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jmalkin pushed a commit to branch java_version_update
in repository https://gitbox.apache.org/repos/asf/datasketches-hive.git

commit 6255f0f35fca64cd8fd70ea3fc3858eba98e55a6
Author: Jon <[email protected]>
AuthorDate: Fri May 10 22:53:04 2024 -0700

    Make main code use ds-java 6.0.0 API
---
 .../hive/frequencies/DataToItemsSketchUDAF.java    |  2 +-
 .../hive/frequencies/DataToStringsSketchUDAF.java  |  2 +-
 .../GetFrequentItemsFromStringsSketchUDTF.java     |  2 +-
 .../hive/frequencies/ItemsEvaluator.java           |  2 +-
 .../datasketches/hive/frequencies/ItemsState.java  |  2 +-
 .../hive/frequencies/UnionItemsSketchUDAF.java     |  2 +-
 .../hive/frequencies/UnionStringsSketchUDAF.java   |  2 +-
 .../apache/datasketches/hive/kll/SketchState.java  |  4 ++--
 .../hive/quantiles/DataToItemsSketchUDAF.java      |  6 +++---
 .../hive/quantiles/DataToStringsSketchUDAF.java    |  4 ++--
 .../hive/quantiles/DoublesUnionState.java          |  2 +-
 .../hive/quantiles/GetCdfFromStringsSketchUDF.java |  3 ++-
 .../hive/quantiles/GetKFromStringsSketchUDF.java   |  3 ++-
 .../hive/quantiles/GetNFromStringsSketchUDF.java   |  3 ++-
 .../hive/quantiles/GetPmfFromStringsSketchUDF.java |  3 ++-
 .../quantiles/GetQuantileFromStringsSketchUDF.java |  3 ++-
 .../GetQuantilesFromDoublesSketchUDF.java          | 20 +++++++++++++++++-
 .../GetQuantilesFromStringsSketchUDF.java          | 24 ++++++++++++++++++++--
 .../hive/quantiles/ItemsEvaluator.java             |  8 +++++---
 .../hive/quantiles/ItemsUnionState.java            | 16 ++++++++-------
 .../hive/quantiles/StringsSketchToStringUDF.java   |  3 ++-
 .../hive/quantiles/UnionItemsSketchUDAF.java       |  6 +++---
 .../hive/quantiles/UnionStringsSketchUDAF.java     |  4 ++--
 .../tuple/DoubleSummarySketchToEstimatesUDF.java   |  4 ++--
 .../tuple/DoubleSummarySketchToPercentileUDF.java  |  4 ++--
 .../frequencies/DataToStringsSketchUDAFTest.java   |  4 ++--
 .../GetFrequentItemsFromStringsSketchUDTFTest.java |  4 ++--
 .../frequencies/UnionStringsSketchUDAFTest.java    |  4 ++--
 .../quantiles/DataToStringsSketchUDAFTest.java     |  4 ++--
 .../quantiles/GetCdfFromStringsSketchUDFTest.java  |  4 ++--
 .../quantiles/GetKFromStringsSketchUDFTest.java    |  4 ++--
 .../quantiles/GetNFromStringsSketchUDFTest.java    |  4 ++--
 .../quantiles/GetPmfFromStringsSketchUDFTest.java  |  4 ++--
 .../GetQuantileFromStringsSketchUDFTest.java       |  6 +++---
 .../GetQuantilesFromStringsSketchUDFTest.java      |  6 +++---
 .../quantiles/StringsSketchToStringUDFTest.java    |  4 ++--
 .../hive/quantiles/UnionStringsSketchUDAFTest.java |  4 ++--
 37 files changed, 117 insertions(+), 69 deletions(-)

diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/DataToItemsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/frequencies/DataToItemsSketchUDAF.java
index 6b17ef1..9aa411c 100644
--- 
a/src/main/java/org/apache/datasketches/hive/frequencies/DataToItemsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/frequencies/DataToItemsSketchUDAF.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAF.java
index ab0156f..6f7e204 100644
--- 
a/src/main/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAF.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.hadoop.hive.common.type.HiveChar;
 import org.apache.hadoop.hive.common.type.HiveVarchar;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTF.java
 
b/src/main/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTF.java
index 2673677..87c3879 100644
--- 
a/src/main/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.frequencies;
 
