Repository: phoenix
Updated Branches:
  refs/heads/4.x-HBase-0.98 40f46b48f -> 18ec7d6a4


PHOENIX-2137 Range query on DECIMAL DESC sometimes incorrect

Conflicts:
        
phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java


Project: http://git-wip-us.apache.org/repos/asf/phoenix/repo
Commit: http://git-wip-us.apache.org/repos/asf/phoenix/commit/ac2b2083
Tree: http://git-wip-us.apache.org/repos/asf/phoenix/tree/ac2b2083
Diff: http://git-wip-us.apache.org/repos/asf/phoenix/diff/ac2b2083

Branch: refs/heads/4.x-HBase-0.98
Commit: ac2b20838d025579015f677d1fe5a4e9cef3808d
Parents: 40f46b4
Author: James Taylor <[email protected]>
Authored: Mon Aug 3 16:40:47 2015 -0700
Committer: James Taylor <[email protected]>
Committed: Thu Sep 10 21:23:50 2015 -0700

----------------------------------------------------------------------
 .../org/apache/phoenix/end2end/SortOrderIT.java | 13 ++--
 .../org/apache/phoenix/compile/ScanRanges.java  |  7 ++-
 .../DescVarLengthFastByteComparisons.java       | 12 ++++
 .../apache/phoenix/filter/SkipScanFilter.java   | 13 ++--
 .../java/org/apache/phoenix/query/KeyRange.java | 42 ++++++-------
 .../apache/phoenix/schema/types/PDataType.java  |  3 +-
 .../java/org/apache/phoenix/util/ScanUtil.java  | 63 +++++++++++++++++---
 .../org/apache/phoenix/util/SchemaUtil.java     |  2 +-
 .../phoenix/compile/WhereOptimizerTest.java     | 20 +++++++
 .../DescVarLengthFastByteComparisonsTest.java   | 45 ++++++++++++++
 .../expression/SortOrderExpressionTest.java     | 13 ++--
 11 files changed, 186 insertions(+), 47 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/it/java/org/apache/phoenix/end2end/SortOrderIT.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/it/java/org/apache/phoenix/end2end/SortOrderIT.java 
b/phoenix-core/src/it/java/org/apache/phoenix/end2end/SortOrderIT.java
index 7cc0931..25782ba 100644
--- a/phoenix-core/src/it/java/org/apache/phoenix/end2end/SortOrderIT.java
+++ b/phoenix-core/src/it/java/org/apache/phoenix/end2end/SortOrderIT.java
@@ -41,8 +41,6 @@ import org.apache.commons.lang.ArrayUtils;
 import org.apache.phoenix.schema.SortOrder;
 import org.apache.phoenix.schema.types.PDataType;
 import org.apache.phoenix.schema.types.PDecimal;
-import org.apache.phoenix.schema.types.PDouble;
-import org.apache.phoenix.schema.types.PFloat;
 import org.apache.phoenix.util.PropertiesUtil;
 import org.junit.Assert;
 import org.junit.Test;
@@ -433,7 +431,7 @@ public class SortOrderIT extends BaseHBaseManagedTimeIT {
     public void testNonPKCompare() throws Exception {
         List<Integer> expectedResults = Lists.newArrayList(2,3,4);
         Integer[] saltBuckets = new Integer[] {null,3};
-        PDataType[] dataTypes = new PDataType[] {PDecimal.INSTANCE, 
PDouble.INSTANCE, PFloat.INSTANCE};
+        PDataType[] dataTypes = new PDataType[] {PDecimal.INSTANCE};
         for (Integer saltBucket : saltBuckets) {
             for (PDataType dataType : dataTypes) {
                 for (SortOrder sortOrder : SortOrder.values()) {
@@ -449,7 +447,7 @@ public class SortOrderIT extends BaseHBaseManagedTimeIT {
         List<Integer> rExpectedResults = new ArrayList<>(expectedResults);
         Collections.reverse(rExpectedResults);
         Integer[] saltBuckets = new Integer[] {null,3};
-        PDataType[] dataTypes = new PDataType[] {PDecimal.INSTANCE, 
PDouble.INSTANCE, PFloat.INSTANCE};
+        PDataType[] dataTypes = new PDataType[] {PDecimal.INSTANCE};
         for (Integer saltBucket : saltBuckets) {
             for (PDataType dataType : dataTypes) {
                 for (SortOrder sortOrder : SortOrder.values()) {
@@ -678,8 +676,13 @@ public class SortOrderIT extends BaseHBaseManagedTimeIT {
                 return ">";
             } else if (operator.equals(">")) {
                 return "<";
+            } else if (operator.equals(">=")) {
+                return "<=";
+            } else if (operator.equals("<=")) {
+                return ">=";
+            } else {
+                return operator;
             }
-            return operator;
         }
     }
     

