Update gh issue number in tests

cpp/src/arrow/acero/hash_join_node_test.cc

@@ -3277,8 +3277,8 @@ void AssertRowCountEq(Declaration source, int64_t expected) {
 
 }  // namespace
 
-// Test that both the key and the payload of the right side (the build side) are fixed
-// length and larger than 4GB, and the 64-bit offset in the hash table can handle it
+// GH-43495: Test that both the key and the payload of the right side (the build side) are
+// fixed length and larger than 4GB, and the 64-bit offset in the hash table can handle it
 // correctly.
 TEST(HashJoin, LARGE_MEMORY_TEST(BuildSideOver4GBFixedLength)) {
   constexpr int64_t k5GB = 5ll * 1024 * 1024 * 1024;
@@ -3362,8 +3362,8 @@ TEST(HashJoin, LARGE_MEMORY_TEST(BuildSideOver4GBFixedLength)) {
                    num_batches_left * num_rows_per_batch_left * num_batches_right);
 }
 
-// Test that both the key and the payload of the right side (the build side) are var
-// length and larger than 4GB, and the 64-bit offset in the hash table can handle it
+// GH-43495: Test that both the key and the payload of the right side (the build side) are
+// var length and larger than 4GB, and the 64-bit offset in the hash table can handle it
 // correctly.
 TEST(HashJoin, LARGE_MEMORY_TEST(BuildSideOver4GBVarLength)) {
   constexpr int64_t k5GB = 5ll * 1024 * 1024 * 1024;

cpp/src/arrow/compute/row/compare_test.cc

@@ -338,7 +338,7 @@ TEST(KeyCompare, LARGE_MEMORY_TEST(CompareColumnsToRowsOver2GB)) {
   AssertCompareColumnsToRowsAllMatch(columns_left, row_table_right, row_ids_to_compare);
 }
 
-// GH-XXXXX: Compare fixed length columns to rows over 4GB within a row table.
+// GH-43495: Compare fixed length columns to rows over 4GB within a row table.
 TEST(KeyCompare, LARGE_MEMORY_TEST(CompareColumnsToRowsOver4GBFixedLength)) {
   if constexpr (sizeof(void*) == 4) {
     GTEST_SKIP() << "Test only works on 64-bit platforms";
@@ -400,7 +400,7 @@ TEST(KeyCompare, LARGE_MEMORY_TEST(CompareColumnsToRowsOver4GBFixedLength)) {
   AssertCompareColumnsToRowsAllMatch(columns_left, row_table_right, row_ids_to_compare);
 }
 
-// GH-XXXXX: Compare var length columns to rows at offset over 4GB within a row table.
+// GH-43495: Compare var length columns to rows at offset over 4GB within a row table.
 TEST(KeyCompare, LARGE_MEMORY_TEST(CompareColumnsToRowsOver4GBVarLength)) {
   if constexpr (sizeof(void*) == 4) {
     GTEST_SKIP() << "Test only works on 64-bit platforms";

cpp/src/arrow/compute/row/row_test.cc

@@ -134,7 +134,7 @@ TEST(RowTableMemoryConsumption, Encode) {
   }
 }
 
-// GH-XXXXX: Ensure that we can build a row table with more than 4GB row data.
+// GH-43495: Ensure that we can build a row table with more than 4GB row data.
 TEST(RowTableLarge, LARGE_MEMORY_TEST(Encode)) {
   if constexpr (sizeof(void*) == 4) {
     GTEST_SKIP() << "Test only works on 64-bit platforms";
@@ -183,7 +183,7 @@ TEST(RowTableLarge, LARGE_MEMORY_TEST(Encode)) {
             row_table.offsets()[num_rows - 1] + length_per_binary);
 }
 
-// GH-XXXXX: Ensure that we can build a row table with more than 4GB row data.
+// GH-43495: Ensure that we can build a row table with more than 4GB row data.
 TEST(RowTableLarge, LARGE_MEMORY_TEST(AppendFrom)) {
   if constexpr (sizeof(void*) == 4) {
     GTEST_SKIP() << "Test only works on 64-bit platforms";