 import java.util.Arrays;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.frequencies.ErrorType;
 import org.apache.datasketches.frequencies.ItemsSketch;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/ItemsEvaluator.java 
b/src/main/java/org/apache/datasketches/hive/frequencies/ItemsEvaluator.java
index c3154a4..321f153 100644
--- a/src/main/java/org/apache/datasketches/hive/frequencies/ItemsEvaluator.java
+++ b/src/main/java/org/apache/datasketches/hive/frequencies/ItemsEvaluator.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.datasketches.frequencies.ItemsSketch;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.memory.Memory;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/ItemsState.java 
b/src/main/java/org/apache/datasketches/hive/frequencies/ItemsState.java
index 08d0243..d267d2f 100644
--- a/src/main/java/org/apache/datasketches/hive/frequencies/ItemsState.java
+++ b/src/main/java/org/apache/datasketches/hive/frequencies/ItemsState.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.datasketches.frequencies.ItemsSketch;
 import org.apache.datasketches.memory.Memory;
 import 
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/UnionItemsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/frequencies/UnionItemsSketchUDAF.java
index b91270f..eed29bf 100644
--- 
a/src/main/java/org/apache/datasketches/hive/frequencies/UnionItemsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/frequencies/UnionItemsSketchUDAF.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
diff --git 
a/src/main/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAF.java
index 229f38a..29ccd48 100644
--- 
a/src/main/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAF.java
@@ -19,7 +19,7 @@
 
 package org.apache.datasketches.hive.frequencies;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
 
diff --git a/src/main/java/org/apache/datasketches/hive/kll/SketchState.java 
b/src/main/java/org/apache/datasketches/hive/kll/SketchState.java
index 667183e..5da420b 100644
--- a/src/main/java/org/apache/datasketches/hive/kll/SketchState.java
+++ b/src/main/java/org/apache/datasketches/hive/kll/SketchState.java
@@ -28,11 +28,11 @@ class SketchState extends AbstractAggregationBuffer {
 
   // initialization is needed in the first phase (iterate) only
   void init() {
-    this.state_ = new KllFloatsSketch();
+    this.state_ = KllFloatsSketch.newHeapInstance();
   }
 
   void init(final int k) {
-    this.state_ = new KllFloatsSketch(k);
+    this.state_ = KllFloatsSketch.newHeapInstance(k);
   }
 
   boolean isInitialized() {
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/DataToItemsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/DataToItemsSketchUDAF.java
index d95b195..3c050be 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/DataToItemsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/DataToItemsSketchUDAF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
 import org.apache.hadoop.hive.ql.parse.SemanticException;
@@ -56,8 +56,8 @@ public abstract class DataToItemsSketchUDAF<T> extends 
AbstractGenericUDAFResolv
 
   public static abstract class DataToSketchEvaluator<T> extends 
ItemsEvaluator<T> {
 
-    DataToSketchEvaluator(final Comparator<? super T> comparator, final 
ArrayOfItemsSerDe<T> serDe) {
-      super(comparator, serDe);
+    DataToSketchEvaluator(final Class<T> clazz, final Comparator<? super T> 
comparator, final ArrayOfItemsSerDe<T> serDe) {
+      super(clazz, comparator, serDe);
     }
 
     @Override
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAF.java
index be5874e..f45091f 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.hadoop.hive.common.type.HiveChar;
 import org.apache.hadoop.hive.common.type.HiveVarchar;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -45,7 +45,7 @@ public class DataToStringsSketchUDAF extends 
DataToItemsSketchUDAF<String> {
   static class DataToStringsSketchEvaluator extends 
DataToSketchEvaluator<String> {
 
     DataToStringsSketchEvaluator() {
-      super(Comparator.naturalOrder(), new ArrayOfStringsSerDe());
+      super(String.class, Comparator.naturalOrder(), new 
ArrayOfStringsSerDe());
     }
 
     @Override
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/DoublesUnionState.java 
b/src/main/java/org/apache/datasketches/hive/quantiles/DoublesUnionState.java
index cb6f03c..79aa40e 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/DoublesUnionState.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/DoublesUnionState.java
@@ -52,7 +52,7 @@ class DoublesUnionState extends AbstractAggregationBuffer {
     if (this.union == null) {
       this.union = DoublesUnion.heapify(incomingSketch);
     } else {
-      this.union.update(incomingSketch);
+      this.union.union(incomingSketch);
     }
   }
 