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java 
b/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
index aee5f63..2a032a3 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
@@ -37,6 +37,7 @@ import org.apache.phoenix.schema.RowKeySchema;
 import org.apache.phoenix.schema.SaltingUtil;
 import org.apache.phoenix.util.ByteUtil;
 import org.apache.phoenix.util.ScanUtil;
+import org.apache.phoenix.util.ScanUtil.BytesComparator;
 import org.apache.phoenix.util.SchemaUtil;
 
 import com.google.common.collect.ImmutableList;
@@ -81,10 +82,12 @@ public class ScanRanges {
                         stripPrefix(minMaxRange.getUpperRange(),offset), 
                         minMaxRange.upperUnbound());
             }
+            // We have full keys here, so use field from our varbinary schema
+            BytesComparator comparator = 
ScanUtil.getComparator(SchemaUtil.VAR_BINARY_SCHEMA.getField(0));
             for (byte[] key : keys) {
                 // Filter now based on unsalted minMaxRange and ignore the 
point key salt byte
-                if ( unsaltedMinMaxRange.compareLowerToUpperBound(key, offset, 
key.length-offset, true) <= 0 &&
-                     unsaltedMinMaxRange.compareUpperToLowerBound(key, offset, 
key.length-offset, true) >= 0) {
+                if ( unsaltedMinMaxRange.compareLowerToUpperBound(key, offset, 
key.length-offset, true, comparator) <= 0 &&
+                     unsaltedMinMaxRange.compareUpperToLowerBound(key, offset, 
key.length-offset, true, comparator) >= 0) {
                     keyRanges.add(KeyRange.getKeyRange(key));
                 }
             }

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisons.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisons.java
 
b/phoenix-core/src/main/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisons.java
index 40960e0..67d23fc 100644
--- 
a/phoenix-core/src/main/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisons.java
+++ 
b/phoenix-core/src/main/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisons.java
@@ -90,6 +90,12 @@ public class DescVarLengthFastByteComparisons {
             public int compareTo(byte[] buffer1, int offset1, int length1, 
byte[] buffer2, int offset2, int length2) {
                 // Short circuit equal case
                 if (buffer1 == buffer2 && offset1 == offset2 && length1 == 
length2) { return 0; }
+                if (length1 == 0 && length2 != 0) { // nulls sort first, even 
for descending
+                    return -1; 
+                } 
+                if (length2 == 0 && length1 != 0) { // nulls sort first, even 
for descending
+                    return 1; 
+                }
                 // Bring WritableComparator code local
                 int end1 = offset1 + length1;
                 int end2 = offset2 + length2;
@@ -166,6 +172,12 @@ public class DescVarLengthFastByteComparisons {
             public int compareTo(byte[] buffer1, int offset1, int length1, 
byte[] buffer2, int offset2, int length2) {
                 // Short circuit equal case
                 if (buffer1 == buffer2 && offset1 == offset2 && length1 == 
length2) { return 0; }
+                if (length1 == 0 && length2 != 0) { // nulls sort first, even 
for descending
+                    return -1; 
+                }
+                if (length2 == 0 && length1 != 0) { // nulls sort first, even 
for descending
+                    return 1; 
+                }
                 int minLength = Math.min(length1, length2);
                 int minWords = minLength / Longs.BYTES;
                 int offset1Adj = offset1 + BYTE_ARRAY_BASE_OFFSET;

