Jackie-Jiang commented on code in PR #10905:
URL: https://github.com/apache/pinot/pull/10905#discussion_r1232927284
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/index/loader/SegmentPreProcessor.java:
##########
@@ -243,10 +243,8 @@ private void processStarTrees(File indexDir)
if (starTreeMetadataList != null) {
// There are existing star-trees
if
(StarTreeBuilderUtils.shouldRemoveExistingStarTrees(starTreeBuilderConfigs,
starTreeMetadataList)) {
Review Comment:
(minor) Let's rename this method to something like
`shouldModifyExistingStarTrees()` and also modify the documentation to reflect
the change
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/index/loader/SegmentPreProcessor.java:
##########
@@ -243,10 +243,8 @@ private void processStarTrees(File indexDir)
if (starTreeMetadataList != null) {
// There are existing star-trees
if
(StarTreeBuilderUtils.shouldRemoveExistingStarTrees(starTreeBuilderConfigs,
starTreeMetadataList)) {
- // Remove the existing star-trees
- LOGGER.info("Removing star-trees from segment: {}",
_segmentMetadata.getName());
- StarTreeBuilderUtils.removeStarTrees(indexDir);
- _segmentMetadata = new SegmentMetadataImpl(indexDir);
+ LOGGER.info("Change detected in star-trees for segment: {}",
_segmentMetadata.getName());
+ shouldGenerateStarTree = true;
Review Comment:
We can simply remove the existing star trees when `shouldGenerateStarTree`
is false (user wants to remove all the star-trees)
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/startree/v2/builder/MultipleTreesBuilder.java:
##########
@@ -115,13 +117,33 @@ public MultipleTreesBuilder(@Nullable
List<StarTreeIndexConfig> indexConfigs, bo
}
}
+ private SeparatedStarTreesMetadata getExistingStarTrees()
+ throws Exception {
+ try {
+ if (_metadataProperties.containsKey(MetadataKey.STAR_TREE_COUNT)) {
+ // Extract existing startrees
+ // clean star-tree related files and configs once all the star-trees
are separated and extracted
+ SeparatedStarTreesMetadata existingStarTrees = extractStarTrees();
+ StarTreeBuilderUtils.removeStarTrees(_segmentDirectory);
Review Comment:
`removeStarTrees()` should take `indexDir` instead of `segmentDirectory`
(even though it works if we pass in the `segmentDirectory`). `segmentDirectory`
could be the `v3` sub-directory under the `indexDir`
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