BinShi-SecularBird commented on a change in pull request #463: Phoenix stats
Initial Commit
URL: https://github.com/apache/phoenix/pull/463#discussion_r267035548
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File path:
phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
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@@ -694,4 +694,136 @@ 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>> newRanges = new
ArrayList<>(this.getRanges());
+
+ int[] slotSpans = this.getSlotSpans();
+
+ // If the ranges here do not qualify all the keys then those
keys are unbound
+ if (newRanges.size() < schema.getMaxFields()) {
+ int originalSize = newRanges.size();
+ for (int i = 0; i < schema.getMaxFields() - originalSize;
i++) {
+
newRanges.add(Lists.newArrayList(KeyRange.EVERYTHING_RANGE));
+ }
+ slotSpans = new int[schema.getMaxFields()];
+ System.arraycopy(this.getSlotSpans(), 0, slotSpans, 0,
this.getSlotSpans().length);
+ }
+
+ // Product to bound our counting loop for safety
+ int rangesPermutationsCount = 1;
+ for (int i = 0; i < newRanges.size(); i++) {
+ rangesPermutationsCount *= newRanges.get(i).size();
+ }
+
+ // Have to construct the intersection
+ List<KeyRange> expandedRanges =
Lists.newArrayListWithCapacity(rangesPermutationsCount);
+ int[] positions = new int[slotSpans.length];
+
+ int maxKeyLength = SchemaUtil.getMaxKeyLength(schema,
newRanges);
+ byte[] keyBuffer = new byte[maxKeyLength];
+
+ // Counting Loop
+ int count = 0;
+ while (count < rangesPermutationsCount) {
+ byte[] lowerBound;
+ byte[] upperBound;
+
+ // Note ScanUtil.setKey internally handles the upper/lower
exclusive from a Scan
+ // point of view. It would be good to break it out in the
future for rowkey
+ // construction vs ScanKey construction To handle
differences between
+ // hbase 2 and hbase 1 scan boundaries
+ int result = ScanUtil.setKey(schema, newRanges, slotSpans,
positions, KeyRange.Bound.LOWER, keyBuffer,
+ 0, 0, slotSpans.length);
+
+ if (result < 0) {
+ // unbound
+ lowerBound = KeyRange.UNBOUND;
+ } else {
+ lowerBound = Arrays.copyOf(keyBuffer, result);
+ }
+
+ result = ScanUtil.setKey(schema, newRanges, slotSpans,
positions, KeyRange.Bound.UPPER, keyBuffer, 0, 0,
+ slotSpans.length);
+
+ if (result < 0) {
+ // unbound
+ upperBound = KeyRange.UNBOUND;
+ } else {
+ upperBound = Arrays.copyOf(keyBuffer, result);
+ }
+
+
+ /*
+ * This is already considered inside of ScanUtil.setKey we
may want to refactor to pull these out.
+ * range/single boundary bound increment
+ * range inclusive lower no
+ * range inclusive upper yes, at
the end if occurs at any slots.
+ * range exclusive lower yes
+ * range exclusive upper no
+ * single inclusive lower no
+ * single inclusive upper yes, at
the end if it is the last slots.
+ */
Review comment:
Can we have test case for this func spec, i.e., for all these cases in
comments, every returned key range's upper boundary is exclusive?
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