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDF.java
index c6944ae..37c8a19 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDF.java
@@ -22,7 +22,7 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Comparator;
 import java.util.List;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -52,6 +52,7 @@ public class GetCdfFromStringsSketchUDF extends UDF {
   public List<Double> evaluate(final BytesWritable serializedSketch, final 
String... splitPoints) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDF.java
index 8ad8591..90ea91b 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -41,6 +41,7 @@ public class GetKFromStringsSketchUDF extends UDF {
   public Integer evaluate(final BytesWritable serializedSketch) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDF.java
index 533282b..236de7e 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -42,6 +42,7 @@ public class GetNFromStringsSketchUDF extends UDF {
   public Long evaluate(final BytesWritable serializedSketch) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDF.java
index 5b17704..5f5ab5a 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDF.java
@@ -22,7 +22,7 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Comparator;
 import java.util.List;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -52,6 +52,7 @@ public class GetPmfFromStringsSketchUDF extends UDF {
   public List<Double> evaluate(final BytesWritable serializedSketch, final 
String... splitPoints) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDF.java
index 85f6f78..5acad31 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -47,6 +47,7 @@ public class GetQuantileFromStringsSketchUDF extends UDF {
   public String evaluate(final BytesWritable serializedSketch, final double 
fraction) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromDoublesSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromDoublesSketchUDF.java
index c04f768..98169b5 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromDoublesSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromDoublesSketchUDF.java
@@ -64,7 +64,25 @@ public class GetQuantilesFromDoublesSketchUDF extends UDF {
   public List<Double> evaluate(final BytesWritable serializedSketch, final int 
number) {
     if (serializedSketch == null) { return null; }
     final DoublesSketch sketch = 
DoublesSketch.wrap(BytesWritableHelper.wrapAsMemory(serializedSketch));
-    final double[] quantiles = sketch.getQuantiles(number);
+
+    double[] quantiles = null;
+    if (number == 1) {
+      quantiles = new double[1];
+      quantiles[0] = sketch.getMinItem();
+    } else if (number == 2) {
+      quantiles = new double[2];
+      quantiles[0] = sketch.getMinItem();
+      quantiles[1] = sketch.getMaxItem();
+    } else if (number > 2) {
+      final double[] ranks = new double[number];
+      final double delta = 1.0 / (number - 1);
+      for (int i = 0; i < number; i++) {
+        ranks[i] = i * delta;
+      }
+      quantiles = sketch.getQuantiles(ranks);
+      quantiles[number - 1] = sketch.getMaxItem(); // to ensure the max value 
is exact
+    }
+
     if (quantiles == null) { return null; }
     return Util.primitivesToList(quantiles);
   }
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDF.java
index dd5f07f..49318de 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDF.java
@@ -23,7 +23,7 @@ import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -55,6 +55,7 @@ public class GetQuantilesFromStringsSketchUDF extends UDF {
   public List<String> evaluate(final BytesWritable serializedSketch, final 
Double... fractions) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
@@ -71,11 +72,30 @@ public class GetQuantilesFromStringsSketchUDF extends UDF {
   public List<String> evaluate(final BytesWritable serializedSketch, final int 
number) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
     );
-    final String[] quantiles = sketch.getQuantiles(number);
+
+    String[] quantiles = null;
+    if (number == 1) {
+      quantiles = new String[1];
+      quantiles[0] = sketch.getMinItem();
+    } else if (number == 2) {
+      quantiles = new String[2];
+      quantiles[0] = sketch.getMinItem();
+      quantiles[1] = sketch.getMaxItem();
+    } else if (number > 2) {
+      final double[] ranks = new double[number];
+      final double delta = 1.0 / (number - 1);
+      for (int i = 0; i < number; i++) {
+        ranks[i] = i * delta;
+      }
+      quantiles = sketch.getQuantiles(ranks);
+      quantiles[number - 1] = sketch.getMaxItem(); // to ensure the max value 
is exact
+    }
+
     if (quantiles == null) { return null; }
     return Arrays.asList(quantiles);
   }
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/ItemsEvaluator.java 
b/src/main/java/org/apache/datasketches/hive/quantiles/ItemsEvaluator.java
index 4713974..a9879e0 100644
--- a/src/main/java/org/apache/datasketches/hive/quantiles/ItemsEvaluator.java
+++ b/src/main/java/org/apache/datasketches/hive/quantiles/ItemsEvaluator.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.memory.Memory;
 import org.apache.datasketches.quantiles.ItemsSketch;
@@ -35,12 +35,14 @@ import org.apache.hadoop.io.BytesWritable;
 
 abstract class ItemsEvaluator<T> extends GenericUDAFEvaluator {
 
+  private final Class<T> clazz_;
   private final Comparator<? super T> comparator_;
   private final ArrayOfItemsSerDe<T> serDe_;
   protected PrimitiveObjectInspector inputObjectInspector;
   protected PrimitiveObjectInspector kObjectInspector;
 
