diff --git a/cpp/include/cudf/detail/gather.cuh b/cpp/include/cudf/detail/gather.cuh
index b8edf5ab4cb..87f5c9251c7 100644
--- a/cpp/include/cudf/detail/gather.cuh
+++ b/cpp/include/cudf/detail/gather.cuh
@@ -557,14 +557,14 @@ struct column_gatherer_impl<struct_view, MapItRoot> {
                    std::back_inserter(output_struct_members),
                    [&gather_map_begin, &gather_map_end, nullify_out_of_bounds, stream, mr](
                      cudf::column_view const& col) {
-                     return cudf::type_dispatcher(col.type(),
-                                                  column_gatherer{},
-                                                  col,
-                                                  gather_map_begin,
-                                                  gather_map_end,
-                                                  nullify_out_of_bounds,
-                                                  stream,
-                                                  mr);
+                     return cudf::type_dispatcher<dispatch_storage_type>(col.type(),
+                                                                         column_gatherer{},
+                                                                         col,
+                                                                         gather_map_begin,
+                                                                         gather_map_end,
+                                                                         nullify_out_of_bounds,
+                                                                         stream,
+                                                                         mr);
                    });
 
     gather_bitmask(
diff --git a/cpp/src/lists/copying/gather.cu b/cpp/src/lists/copying/gather.cu
index 82bfab0d0c5..99feab3c977 100644
--- a/cpp/src/lists/copying/gather.cu
+++ b/cpp/src/lists/copying/gather.cu
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, NVIDIA CORPORATION.
+ * Copyright (c) 2020-2021, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -96,17 +96,17 @@ std::unique_ptr<column> gather_list_leaf(column_view const& column,
   size_type gather_map_size = gd.gather_map_size;
 
   // call the normal gather
-  auto leaf_column =
-    cudf::type_dispatcher(column.type(),
-                          cudf::detail::column_gatherer{},
-                          column,
-                          gather_map_begin,
-                          gather_map_begin + gather_map_size,
-                          // note : we don't need to bother checking for out-of-bounds here since
-                          // our inputs at this stage aren't coming from the user.
-                          false,
-                          stream,
-                          mr);
+  auto leaf_column = cudf::type_dispatcher<dispatch_storage_type>(
+    column.type(),
+    cudf::detail::column_gatherer{},
+    column,
+    gather_map_begin,
+    gather_map_begin + gather_map_size,
+    // note : we don't need to bother checking for out-of-bounds here since
+    // our inputs at this stage aren't coming from the user.
+    false,
+    stream,
+    mr);
 
   // the column_gatherer doesn't create the null mask because it expects
   // that will be done in the gather_bitmask() step.  however, gather_bitmask()
diff --git a/cpp/src/strings/findall.cu b/cpp/src/strings/findall.cu
index b9f2f7046a3..2c26875b5d6 100644
--- a/cpp/src/strings/findall.cu
+++ b/cpp/src/strings/findall.cu
@@ -16,9 +16,9 @@
 
 #include <cudf/column/column.hpp>
 #include <cudf/column/column_device_view.cuh>
-#include <cudf/column/column_factories.hpp>
 #include <cudf/detail/null_mask.hpp>
 #include <cudf/detail/nvtx/ranges.hpp>
+#include <cudf/strings/detail/strings_column_factories.cuh>
 #include <cudf/strings/detail/utilities.hpp>
 #include <cudf/strings/findall.hpp>
 #include <cudf/strings/string_view.cuh>
@@ -118,42 +118,43 @@ std::unique_ptr<table> findall_re(
   rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource(),
   rmm::cuda_stream_view stream        = rmm::cuda_stream_default)
 {
-  auto strings_count  = strings.size();
-  auto strings_column = column_device_view::create(strings.parent(), stream);
-  auto d_strings      = *strings_column;
+  auto const strings_count = strings.size();
+  auto const d_strings     = column_device_view::create(strings.parent(), stream);
 
-  auto d_flags = detail::get_character_flags_table();
+  auto const d_flags = detail::get_character_flags_table();
   // compile regex into device object
-  auto prog       = reprog_device::create(pattern, d_flags, strings_count, stream);
-  auto d_prog     = *prog;
-  int regex_insts = prog->insts_counts();
+  auto const d_prog      = reprog_device::create(pattern, d_flags, strings_count, stream);
+  auto const regex_insts = d_prog->insts_counts();
 
-  rmm::device_vector<size_type> find_counts(strings_count);
-  auto d_find_counts = find_counts.data().get();
+  rmm::device_uvector<size_type> find_counts(strings_count, stream);
+  auto d_find_counts = find_counts.data();
 
   if ((regex_insts > MAX_STACK_INSTS) || (regex_insts <= RX_SMALL_INSTS))
     thrust::transform(rmm::exec_policy(stream),
                       thrust::make_counting_iterator<size_type>(0),
                       thrust::make_counting_iterator<size_type>(strings_count),
                       d_find_counts,
-                      findall_count_fn<RX_STACK_SMALL>{d_strings, d_prog});
+                      findall_count_fn<RX_STACK_SMALL>{*d_strings, *d_prog});
   else if (regex_insts <= RX_MEDIUM_INSTS)
     thrust::transform(rmm::exec_policy(stream),
                       thrust::make_counting_iterator<size_type>(0),
                       thrust::make_counting_iterator<size_type>(strings_count),
                       d_find_counts,
-                      findall_count_fn<RX_STACK_MEDIUM>{d_strings, d_prog});
+                      findall_count_fn<RX_STACK_MEDIUM>{*d_strings, *d_prog});
   else
     thrust::transform(rmm::exec_policy(stream),
                       thrust::make_counting_iterator<size_type>(0),
                       thrust::make_counting_iterator<size_type>(strings_count),
                       d_find_counts,
-                      findall_count_fn<RX_STACK_LARGE>{d_strings, d_prog});
+                      findall_count_fn<RX_STACK_LARGE>{*d_strings, *d_prog});
 
   std::vector<std::unique_ptr<column>> results;
 