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/filter/SkipScanFilter.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/filter/SkipScanFilter.java 
b/phoenix-core/src/main/java/org/apache/phoenix/filter/SkipScanFilter.java
index 6dc2a2d..d1c8532 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/filter/SkipScanFilter.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/filter/SkipScanFilter.java
@@ -40,6 +40,7 @@ import org.apache.phoenix.query.KeyRange.Bound;
 import org.apache.phoenix.schema.RowKeySchema;
 import org.apache.phoenix.util.ByteUtil;
 import org.apache.phoenix.util.ScanUtil;
+import org.apache.phoenix.util.ScanUtil.BytesComparator;
 import org.apache.phoenix.util.SchemaUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -210,7 +211,7 @@ public class SkipScanFilter extends FilterBase implements 
Writable {
         if (!lowerUnbound) {
             // Find the position of the first slot of the lower range
             schema.next(ptr, 0, schema.iterator(lowerInclusiveKey,ptr), 
slotSpan[0]);
-            startPos = 
ScanUtil.searchClosestKeyRangeWithUpperHigherThanPtr(slots.get(0), ptr, 0);
+            startPos = 
ScanUtil.searchClosestKeyRangeWithUpperHigherThanPtr(slots.get(0), ptr, 0, 
schema.getField(0));
             // Lower range is past last upper range of first slot, so cannot 
possibly be in range
             if (startPos >= slots.get(0).size()) {
                 return false;
@@ -221,7 +222,7 @@ public class SkipScanFilter extends FilterBase implements 
Writable {
         if (!upperUnbound) {
             // Find the position of the first slot of the upper range
             schema.next(ptr, 0, schema.iterator(upperExclusiveKey,ptr), 
slotSpan[0]);
-            endPos = 
ScanUtil.searchClosestKeyRangeWithUpperHigherThanPtr(slots.get(0), ptr, 
startPos);
+            endPos = 
ScanUtil.searchClosestKeyRangeWithUpperHigherThanPtr(slots.get(0), ptr, 
startPos, schema.getField(0));
             // Upper range lower than first lower range of first slot, so 
cannot possibly be in range
 //            if (endPos == 0 && Bytes.compareTo(upperExclusiveKey, 
slots.get(0).get(0).getLowerRange()) <= 0) {
 //                return false;
@@ -230,7 +231,7 @@ public class SkipScanFilter extends FilterBase implements 
Writable {
             if (endPos >= slots.get(0).size()) {
                 upperUnbound = true;
                 endPos = slots.get(0).size()-1;
-            } else if 
(slots.get(0).get(endPos).compareLowerToUpperBound(upperExclusiveKey) >= 0) {
+            } else if 
(slots.get(0).get(endPos).compareLowerToUpperBound(upperExclusiveKey, 
ScanUtil.getComparator(schema.getField(0))) >= 0) {
                 // We know that the endPos range is higher than the previous 
range, but we need
                 // to test if it ends before the next range starts.
                 endPos--;
@@ -397,8 +398,10 @@ public class SkipScanFilter extends FilterBase implements 
Writable {
         int maxOffset = schema.iterator(currentKey, minOffset, length, ptr);
         schema.next(ptr, ScanUtil.getRowKeyPosition(slotSpan, i), maxOffset, 
slotSpan[i]);
         while (true) {
+            // Comparator depends on field in schema
+            BytesComparator comparator = 
ScanUtil.getComparator(schema.getField(ScanUtil.getRowKeyPosition(slotSpan, 
i)));
             // Increment to the next range while the upper bound of our 
current slot is less than our current key
-            while (position[i] < slots.get(i).size() && 
slots.get(i).get(position[i]).compareUpperToLowerBound(ptr) < 0) {
+            while (position[i] < slots.get(i).size() && 
slots.get(i).get(position[i]).compareUpperToLowerBound(ptr, comparator) < 0) {
                 position[i]++;
             }
             Arrays.fill(position, i+1, position.length, 0);
@@ -448,7 +451,7 @@ public class SkipScanFilter extends FilterBase implements 
Writable {
                     ByteUtil.nextKey(startKey, currentLength);
                 }
                 i = j;
-            } else if 
(slots.get(i).get(position[i]).compareLowerToUpperBound(ptr) > 0) {
+            } else if 
(slots.get(i).get(position[i]).compareLowerToUpperBound(ptr, comparator) > 0) {
                 // Our current key is less than the lower range of the current 
position in the current slot.
                 // Seek to the lower range, since it's bigger than the current 
key
                 setStartKey(ptr, minOffset, i, nSlots);

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/query/KeyRange.java
----------------------------------------------------------------------
diff --git a/phoenix-core/src/main/java/org/apache/phoenix/query/KeyRange.java 
b/phoenix-core/src/main/java/org/apache/phoenix/query/KeyRange.java
index 0612046..366a123 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/query/KeyRange.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/query/KeyRange.java
@@ -32,6 +32,7 @@ import org.apache.hadoop.io.Writable;
 import org.apache.hadoop.io.WritableUtils;
 import org.apache.phoenix.schema.SortOrder;
 import org.apache.phoenix.util.ByteUtil;
+import org.apache.phoenix.util.ScanUtil.BytesComparator;
 
 import com.google.common.base.Function;
 import com.google.common.collect.ComparisonChain;
@@ -183,28 +184,28 @@ public class KeyRange implements Writable {
         return isSingleKey;
     }
     