-  ItemsEvaluator(final Comparator<? super T> comparator, final 
ArrayOfItemsSerDe<T> serDe) {
+  ItemsEvaluator(final Class<T> clazz, final Comparator<? super T> comparator, 
final ArrayOfItemsSerDe<T> serDe) {
+    this.clazz_ = clazz;
     this.comparator_ = comparator;
     this.serDe_ = serDe;
   }
@@ -100,7 +102,7 @@ abstract class ItemsEvaluator<T> extends 
GenericUDAFEvaluator {
   @SuppressWarnings("deprecation")
   @Override
   public AggregationBuffer getNewAggregationBuffer() throws HiveException {
-    return new ItemsUnionState<>(this.comparator_, this.serDe_);
+    return new ItemsUnionState<>(this.clazz_, this.comparator_, this.serDe_);
   }
 
 }
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/ItemsUnionState.java 
b/src/main/java/org/apache/datasketches/hive/quantiles/ItemsUnionState.java
index b7004d3..6d40ebf 100644
--- a/src/main/java/org/apache/datasketches/hive/quantiles/ItemsUnionState.java
+++ b/src/main/java/org/apache/datasketches/hive/quantiles/ItemsUnionState.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.datasketches.memory.Memory;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.datasketches.quantiles.ItemsUnion;
@@ -29,11 +29,13 @@ import 
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggreg
 
 class ItemsUnionState<T> extends AbstractAggregationBuffer {
 
+  private final Class<T> clazz_;
   private final Comparator<? super T> comparator_;
   private final ArrayOfItemsSerDe<T> serDe_;
   private ItemsUnion<T> union;
 
-  ItemsUnionState(final Comparator<? super T> comparator, final 
ArrayOfItemsSerDe<T> serDe) {
+  ItemsUnionState(final Class<T> clazz, final Comparator<? super T> 
comparator, final ArrayOfItemsSerDe<T> serDe) {
+    this.clazz_ = clazz;
     this.comparator_ = comparator;
     this.serDe_ = serDe;
   }
@@ -41,9 +43,9 @@ class ItemsUnionState<T> extends AbstractAggregationBuffer {
   // initializing is needed only in the first phase (iterate)
   void init(final int k) {
     if (k > 0) {
-      this.union = ItemsUnion.getInstance(k, this.comparator_);
+      this.union = ItemsUnion.getInstance(this.clazz_, k, this.comparator_);
     } else {
-      this.union = ItemsUnion.getInstance(this.comparator_);
+      this.union = ItemsUnion.getInstance(this.clazz_, this.comparator_);
     }
   }
 
@@ -53,18 +55,18 @@ class ItemsUnionState<T> extends AbstractAggregationBuffer {
 
   void update(final T value) {
     if (this.union == null) {
-      this.union = ItemsUnion.getInstance(this.comparator_);
+      this.union = ItemsUnion.getInstance(this.clazz_, this.comparator_);
     }
     this.union.update(value);
   }
 
   void update(final Memory serializedSketch) {
     final ItemsSketch<T> incomingSketch =
-        ItemsSketch.getInstance(serializedSketch, this.comparator_, 
this.serDe_);
+        ItemsSketch.getInstance(this.clazz_, serializedSketch, 
this.comparator_, this.serDe_);
     if (this.union == null) {
       this.union = ItemsUnion.getInstance(incomingSketch);
     } else {
-      this.union.update(incomingSketch);
+      this.union.union(incomingSketch);
     }
   }
 
