From 4275311a5975f183679c64ce7efd460a402cb2f8 Mon Sep 17 00:00:00 2001
From: Nicholas Gates <nick@nickgates.com>
Date: Fri, 20 Mar 2026 16:19:50 -0400
Subject: [PATCH 1/2] Only pass vtable once via ExtDType<V>

Signed-off-by: Nicholas Gates <nick@nickgates.com>
---
 vortex-array/public-api.lock                  | 108 +++++++++---------
 .../src/arrays/extension/compute/rules.rs     |   6 +-
 vortex-array/src/dtype/extension/typed.rs     |  12 +-
 vortex-array/src/dtype/extension/vtable.rs    |  12 +-
 vortex-array/src/extension/datetime/date.rs   |  15 ++-
 vortex-array/src/extension/datetime/time.rs   |  15 ++-
 .../src/extension/datetime/timestamp.rs       |   7 +-
 .../src/extension/tests/divisible_int.rs      |   6 +-
 vortex-array/src/extension/uuid/vtable.rs     |  11 +-
 vortex-array/src/scalar/arrow.rs              |   2 -
 vortex-array/src/scalar/tests/casting.rs      |   9 +-
 .../src/scalar/typed_view/extension/tests.rs  |   9 +-
 vortex-duckdb/src/convert/dtype.rs            |   3 +-
 vortex-tensor/public-api.lock                 |   8 +-
 vortex-tensor/src/fixed_shape/vtable.rs       |   3 +-
 vortex-tensor/src/vector/vtable.rs            |   3 +-
 16 files changed, 103 insertions(+), 126 deletions(-)

diff --git a/vortex-array/public-api.lock b/vortex-array/public-api.lock
index c53d9a893cf..15cc3e5936e 100644
--- a/vortex-array/public-api.lock
+++ b/vortex-array/public-api.lock
@@ -10176,23 +10176,23 @@ pub type vortex_array::dtype::extension::ExtVTable::Metadata: 'static + core::ma
 
 pub type vortex_array::dtype::extension::ExtVTable::NativeValue<'a>: core::fmt::Display
 
-pub fn vortex_array::dtype::extension::ExtVTable::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::dtype::extension::ExtVTable::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::dtype::extension::ExtVTable::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::dtype::extension::ExtVTable::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::dtype::extension::ExtVTable::deserialize_metadata(&self, metadata: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::dtype::extension::ExtVTable::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::dtype::extension::ExtVTable::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::dtype::extension::ExtVTable::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::dtype::extension::ExtVTable::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::dtype::extension::ExtVTable::unpack_native<'a>(&self, ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::dtype::extension::ExtVTable::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::dtype::extension::ExtVTable::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::dtype::extension::ExtVTable::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::dtype::extension::ExtVTable::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::dtype::extension::ExtVTable::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 impl vortex_array::dtype::extension::ExtVTable for vortex_array::extension::datetime::Date
 
@@ -10200,23 +10200,23 @@ pub type vortex_array::extension::datetime::Date::Metadata = vortex_array::exten
 
 pub type vortex_array::extension::datetime::Date::NativeValue<'a> = vortex_array::extension::datetime::DateValue
 
-pub fn vortex_array::extension::datetime::Date::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Date::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Date::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Date::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Date::deserialize_metadata(&self, metadata: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Date::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Date::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Date::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Date::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Date::unpack_native(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Date::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Date::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Date::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Date::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Date::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 impl vortex_array::dtype::extension::ExtVTable for vortex_array::extension::datetime::Time
 
@@ -10224,23 +10224,23 @@ pub type vortex_array::extension::datetime::Time::Metadata = vortex_array::exten
 
 pub type vortex_array::extension::datetime::Time::NativeValue<'a> = vortex_array::extension::datetime::TimeValue
 
-pub fn vortex_array::extension::datetime::Time::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Time::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Time::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Time::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Time::deserialize_metadata(&self, data: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Time::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Time::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Time::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Time::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Time::unpack_native(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Time::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Time::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Time::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Time::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Time::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 impl vortex_array::dtype::extension::ExtVTable for vortex_array::extension::datetime::Timestamp
 
@@ -10248,23 +10248,23 @@ pub type vortex_array::extension::datetime::Timestamp::Metadata = vortex_array::
 
 pub type vortex_array::extension::datetime::Timestamp::NativeValue<'a> = vortex_array::extension::datetime::TimestampValue<'a>
 
-pub fn vortex_array::extension::datetime::Timestamp::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Timestamp::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Timestamp::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Timestamp::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Timestamp::deserialize_metadata(&self, data: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Timestamp::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Timestamp::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Timestamp::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Timestamp::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Timestamp::unpack_native<'a>(&self, ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Timestamp::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Timestamp::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Timestamp::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Timestamp::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Timestamp::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 impl vortex_array::dtype::extension::ExtVTable for vortex_array::extension::uuid::Uuid
 
@@ -10272,23 +10272,23 @@ pub type vortex_array::extension::uuid::Uuid::Metadata = vortex_array::extension
 
 pub type vortex_array::extension::uuid::Uuid::NativeValue<'a> = uuid::Uuid
 
-pub fn vortex_array::extension::uuid::Uuid::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::uuid::Uuid::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::uuid::Uuid::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::uuid::Uuid::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::uuid::Uuid::deserialize_metadata(&self, metadata: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::uuid::Uuid::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::uuid::Uuid::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::uuid::Uuid::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::uuid::Uuid::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::uuid::Uuid::unpack_native<'a>(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::uuid::Uuid::unpack_native<'a>(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::uuid::Uuid::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::uuid::Uuid::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::uuid::Uuid::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::uuid::Uuid::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 pub trait vortex_array::dtype::extension::Matcher
 