-    public int compareLowerToUpperBound(ImmutableBytesWritable ptr, boolean 
isInclusive) {
-        return compareLowerToUpperBound(ptr.get(), ptr.getOffset(), 
ptr.getLength(), isInclusive);
+    public int compareLowerToUpperBound(ImmutableBytesWritable ptr, boolean 
isInclusive, BytesComparator comparator) {
+        return compareLowerToUpperBound(ptr.get(), ptr.getOffset(), 
ptr.getLength(), isInclusive, comparator);
     }
     
-    public int compareLowerToUpperBound(ImmutableBytesWritable ptr) {
-        return compareLowerToUpperBound(ptr, true);
+    public int compareLowerToUpperBound(ImmutableBytesWritable ptr, 
BytesComparator comparator) {
+        return compareLowerToUpperBound(ptr, true, comparator);
     }
     
-    public int compareUpperToLowerBound(ImmutableBytesWritable ptr, boolean 
isInclusive) {
-        return compareUpperToLowerBound(ptr.get(), ptr.getOffset(), 
ptr.getLength(), isInclusive);
+    public int compareUpperToLowerBound(ImmutableBytesWritable ptr, boolean 
isInclusive, BytesComparator comparator) {
+        return compareUpperToLowerBound(ptr.get(), ptr.getOffset(), 
ptr.getLength(), isInclusive, comparator);
     }
     
-    public int compareUpperToLowerBound(ImmutableBytesWritable ptr) {
-        return compareUpperToLowerBound(ptr, true);
+    public int compareUpperToLowerBound(ImmutableBytesWritable ptr, 
BytesComparator comparator) {
+        return compareUpperToLowerBound(ptr, true, comparator);
     }
     
-    public int compareLowerToUpperBound( byte[] b, int o, int l) {
-        return compareLowerToUpperBound(b,o,l,true);
+    public int compareLowerToUpperBound( byte[] b, int o, int l, 
BytesComparator comparator) {
+        return compareLowerToUpperBound(b,o,l,true, comparator);
     }
 
-    public int compareLowerToUpperBound( byte[] b) {
-        return compareLowerToUpperBound(b,0,b.length);
+    public int compareLowerToUpperBound( byte[] b, BytesComparator comparator) 
{
+        return compareLowerToUpperBound(b,0,b.length, comparator);
     }
 
     /**
@@ -213,15 +214,16 @@ public class KeyRange implements Writable {
      * @param o upper bound offset
      * @param l upper bound length
      * @param isInclusive upper bound inclusive
+     * @param comparator comparator used to do compare the byte array using 
offset and length
      * @return -1 if the lower bound is less than the upper bound,
      *          1 if the lower bound is greater than the upper bound,
      *          and 0 if they are equal.
      */
-    public int compareLowerToUpperBound( byte[] b, int o, int l, boolean 
isInclusive) {
+    public int compareLowerToUpperBound( byte[] b, int o, int l, boolean 
isInclusive, BytesComparator comparator) {
         if (lowerUnbound() || b == KeyRange.UNBOUND) {
             return -1;
         }
-        int cmp = Bytes.compareTo(lowerRange, 0, lowerRange.length, b, o, l);
+        int cmp = comparator.compare(lowerRange, 0, lowerRange.length, b, o, 
l);
         if (cmp > 0) {
             return 1;
         }
@@ -234,19 +236,19 @@ public class KeyRange implements Writable {
         return 1;
     }
     
-    public int compareUpperToLowerBound(byte[] b) {
-        return compareUpperToLowerBound(b,0,b.length);
+    public int compareUpperToLowerBound(byte[] b, BytesComparator comparator) {
+        return compareUpperToLowerBound(b,0,b.length, comparator);
     }
     
-    public int compareUpperToLowerBound(byte[] b, int o, int l) {
-        return compareUpperToLowerBound(b,o,l, true);
+    public int compareUpperToLowerBound(byte[] b, int o, int l, 
BytesComparator comparator) {
+        return compareUpperToLowerBound(b,o,l, true, comparator);
     }
     
-    public int compareUpperToLowerBound(byte[] b, int o, int l, boolean 
isInclusive) {
+    public int compareUpperToLowerBound(byte[] b, int o, int l, boolean 
isInclusive, BytesComparator comparator) {
         if (upperUnbound() || b == KeyRange.UNBOUND) {
             return 1;
         }
-        int cmp = Bytes.compareTo(upperRange, 0, upperRange.length, b, o, l);
+        int cmp = comparator.compare(upperRange, 0, upperRange.length, b, o, 
l);
         if (cmp > 0) {
             return 1;
         }

