BinShi-SecularBird commented on a change in pull request #463: Phoenix stats
Initial Commit
URL: https://github.com/apache/phoenix/pull/463#discussion_r265830442
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File path:
phoenix-core/src/main/java/org/apache/phoenix/iterate/BaseResultIterators.java
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@@ -550,6 +550,76 @@ public BaseResultIterators(QueryPlan plan, Integer
perScanLimit, Integer offset,
}
return ranges;
}
+
+ private List<KeyRange> getRegionRowKeyRanges() throws SQLException {
+ List<HRegionLocation> regionLocations =
getRegionBoundaries(scanGrouper); //Load the region information
+
+ List<KeyRange> regionKeyRanges =
Lists.newArrayListWithExpectedSize(regionLocations.size());
+
+ //Map each HRegionLocation to a KeyRange - no Java 8
+ for(HRegionLocation regionLocation : regionLocations){
+ HRegionInfo regionInfo = regionLocation.getRegionInfo();
+
+ //Region is upperInclusive false by definition
+ KeyRange range = KeyRange.getKeyRange(regionInfo.getStartKey(),
true, regionInfo.getEndKey(), false);
+ regionKeyRanges.add(range);
+ }
+ return regionKeyRanges;
+ }
+
+ List<List<KeyRange>> getQueryRowKeyRanges(List<KeyRange> regionKeyRanges) {
+ ScanRanges scanRanges = context.getScanRanges();
+
+ RowKeySchema schema = scanRanges.getSchema();
+
+ PTable table = getTable();
+ boolean isLocalIndex = table.getIndexType() == IndexType.LOCAL;
+
+ //Use the dataplan to build the queryRowKeyRanges
+ if (isLocalIndex) {
+ // should always have a data plan when a local index is being used.
+ if (dataPlan != null && dataPlan.getTableRef().getTable().getType()
+ != PTableType.INDEX) { // Sanity check
+ scanRanges =
+
computePrefixScanRanges(dataPlan.getContext().getScanRanges(),
+ computeColumnsInCommon());
+ }
+ }
+
+ List<KeyRange> queryRowKeyRanges = scanRanges.getRowKeyRanges();
+
+ if(isLocalIndex){
+ List<KeyRange> newQueryRowKeyRanges =
Lists.newArrayListWithExpectedSize(queryRowKeyRanges.size() *
regionKeyRanges.size());
+
+ for(KeyRange regionKeyRange : regionKeyRanges) {
+ for (KeyRange queryRowKeyRange : queryRowKeyRanges) {
+ KeyRange
+ newQueryRowKeyRange =
queryRowKeyRange.prependRange(regionKeyRange.getLowerRange(),0,regionKeyRange.getLowerRange().length);
+ newQueryRowKeyRanges.add(newQueryRowKeyRange);
+ }
+ }
+ queryRowKeyRanges = newQueryRowKeyRanges;
+ }
+
+ // Filter the region list based on the queryKeyRanges
+ // Assumed Regions are in ascending key order
+ // Note that regions KeyRanges to scan KeyRanges are a many to many
relationship
+ // That is a scan range can cross multiple regions or multiple scan
ranges may be in a single region
+ List<List<KeyRange>> scanRowKeyRanges =
Lists.newArrayListWithExpectedSize(regionKeyRanges.size());
+
+ for (KeyRange regionKeyRange : regionKeyRanges) {
+ List<KeyRange> regionQueryIntersections =
KeyRange.intersect(Lists.newArrayList(regionKeyRange), queryRowKeyRanges);
+ if((regionQueryIntersections.size() == 1 &&
regionQueryIntersections.get(0).equals(KeyRange.EMPTY_RANGE))) {
+ scanRowKeyRanges.add(new ArrayList<KeyRange>());
+ }
+ else
+ {
Review comment:
(Coding Style) Should it be "else {"?
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