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDF.java
index 904446f..1e81579 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.Description;
@@ -41,6 +41,7 @@ public class StringsSketchToStringUDF extends UDF {
   public String evaluate(final BytesWritable serializedSketch) {
     if (serializedSketch == null) { return null; }
     final ItemsSketch<String> sketch = ItemsSketch.getInstance(
+      String.class,
       BytesWritableHelper.wrapAsMemory(serializedSketch),
       Comparator.naturalOrder(),
       new ArrayOfStringsSerDe()
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/UnionItemsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/UnionItemsSketchUDAF.java
index cfd35fa..1ca92ae 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/UnionItemsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/UnionItemsSketchUDAF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
 import org.apache.hadoop.hive.ql.parse.SemanticException;
@@ -56,8 +56,8 @@ public abstract class UnionItemsSketchUDAF<T> extends 
AbstractGenericUDAFResolve
 
   public static class UnionEvaluator<T> extends ItemsEvaluator<T> {
 
-    UnionEvaluator(final Comparator<? super T> comparator, final 
ArrayOfItemsSerDe<T> serDe) {
-      super(comparator, serDe);
+    UnionEvaluator(final Class<T> clazz, final Comparator<? super T> 
comparator, final ArrayOfItemsSerDe<T> serDe) {
+      super(clazz, comparator, serDe);
     }
 
     @Override
diff --git 
a/src/main/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAF.java
 
b/src/main/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAF.java
index 641482e..2d7b0c1 100644
--- 
a/src/main/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAF.java
@@ -21,7 +21,7 @@ package org.apache.datasketches.hive.quantiles;
 
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
 
@@ -38,7 +38,7 @@ public class UnionStringsSketchUDAF extends 
UnionItemsSketchUDAF<String> {
   static class UnionStringsSketchEvaluator extends UnionEvaluator<String> {
 
     UnionStringsSketchEvaluator() {
-      super(Comparator.naturalOrder(), new ArrayOfStringsSerDe());
+      super(String.class, Comparator.naturalOrder(), new 
ArrayOfStringsSerDe());
     }
 
   }
diff --git 
a/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToEstimatesUDF.java
 
b/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToEstimatesUDF.java
index f137984..e3a238d 100644
--- 
a/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToEstimatesUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToEstimatesUDF.java
@@ -24,7 +24,7 @@ import java.util.List;
 
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.tuple.Sketch;
-import org.apache.datasketches.tuple.SketchIterator;
+import org.apache.datasketches.tuple.TupleSketchIterator;
 import org.apache.datasketches.tuple.Sketches;
 import org.apache.datasketches.tuple.SummaryDeserializer;
 import org.apache.datasketches.tuple.adouble.DoubleSummary;
@@ -58,7 +58,7 @@ public class DoubleSummarySketchToEstimatesUDF extends UDF {
     final Sketch<DoubleSummary> sketch =
         
Sketches.heapifySketch(BytesWritableHelper.wrapAsMemory(serializedSketch), 
SUMMARY_DESERIALIZER);
     double sum = 0;
-    final SketchIterator<DoubleSummary> it = sketch.iterator();
+    final TupleSketchIterator<DoubleSummary> it = sketch.iterator();
     while (it.next()) {
       sum += it.getSummary().getValue();
     }
diff --git 
a/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToPercentileUDF.java
 
b/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToPercentileUDF.java
index 1eda623..d0dd87c 100644
--- 
a/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToPercentileUDF.java
+++ 
b/src/main/java/org/apache/datasketches/hive/tuple/DoubleSummarySketchToPercentileUDF.java
@@ -23,7 +23,7 @@ import 
org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.DoublesSketch;
 import org.apache.datasketches.quantiles.UpdateDoublesSketch;
 import org.apache.datasketches.tuple.Sketch;
-import org.apache.datasketches.tuple.SketchIterator;
+import org.apache.datasketches.tuple.TupleSketchIterator;
 import org.apache.datasketches.tuple.Sketches;
 import org.apache.datasketches.tuple.SummaryDeserializer;
 import org.apache.datasketches.tuple.adouble.DoubleSummary;
@@ -62,7 +62,7 @@ public class DoubleSummarySketchToPercentileUDF extends UDF {
     final Sketch<DoubleSummary> sketch =
         