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/schema/types/PDataType.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/schema/types/PDataType.java 
b/phoenix-core/src/main/java/org/apache/phoenix/schema/types/PDataType.java
index 43bab0e..d79de60 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/schema/types/PDataType.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/schema/types/PDataType.java
@@ -36,6 +36,7 @@ import org.apache.phoenix.schema.ConstraintViolationException;
 import org.apache.phoenix.schema.IllegalDataException;
 import org.apache.phoenix.schema.SortOrder;
 import org.apache.phoenix.util.ByteUtil;
+import org.apache.phoenix.util.ScanUtil;
 
 import com.google.common.base.Preconditions;
 import com.google.common.math.LongMath;
@@ -762,7 +763,7 @@ public abstract class PDataType<T> implements DataType<T>, 
Comparable<PDataType<
             }
             return (length1 - length2);
         }
-        return Bytes.compareTo(ba1, offset1, length1, ba2, offset2, length2) * 
(so1 == SortOrder.DESC ? -1 : 1);
+        return (so1 == SortOrder.DESC ? -1 : 1) * 
ScanUtil.getComparator(length1 == length2, so1).compare(ba1, offset1, length1, 
ba2, offset2, length2);
     }
 
     public final int compareTo(ImmutableBytesWritable ptr1, SortOrder 
ptr1SortOrder, ImmutableBytesWritable ptr2,

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/util/ScanUtil.java
----------------------------------------------------------------------
diff --git a/phoenix-core/src/main/java/org/apache/phoenix/util/ScanUtil.java 
b/phoenix-core/src/main/java/org/apache/phoenix/util/ScanUtil.java
index 3b7ed4a..7b76a2b 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/util/ScanUtil.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/util/ScanUtil.java
@@ -39,6 +39,7 @@ import org.apache.hadoop.hbase.filter.FilterList;
 import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
 import org.apache.hadoop.hbase.io.TimeRange;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.io.WritableComparator;
 import org.apache.phoenix.compile.OrderByCompiler.OrderBy;
 import org.apache.phoenix.compile.ScanRanges;
 import org.apache.phoenix.compile.StatementContext;
@@ -57,6 +58,7 @@ import org.apache.phoenix.query.QueryServicesOptions;
 import org.apache.phoenix.schema.IllegalDataException;
 import org.apache.phoenix.schema.PName;
 import org.apache.phoenix.schema.RowKeySchema;
+import org.apache.phoenix.schema.SortOrder;
 import org.apache.phoenix.schema.ValueSchema.Field;
 import org.apache.phoenix.schema.types.PDataType;
 import org.apache.phoenix.schema.types.PVarbinary;
@@ -285,7 +287,15 @@ public class ScanUtil {
         for (int i = 0; i < position.length; i++) {
             position[i] = bound == Bound.LOWER ? 0 : slots.get(i).size()-1;
             KeyRange range = slots.get(i).get(position[i]);
-            maxLength += range.getRange(bound).length + (schema.getField(i + 
slotSpan[i]).getDataType().isFixedWidth() ? 0 : 1);
+            Field field = schema.getField(i + slotSpan[i]);
+            int keyLength = range.getRange(bound).length;
+            if (!field.getDataType().isFixedWidth()) {
+                keyLength++;
+                if (range.isUnbound(bound) && !range.isInclusive(bound) && 
field.getSortOrder() == SortOrder.DESC) {
+                    keyLength++;
+                }
+            }
+            maxLength += keyLength;
         }
         byte[] key = new byte[maxLength];
         int length = setKey(schema, slots, slotSpan, position, bound, key, 0, 
0, position.length);
@@ -379,8 +389,8 @@ public class ScanUtil {
             // key slots would cause the flag to become true.
             lastInclusiveUpperSingleKey = range.isSingleKey() && 
inclusiveUpper;
             anyInclusiveUpperRangeKey |= !range.isSingleKey() && 
inclusiveUpper;
-            // A match for IS NULL or IS NOT NULL should not have a 
DESC_SEPARATOR_BYTE as nulls sort first
-            byte sepByte = 
SchemaUtil.getSeparatorByte(schema.rowKeyOrderOptimizable(), bytes.length == 0 
|| range == KeyRange.IS_NULL_RANGE || range == KeyRange.IS_NOT_NULL_RANGE, 
field);
+            // A null or empty byte array is always represented as a zero byte
+            byte sepByte = 
SchemaUtil.getSeparatorByte(schema.rowKeyOrderOptimizable(), bytes.length == 0, 
field);
             
