList(dataRow.rawCells());
- Collections.sort(resultCells,
CellComparator.getInstance().reversed());
- List<Cell> deleteMarkers = new ArrayList<>();
- List<List<Cell>> columns = new LinkedList<>();
- Cell currentColumnCell = null;
- Pair<byte[], byte[]> emptyKV =
EncodedColumnsUtil.getEmptyKeyValueInfo(
-
EncodedColumnsUtil.getQualifierEncodingScheme(scan));
- List<Cell> currentColumn = null;
- Set<Long> uniqueTimeStamps = new HashSet<>();
- // TODO: From CompactionScanner.formColumns(), see if
this can be refactored.
- for (Cell cell : resultCells) {
- uniqueTimeStamps.add(cell.getTimestamp());
- if (cell.getType() != Cell.Type.Put) {
- deleteMarkers.add(cell);
- }
- if (CellUtil.matchingColumn(cell,
QueryConstants.DEFAULT_COLUMN_FAMILY_BYTES,
- emptyKV.getFirst())) {
- continue;
- }
- if (currentColumnCell == null) {
- currentColumn = new LinkedList<>();
- currentColumnCell = cell;
- currentColumn.add(cell);
- } else if (!CellUtil.matchingColumn(cell,
currentColumnCell)) {
- columns.add(currentColumn);
- currentColumn = new LinkedList<>();
- currentColumnCell = cell;
- currentColumn.add(cell);
- } else {
- currentColumn.add(cell);
- }
+ for (Cell cell : resultCells) {
+ if (cell.getType() == Cell.Type.DeleteColumn) {
+ // DDL is not supported in CDC
+ if (cell.getTimestamp() == indexCellTs) {
+ isIndexCellDeleteColumn = true;
+ break;
Review Comment:
As we just have to ignore all the DeleteColumn cells, even if one of them
matches with the timestamp of the current index row cell. We can just break out
of this loop.
> Extend UncoveredGlobalIndexRegionScanner for CDC region scanner usecase
> -----------------------------------------------------------------------
>
> Key: PHOENIX-7015
> URL: https://issues.apache.org/jira/browse/PHOENIX-7015
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Viraj Jasani
> Priority: Major
>
> For CDC region scanner usecase, extend UncoveredGlobalIndexRegionScanner to
> CDCUncoveredGlobalIndexRegionScanner. The new region scanner for CDC performs
> raw scan to index table and retrieve data table rows from index rows.
> Using the time range, it can form a JSON blob to represent changes to the row
> including pre and/or post row images.
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