Sketches.heapifySketch(BytesWritableHelper.wrapAsMemory(serializedSketch), 
SUMMARY_DESERIALIZER);
     final UpdateDoublesSketch qs = 
DoublesSketch.builder().setK(QUANTILES_SKETCH_K).build();
-    final SketchIterator<DoubleSummary> it = sketch.iterator();
+    final TupleSketchIterator<DoubleSummary> it = sketch.iterator();
     while (it.next()) {
       qs.update(it.getSummary().getValue());
     }
diff --git 
a/src/test/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAFTest.java
 
b/src/test/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAFTest.java
index 99fbdd2..1ebd3a2 100644
--- 
a/src/test/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/frequencies/DataToStringsSketchUDAFTest.java
@@ -21,8 +21,8 @@ package org.apache.datasketches.hive.frequencies;
 
 import java.util.Arrays;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.frequencies.ItemsSketch;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git 
a/src/test/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTFTest.java
 
b/src/test/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTFTest.java
index 12d4a07..fa3699c 100644
--- 
a/src/test/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/frequencies/GetFrequentItemsFromStringsSketchUDTFTest.java
@@ -38,8 +38,8 @@ import org.apache.hadoop.io.BytesWritable;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.frequencies.ItemsSketch;
 
 @SuppressWarnings("javadoc")
diff --git 
a/src/test/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAFTest.java
 
b/src/test/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAFTest.java
index 47e39d7..696eda4 100644
--- 
a/src/test/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/frequencies/UnionStringsSketchUDAFTest.java
@@ -21,8 +21,8 @@ package org.apache.datasketches.hive.frequencies;
 
 import java.util.Arrays;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.frequencies.ItemsSketch;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAFTest.java
index 4276832..db75b23 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/DataToStringsSketchUDAFTest.java
@@ -22,8 +22,8 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Arrays;
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDFTest.java
index 68d5eb5..1ae86b1 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetCdfFromStringsSketchUDFTest.java
@@ -22,8 +22,8 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Comparator;
 import java.util.List;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.io.BytesWritable;
 import org.testng.Assert;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDFTest.java
index 0ffa53c..86c63e2 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetKFromStringsSketchUDFTest.java
@@ -23,8 +23,8 @@ import java.util.Comparator;
 
 import org.apache.hadoop.io.BytesWritable;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.quantiles.ItemsSketch;
 
 import org.testng.annotations.Test;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDFTest.java
index 6b44ac6..78f11c8 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetNFromStringsSketchUDFTest.java
@@ -23,8 +23,8 @@ import java.util.Comparator;
 
 import org.apache.hadoop.io.BytesWritable;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.quantiles.ItemsSketch;
 
 import org.testng.annotations.Test;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDFTest.java
index 7d2dd7b..a428eb4 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetPmfFromStringsSketchUDFTest.java
@@ -22,8 +22,8 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Comparator;
 import java.util.List;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.io.BytesWritable;
 import org.testng.Assert;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDFTest.java
index 380ff6b..edf90b2 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantileFromStringsSketchUDFTest.java
@@ -25,9 +25,9 @@ import org.apache.hadoop.io.BytesWritable;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfLongsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfLongsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.SketchesArgumentException;
 import org.apache.datasketches.quantiles.ItemsSketch;
 
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDFTest.java
index f0836b0..47c0f72 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/GetQuantilesFromStringsSketchUDFTest.java
@@ -26,9 +26,9 @@ import org.apache.hadoop.io.BytesWritable;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfLongsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfLongsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.SketchesArgumentException;
 import org.apache.datasketches.quantiles.ItemsSketch;
 
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDFTest.java
index cf4731b..4a15f30 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/StringsSketchToStringUDFTest.java
@@ -23,8 +23,8 @@ import java.util.Comparator;
 
 import org.apache.hadoop.io.BytesWritable;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.quantiles.ItemsSketch;
 
 import org.testng.annotations.Test;
diff --git 
a/src/test/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAFTest.java
 
b/src/test/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAFTest.java
index 6df21f1..e69cdcc 100644
--- 
a/src/test/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAFTest.java
+++ 
b/src/test/java/org/apache/datasketches/hive/quantiles/UnionStringsSketchUDAFTest.java
@@ -22,8 +22,8 @@ package org.apache.datasketches.hive.quantiles;
 import java.util.Arrays;
 import java.util.Comparator;
 
-import org.apache.datasketches.ArrayOfItemsSerDe;
-import org.apache.datasketches.ArrayOfStringsSerDe;
+import org.apache.datasketches.common.ArrayOfItemsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
 import org.apache.datasketches.hive.common.BytesWritableHelper;
 import org.apache.datasketches.quantiles.ItemsSketch;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;


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