From 3e92cdf1cfcde8447e3a61dfe36eb813716ad202 Mon Sep 17 00:00:00 2001
From: Samarth Jain <samarth@apache.org>
Date: Wed, 1 Jul 2020 14:33:17 -0700
Subject: [PATCH] Revert "Fix
 UnknownTypeComplexColumn#makeVectorObjectSelector" (#10121)

This reverts commit 7bb7489afc7a2cc496be93ae69681b6ab13a7c66.
---
 .../column/UnknownTypeComplexColumn.java      | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/processing/src/main/java/org/apache/druid/segment/column/UnknownTypeComplexColumn.java b/processing/src/main/java/org/apache/druid/segment/column/UnknownTypeComplexColumn.java
index ce4db70438e..7332a5c3822 100644
--- a/processing/src/main/java/org/apache/druid/segment/column/UnknownTypeComplexColumn.java
+++ b/processing/src/main/java/org/apache/druid/segment/column/UnknownTypeComplexColumn.java
@@ -25,6 +25,7 @@ import org.apache.druid.segment.data.ReadableOffset;
 import org.apache.druid.segment.vector.NilVectorSelector;
 import org.apache.druid.segment.vector.ReadableVectorOffset;
 import org.apache.druid.segment.vector.VectorObjectSelector;
+import org.apache.druid.segment.vector.VectorSizeInspector;
 
 import javax.annotation.Nullable;
 
@@ -37,6 +38,22 @@ public class UnknownTypeComplexColumn implements ComplexColumn
     return INSTANCE;
   }
 
+  private static final NilVectorSelector NIL_VECTOR_SELECTOR_INSTANCE =
+      NilVectorSelector.create(new VectorSizeInspector()
+      {
+        @Override
+        public int getMaxVectorSize()
+        {
+          return 0;
+        }
+
+        @Override
+        public int getCurrentVectorSize()
+        {
+          return 0;
+        }
+      });
+
   @Override
   public Class<?> getClazz()
   {
@@ -77,6 +94,6 @@ public class UnknownTypeComplexColumn implements ComplexColumn
   @Override
   public VectorObjectSelector makeVectorObjectSelector(ReadableVectorOffset offset)
   {
-    return NilVectorSelector.create(offset);
+    return NIL_VECTOR_SELECTOR_INSTANCE;
   }
 }