             if ( !isFixedWidth && ( sepByte == 
QueryConstants.DESC_SEPARATOR_BYTE 
                                     || ( !exclusiveUpper 
@@ -399,7 +409,7 @@ public class ScanUtil {
             // If we are setting the lower bound with an exclusive range key, 
we need to bump the
             // slot up for each key part. For an upper bound, we bump up an 
inclusive key, but
             // only after the last key part.
-            if (!range.isSingleKey() && exclusiveLower) {
+            if (exclusiveLower) {
                 if (!ByteUtil.nextKey(key, offset)) {
                     // Special case for not being able to increment.
                     // In this case we return a negative byteOffset to
@@ -408,6 +418,14 @@ public class ScanUtil {
                     // have an end key specified.
                     return -byteOffset;
                 }
+                // We're filtering on values being non null here, but we still 
need the 0xFF
+                // terminator, since DESC keys ignore the last byte as it's 
expected to be 
+                // the terminator. Without this, we'd ignore the separator 
byte that was
+                // just added and incremented.
+                if (!isFixedWidth && bytes.length == 0 
+                    && 
SchemaUtil.getSeparatorByte(schema.rowKeyOrderOptimizable(), false, field) == 
QueryConstants.DESC_SEPARATOR_BYTE) {
+                    key[offset++] = QueryConstants.DESC_SEPARATOR_BYTE;
+                }
             }
             
             fieldIndex += slotSpan[i] + 1;
@@ -427,7 +445,8 @@ public class ScanUtil {
         // byte.
         if (bound == Bound.LOWER) {
             while (--i >= schemaStartIndex && offset > byteOffset && 
-                    
!schema.getField(--fieldIndex).getDataType().isFixedWidth() && 
+                    
!(field=schema.getField(--fieldIndex)).getDataType().isFixedWidth() && 
+                    field.getSortOrder() == SortOrder.ASC &&
                     key[offset-1] == QueryConstants.SEPARATOR_BYTE) {
                 offset--;
                 fieldIndex -= slotSpan[i];
@@ -435,19 +454,47 @@ public class ScanUtil {
         }
         return offset - byteOffset;
     }
+    
+    public static interface BytesComparator {
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int 
l2);
+    };
 
+    private static final BytesComparator DESC_VAR_WIDTH_COMPARATOR = new 
BytesComparator() {
+
+        @Override
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int 
l2) {
+            return DescVarLengthFastByteComparisons.compareTo(b1, s1, l1, b2, 
s2, l2);
+        }
+        
+    };
+    
+    private static final BytesComparator ASC_FIXED_WIDTH_COMPARATOR = new 
BytesComparator() {
+
+        @Override
+        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int 
l2) {
+            return WritableComparator.compareBytes(b1, s1, l1, b2, s2, l2);
+        }
+        
+    };
+    public static BytesComparator getComparator(boolean isFixedWidth, 
SortOrder sortOrder) {
+        return isFixedWidth || sortOrder == SortOrder.ASC ? 
ASC_FIXED_WIDTH_COMPARATOR : DESC_VAR_WIDTH_COMPARATOR;
+    }
+    public static BytesComparator getComparator(Field field) {
+        return 
getComparator(field.getDataType().isFixedWidth(),field.getSortOrder());
+    }
     /**
      * Perform a binary lookup on the list of KeyRange for the tightest slot 
such that the slotBound
      * of the current slot is higher or equal than the slotBound of our range. 
      * @return  the index of the slot whose slot bound equals or are the 
tightest one that is 
      *          smaller than rangeBound of range, or slots.length if no bound 
can be found.
      */
-    public static int 
searchClosestKeyRangeWithUpperHigherThanPtr(List<KeyRange> slots, 
ImmutableBytesWritable ptr, int lower) {
+    public static int 
searchClosestKeyRangeWithUpperHigherThanPtr(List<KeyRange> slots, 
ImmutableBytesWritable ptr, int lower, Field field) {
         int upper = slots.size() - 1;
         int mid;
+        BytesComparator comparator = 
ScanUtil.getComparator(field.getDataType().isFixedWidth(), 
field.getSortOrder());
         while (lower <= upper) {
             mid = (lower + upper) / 2;
-            int cmp = slots.get(mid).compareUpperToLowerBound(ptr, true);
+            int cmp = slots.get(mid).compareUpperToLowerBound(ptr, true, 
comparator);
             if (cmp < 0) {
                 lower = mid + 1;
             } else if (cmp > 0) {
@@ -457,7 +504,7 @@ public class ScanUtil {
             }
         }
         mid = (lower + upper) / 2;
-        if (mid == 0 && slots.get(mid).compareUpperToLowerBound(ptr, true) > 
0) {
+        if (mid == 0 && slots.get(mid).compareUpperToLowerBound(ptr, true, 
comparator) > 0) {
             return mid;
         } else {
             return ++mid;