-  size_type columns =
-    *thrust::max_element(rmm::exec_policy(stream), find_counts.begin(), find_counts.end());
+  size_type const columns = thrust::reduce(rmm::exec_policy(stream),
+                                           find_counts.begin(),
+                                           find_counts.end(),
+                                           0,
+                                           thrust::maximum<size_type>{});
   // boundary case: if no columns, return all nulls column (issue #119)
   if (columns == 0)
     results.emplace_back(std::make_unique<column>(
@@ -164,30 +165,32 @@ std::unique_ptr<table> findall_re(
       strings_count));
 
   for (int32_t column_index = 0; column_index < columns; ++column_index) {
-    rmm::device_vector<string_index_pair> indices(strings_count);
-    string_index_pair* d_indices = indices.data().get();
+    rmm::device_uvector<string_index_pair> indices(strings_count, stream);
+    auto d_indices = indices.data();
 
     if ((regex_insts > MAX_STACK_INSTS) || (regex_insts <= RX_SMALL_INSTS))
-      thrust::transform(rmm::exec_policy(stream),
-                        thrust::make_counting_iterator<size_type>(0),
-                        thrust::make_counting_iterator<size_type>(strings_count),
-                        d_indices,
-                        findall_fn<RX_STACK_SMALL>{d_strings, d_prog, column_index, d_find_counts});
+      thrust::transform(
+        rmm::exec_policy(stream),
+        thrust::make_counting_iterator<size_type>(0),
+        thrust::make_counting_iterator<size_type>(strings_count),
+        d_indices,
+        findall_fn<RX_STACK_SMALL>{*d_strings, *d_prog, column_index, d_find_counts});
     else if (regex_insts <= RX_MEDIUM_INSTS)
       thrust::transform(
         rmm::exec_policy(stream),
         thrust::make_counting_iterator<size_type>(0),
         thrust::make_counting_iterator<size_type>(strings_count),
         d_indices,
-        findall_fn<RX_STACK_MEDIUM>{d_strings, d_prog, column_index, d_find_counts});
+        findall_fn<RX_STACK_MEDIUM>{*d_strings, *d_prog, column_index, d_find_counts});
     else
-      thrust::transform(rmm::exec_policy(stream),
-                        thrust::make_counting_iterator<size_type>(0),
-                        thrust::make_counting_iterator<size_type>(strings_count),
-                        d_indices,
-                        findall_fn<RX_STACK_LARGE>{d_strings, d_prog, column_index, d_find_counts});
+      thrust::transform(
+        rmm::exec_policy(stream),
+        thrust::make_counting_iterator<size_type>(0),
+        thrust::make_counting_iterator<size_type>(strings_count),
+        d_indices,
+        findall_fn<RX_STACK_LARGE>{*d_strings, *d_prog, column_index, d_find_counts});
     //
-    results.emplace_back(make_strings_column(indices, stream, mr));
+    results.emplace_back(make_strings_column(indices.begin(), indices.end(), stream, mr));
   }
   return std::make_unique<table>(std::move(results));
 }
diff --git a/cpp/tests/collect_list/collect_list_test.cpp b/cpp/tests/collect_list/collect_list_test.cpp
index 98a7b2bacc2..2e48ff02183 100644
--- a/cpp/tests/collect_list/collect_list_test.cpp
+++ b/cpp/tests/collect_list/collect_list_test.cpp
@@ -41,8 +41,10 @@ template <typename T>
 struct TypedCollectListTest : public CollectListTest {
 };
 
-using TypesForTest = cudf::test::
-  Concat<cudf::test::IntegralTypes, cudf::test::FloatingPointTypes, cudf::test::DurationTypes>;
+using TypesForTest = cudf::test::Concat<cudf::test::IntegralTypes,
+                                        cudf::test::FloatingPointTypes,
+                                        cudf::test::DurationTypes,
+                                        cudf::test::FixedPointTypes>;
 
 TYPED_TEST_CASE(TypedCollectListTest, TypesForTest);
 
diff --git a/cpp/tests/copying/gather_list_tests.cu b/cpp/tests/copying/gather_list_tests.cu
index 59f696c440e..ac6524b94ee 100644
--- a/cpp/tests/copying/gather_list_tests.cu
+++ b/cpp/tests/copying/gather_list_tests.cu
@@ -35,6 +35,7 @@ template <typename T>
 class GatherTestListTyped : public cudf::test::BaseFixture {
 };
 using FixedWidthTypesNotBool = cudf::test::Concat<cudf::test::IntegralTypesNotBool,
+                                                  cudf::test::FixedPointTypes,
                                                   cudf::test::FloatingPointTypes,
                                                   cudf::test::DurationTypes,
                                                   cudf::test::TimestampTypes>;