diff --git a/processing/src/main/java/org/apache/druid/math/expr/Function.java b/processing/src/main/java/org/apache/druid/math/expr/Function.java
index cabeb557792c..3af7aa181da1 100644
--- a/processing/src/main/java/org/apache/druid/math/expr/Function.java
+++ b/processing/src/main/java/org/apache/druid/math/expr/Function.java
@@ -28,7 +28,6 @@
 import org.apache.druid.java.util.common.UOE;
 import org.apache.druid.math.expr.vector.CastToTypeVectorProcessor;
 import org.apache.druid.math.expr.vector.ExprVectorProcessor;
-import org.apache.druid.math.expr.vector.VectorComparisonProcessors;
 import org.apache.druid.math.expr.vector.VectorMathProcessors;
 import org.apache.druid.math.expr.vector.VectorProcessors;
 import org.apache.druid.math.expr.vector.VectorStringProcessors;
@@ -2422,19 +2421,6 @@ public ExpressionType getOutputType(Expr.InputBindingInspector inspector, List<E
     {
       return ExpressionType.LONG;
     }
-
-    @Override
-    public boolean canVectorize(Expr.InputBindingInspector inspector, List<Expr> args)
-    {
-      final Expr expr = args.get(0);
-      return inspector.areNumeric(expr) && expr.canVectorize(inspector);
-    }
-
-    @Override
-    public <T> ExprVectorProcessor<T> asVectorProcessor(Expr.VectorInputBindingInspector inspector, List<Expr> args)
-    {
-      return VectorComparisonProcessors.lessThanOrEqual(inspector, args.get(0), ExprEval.of(0L).toExpr());
-    }
   }
 
   /**
@@ -2467,19 +2453,6 @@ public ExpressionType getOutputType(Expr.InputBindingInspector inspector, List<E
     {
       return ExpressionType.LONG;
     }
-
-    @Override
-    public boolean canVectorize(Expr.InputBindingInspector inspector, List<Expr> args)
-    {
-      final Expr expr = args.get(0);
-      return inspector.areNumeric(expr) && expr.canVectorize(inspector);
-    }
-
-    @Override
-    public <T> ExprVectorProcessor<T> asVectorProcessor(Expr.VectorInputBindingInspector inspector, List<Expr> args)
-    {
-      return VectorComparisonProcessors.greaterThan(inspector, args.get(0), ExprEval.of(0L).toExpr());
-    }
   }
 
   class IsNullFunc implements Function
diff --git a/sql/src/test/java/org/apache/druid/sql/calcite/CalciteQueryTest.java b/sql/src/test/java/org/apache/druid/sql/calcite/CalciteQueryTest.java
index 99b974aa7110..74800270bc4b 100644
--- a/sql/src/test/java/org/apache/druid/sql/calcite/CalciteQueryTest.java
+++ b/sql/src/test/java/org/apache/druid/sql/calcite/CalciteQueryTest.java
@@ -2470,6 +2470,12 @@ public void testExactCountDistinctWithFilter()
     );
 
     requireMergeBuffers(3);
+
+    if (NullHandling.sqlCompatible()) {
+      // Cannot vectorize due to "istrue" operator.
+      cannotVectorize();
+    }
+
     testQuery(
         PLANNER_CONFIG_NO_HLL.withOverrides(
             ImmutableMap.of(
@@ -2489,9 +2495,9 @@ public void testExactCountDistinctWithFilter()
                                             .setGranularity(Granularities.ALL)
                                             .setVirtualColumns(expressionVirtualColumn(
                                                 "v0",
-                                                NullHandling.replaceWithDefault()
-                                                ? "(\"cnt\" == 1)"
-                                                : "istrue((\"cnt\" == 1))",
+                                                NullHandling.sqlCompatible()
+                                                ? "istrue((\"cnt\" == 1))"
+                                                : "(\"cnt\" == 1)",
                                                 ColumnType.LONG
                                             ))
                                             .setDimensions(dimensions(