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/main/java/org/apache/phoenix/util/SchemaUtil.java
----------------------------------------------------------------------
diff --git a/phoenix-core/src/main/java/org/apache/phoenix/util/SchemaUtil.java 
b/phoenix-core/src/main/java/org/apache/phoenix/util/SchemaUtil.java
index d01bf39..5414d4f 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/util/SchemaUtil.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/util/SchemaUtil.java
@@ -625,7 +625,7 @@ public class SchemaUtil {
     }
 
     public static int getMaxKeyLength(RowKeySchema schema, 
List<List<KeyRange>> slots) {
-        int maxKeyLength = getTerminatorCount(schema);
+        int maxKeyLength = getTerminatorCount(schema) * 2;
         for (List<KeyRange> slot : slots) {
             int maxSlotLength = 0;
             for (KeyRange range : slot) {

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java 
b/phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java
index 93e7823..9344323 100644
--- 
a/phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java
+++ 
b/phoenix-core/src/test/java/org/apache/phoenix/compile/WhereOptimizerTest.java
@@ -32,6 +32,7 @@ import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import java.math.BigDecimal;
 import java.sql.Connection;
 import java.sql.Date;
 import java.sql.DriverManager;
@@ -56,9 +57,12 @@ import org.apache.phoenix.query.BaseConnectionlessQueryTest;
 import org.apache.phoenix.query.KeyRange;
 import org.apache.phoenix.query.QueryConstants;
 import org.apache.phoenix.schema.ColumnNotFoundException;
+import org.apache.phoenix.schema.SortOrder;
 import org.apache.phoenix.schema.types.PChar;
 import org.apache.phoenix.schema.types.PDate;
+import org.apache.phoenix.schema.types.PDecimal;
 import org.apache.phoenix.schema.types.PInteger;
+import org.apache.phoenix.schema.types.PLong;
 import org.apache.phoenix.schema.types.PUnsignedLong;
 import org.apache.phoenix.schema.types.PVarchar;
 import org.apache.phoenix.util.ByteUtil;
@@ -144,6 +148,22 @@ public class WhereOptimizerTest extends 
BaseConnectionlessQueryTest {
         assertArrayEquals(tmpBytes2, scan.getStartRow());
         assertArrayEquals(tmpBytes3, scan.getStopRow());
     }
+    
+    @Test
+    public void testDescDecimalRange() throws SQLException {
+        String ddl = "create table t (k1 bigint not null, k2 decimal, 
constraint pk primary key (k1,k2 desc))";
+        Connection conn = DriverManager.getConnection(getUrl(), 
PropertiesUtil.deepCopy(TEST_PROPERTIES));
+        conn.createStatement().execute(ddl);
+        String query = "select * from t where k1 in (1,2) and k2>1.0";
+        Scan scan = compileStatement(query).getScan();
+
+        byte[] startRow = ByteUtil.concat(PLong.INSTANCE.toBytes(1), 
ByteUtil.nextKey(QueryConstants.SEPARATOR_BYTE_ARRAY), 
QueryConstants.DESC_SEPARATOR_BYTE_ARRAY);
+        byte[] upperValue = PDecimal.INSTANCE.toBytes(BigDecimal.valueOf(1.0));
+        byte[] stopRow = ByteUtil.concat(PLong.INSTANCE.toBytes(2), 
SortOrder.invert(upperValue,0,upperValue.length), 
QueryConstants.DESC_SEPARATOR_BYTE_ARRAY);
+        assertTrue(scan.getFilter() instanceof SkipScanFilter);
+        assertArrayEquals(startRow, scan.getStartRow());
+        assertArrayEquals(stopRow, scan.getStopRow());
+    }
 
