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From GitBox <...@apache.org>
Subject [GitHub] [phoenix] BinShi-SecularBird commented on a change in pull request #463: Phoenix stats Initial Commit
Date Sat, 16 Mar 2019 00:12:59 GMT
BinShi-SecularBird commented on a change in pull request #463: Phoenix stats Initial Commit
URL: https://github.com/apache/phoenix/pull/463#discussion_r266172093
 
 

 ##########
 File path: phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
 ##########
 @@ -694,4 +694,127 @@ public TimeRange getRowTimestampRange() {
         return rowTimestampRange;
     }
 
+    /**
+     * Produces the list of KeyRanges representing the fully qualified row key by calling
into ScanUtil.setKey
+     * repeatedly for every combination of KeyRanges in the ranges field. The bounds will
be set according to the
+     * properties of the setKey method.
+     * 
+     * @return list of KeyRanges representing the fully qualified rowkey, coalesced
+     */
+    public List<KeyRange> getRowKeyRanges() {
+        // If its scanRanges are everything or nothing, then we short circuit and leave
+        // as schema is not filled in
+        if (isEverything()) { return Lists.newArrayList(KeyRange.EVERYTHING_RANGE); }
+        if (isDegenerate()) { return Lists.newArrayList(KeyRange.EMPTY_RANGE); }
+
+        List<KeyRange> queryRowKeyRanges = Lists.newArrayListWithExpectedSize(this.ranges.size());
+
+        // Point lookups are stored in the first range as a whole and already a rowkey
+        // see ScanRanges.getPointLookupKeyIterator
+        if (this.isPointLookup()) {
+            queryRowKeyRanges.addAll(this.getRanges().get(0));
+        } else {
+            // If scanRanges.ranges has no information then should be in the scanRanges.scanRange
+            if (this.getRanges().size() == 0) {
+                queryRowKeyRanges.add(this.getScanRange());
+            } else { // We have a composite key need the row key from the combination
+                // make a copy of ranges as we may add items to fully qualify our rowkey
+                List<List<KeyRange>> ranges = new ArrayList<>();
+                ranges.addAll(this.getRanges());
+
+                int[] slotSpans = this.getSlotSpans();
+
+                // If the ranges here do not qualify all the keys then those keys are unbound
+                if (ranges.size() < schema.getMaxFields()) {
+                    int originalSize = ranges.size();
+                    for (int i = 0; i < schema.getMaxFields() - originalSize; i++) {
+                        ranges.add(Lists.newArrayList(KeyRange.EVERYTHING_RANGE));
+                    }
+                    slotSpans = new int[schema.getMaxFields()];
+                }
+
+                // Product to bound our counting loop for safety
+                int rangesPermutations = 1;
+                for (int i = 0; i < ranges.size(); i++) {
+                    rangesPermutations *= ranges.get(i).size();
+                }
+
+                // Have to construct the intersection
+                List<KeyRange> expandedRanges = Lists.newArrayListWithExpectedSize(rangesPermutations);
+                int[] position = new int[slotSpans.length];
 
 Review comment:
   change name to positions?

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