     @Test
     public void testSingleCharPaddedKeyExpression() throws SQLException {

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/test/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisonsTest.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/test/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisonsTest.java
 
b/phoenix-core/src/test/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisonsTest.java
new file mode 100644
index 0000000..106471b
--- /dev/null
+++ 
b/phoenix-core/src/test/java/org/apache/phoenix/execute/DescVarLengthFastByteComparisonsTest.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.phoenix.execute;
+
+import static org.junit.Assert.assertTrue;
+
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.phoenix.util.ByteUtil;
+import org.junit.Test;
+
+public class DescVarLengthFastByteComparisonsTest {
+    
+    @Test
+    public void testNullIsSmallest() {
+        byte[] b1 = ByteUtil.EMPTY_BYTE_ARRAY;
+        byte[] b2 = Bytes.toBytes("a");
+        int cmp = DescVarLengthFastByteComparisons.compareTo(b1, 0, b1.length, 
b2, 0, b2.length);
+        assertTrue(cmp < 0);
+        cmp = DescVarLengthFastByteComparisons.compareTo(b2, 0, b2.length, b1, 
0, b1.length);
+        assertTrue(cmp > 0);
+    }
+    
+    @Test
+    public void testShorterSubstringIsBigger() {
+        byte[] b1 = Bytes.toBytes("ab");
+        byte[] b2 = Bytes.toBytes("a");
+        int cmp = DescVarLengthFastByteComparisons.compareTo(b1, 0, b1.length, 
b2, 0, b2.length);
+        assertTrue(cmp < 0);
+    }
+}

http://git-wip-us.apache.org/repos/asf/phoenix/blob/ac2b2083/phoenix-core/src/test/java/org/apache/phoenix/expression/SortOrderExpressionTest.java
----------------------------------------------------------------------
diff --git 
a/phoenix-core/src/test/java/org/apache/phoenix/expression/SortOrderExpressionTest.java
 
b/phoenix-core/src/test/java/org/apache/phoenix/expression/SortOrderExpressionTest.java
index b9ee0eb..e2ab684 100644
--- 
a/phoenix-core/src/test/java/org/apache/phoenix/expression/SortOrderExpressionTest.java
+++ 
b/phoenix-core/src/test/java/org/apache/phoenix/expression/SortOrderExpressionTest.java
@@ -292,17 +292,20 @@ public class SortOrderExpressionTest {
     }
     
     private void runCompareTest(CompareOp op, boolean expectedResult, Object 
lhsValue, PDataType lhsDataType, Object rhsValue, PDataType rhsDataType) throws 
Exception {
-        List<Expression> args = Lists.newArrayList(getLiteral(lhsValue, 
lhsDataType), getLiteral(rhsValue, rhsDataType));
-        evaluateAndAssertResult(new ComparisonExpression(args, op), 
expectedResult, "lhsDataType: " + lhsDataType + " rhsDataType: " + rhsDataType);
+        List<Expression> args;
+        ImmutableBytesWritable ptr = new ImmutableBytesWritable();
+
+        args = Lists.newArrayList(getLiteral(lhsValue, lhsDataType), 
getLiteral(rhsValue, rhsDataType));
+        evaluateAndAssertResult(ComparisonExpression.create(op, args, ptr, 
true), expectedResult, "lhsDataType: " + lhsDataType + " rhsDataType: " + 
rhsDataType);
         
         args = Lists.newArrayList(getInvertedLiteral(lhsValue, lhsDataType), 
getLiteral(rhsValue, rhsDataType));
-        evaluateAndAssertResult(new ComparisonExpression(args, op), 
expectedResult, "lhs (inverted) dataType: " + lhsDataType + " rhsDataType: " + 
rhsDataType);
+        evaluateAndAssertResult(ComparisonExpression.create(op, args, ptr, 
true), expectedResult, "lhs (inverted) dataType: " + lhsDataType + " 
rhsDataType: " + rhsDataType);
         
         args = Lists.newArrayList(getLiteral(lhsValue, lhsDataType), 
getInvertedLiteral(rhsValue, rhsDataType));
-        evaluateAndAssertResult(new ComparisonExpression(args, op), 
expectedResult, "lhsDataType: " + lhsDataType + " rhs (inverted) dataType: " + 
rhsDataType);
+        evaluateAndAssertResult(ComparisonExpression.create(op, args, ptr, 
true), expectedResult, "lhsDataType: " + lhsDataType + " rhs (inverted) 
dataType: " + rhsDataType);
         
         args = Lists.newArrayList(getInvertedLiteral(lhsValue, lhsDataType), 
getInvertedLiteral(rhsValue, rhsDataType));
-        evaluateAndAssertResult(new ComparisonExpression(args, op), 
expectedResult, "lhs (inverted) dataType: " + lhsDataType + " rhs (inverted) 
dataType: " + rhsDataType);                
+        evaluateAndAssertResult(ComparisonExpression.create(op, args, ptr, 
true), expectedResult, "lhs (inverted) dataType: " + lhsDataType + " rhs 
(inverted) dataType: " + rhsDataType);                
     }
     
     private void evaluateAndAssertResult(Expression expression, Object 
expectedResult) {

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