@@ -14142,23 +14142,23 @@ pub type vortex_array::extension::datetime::Date::Metadata = vortex_array::exten
 
 pub type vortex_array::extension::datetime::Date::NativeValue<'a> = vortex_array::extension::datetime::DateValue
 
-pub fn vortex_array::extension::datetime::Date::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Date::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Date::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Date::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Date::deserialize_metadata(&self, metadata: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Date::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Date::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Date::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Date::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Date::unpack_native(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Date::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Date::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Date::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Date::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Date::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 pub struct vortex_array::extension::datetime::Time
 
@@ -14198,23 +14198,23 @@ pub type vortex_array::extension::datetime::Time::Metadata = vortex_array::exten
 
 pub type vortex_array::extension::datetime::Time::NativeValue<'a> = vortex_array::extension::datetime::TimeValue
 
-pub fn vortex_array::extension::datetime::Time::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Time::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Time::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Time::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Time::deserialize_metadata(&self, data: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Time::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Time::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Time::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Time::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Time::unpack_native(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Time::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Time::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Time::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Time::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Time::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 pub struct vortex_array::extension::datetime::Timestamp
 
@@ -14256,23 +14256,23 @@ pub type vortex_array::extension::datetime::Timestamp::Metadata = vortex_array::
 
 pub type vortex_array::extension::datetime::Timestamp::NativeValue<'a> = vortex_array::extension::datetime::TimestampValue<'a>
 
-pub fn vortex_array::extension::datetime::Timestamp::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Timestamp::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::datetime::Timestamp::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::datetime::Timestamp::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::datetime::Timestamp::deserialize_metadata(&self, data: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::datetime::Timestamp::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::datetime::Timestamp::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::datetime::Timestamp::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::datetime::Timestamp::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::datetime::Timestamp::unpack_native<'a>(&self, ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::datetime::Timestamp::unpack_native<'a>(ext_dtype: &'a vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::datetime::Timestamp::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Timestamp::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::datetime::Timestamp::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::datetime::Timestamp::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 pub struct vortex_array::extension::datetime::TimestampOptions
 
@@ -14338,23 +14338,23 @@ pub type vortex_array::extension::uuid::Uuid::Metadata = vortex_array::extension
 
 pub type vortex_array::extension::uuid::Uuid::NativeValue<'a> = uuid::Uuid
 
-pub fn vortex_array::extension::uuid::Uuid::can_coerce_from(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::uuid::Uuid::can_coerce_from(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
-pub fn vortex_array::extension::uuid::Uuid::can_coerce_to(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
+pub fn vortex_array::extension::uuid::Uuid::can_coerce_to(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> bool
 
 pub fn vortex_array::extension::uuid::Uuid::deserialize_metadata(&self, metadata: &[u8]) -> vortex_error::VortexResult<Self::Metadata>
 
 pub fn vortex_array::extension::uuid::Uuid::id(&self) -> vortex_array::dtype::extension::ExtId
 
-pub fn vortex_array::extension::uuid::Uuid::least_supertype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
+pub fn vortex_array::extension::uuid::Uuid::least_supertype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, other: &vortex_array::dtype::DType) -> core::option::Option<vortex_array::dtype::DType>
 
 pub fn vortex_array::extension::uuid::Uuid::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_array::extension::uuid::Uuid::unpack_native<'a>(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_array::extension::uuid::Uuid::unpack_native<'a>(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &'a vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_array::extension::uuid::Uuid::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::uuid::Uuid::validate_dtype(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
-pub fn vortex_array::extension::uuid::Uuid::validate_scalar_value(&self, ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
+pub fn vortex_array::extension::uuid::Uuid::validate_scalar_value(ext_dtype: &vortex_array::dtype::extension::ExtDType<Self>, storage_value: &vortex_array::scalar::ScalarValue) -> vortex_error::VortexResult<()>
 
 pub struct vortex_array::extension::uuid::UuidMetadata
 
diff --git a/vortex-array/src/arrays/extension/compute/rules.rs b/vortex-array/src/arrays/extension/compute/rules.rs
index e077dda5283..0703af6414a 100644
--- a/vortex-array/src/arrays/extension/compute/rules.rs
+++ b/vortex-array/src/arrays/extension/compute/rules.rs
@@ -95,12 +95,11 @@ mod tests {
             Ok(EmptyMetadata)
         }
 
-        fn validate_dtype(&self, _extension_dtype: &ExtDType<Self>) -> VortexResult<()> {
+        fn validate_dtype(_extension_dtype: &ExtDType<Self>) -> VortexResult<()> {
             Ok(())
         }
 
         fn unpack_native<'a>(
-            &self,
             _extension_dtype: &'a ExtDType<Self>,
             _storage_value: &'a ScalarValue,
         ) -> VortexResult<Self::NativeValue<'a>> {
@@ -192,12 +191,11 @@ mod tests {
                 Ok(EmptyMetadata)
             }
 
-            fn validate_dtype(&self, _extension_dtype: &ExtDType<Self>) -> VortexResult<()> {
+            fn validate_dtype(_extension_dtype: &ExtDType<Self>) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                &self,
                 _extension_dtype: &'a ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-array/src/dtype/extension/typed.rs b/vortex-array/src/dtype/extension/typed.rs
index baa3706b56b..045a1d99839 100644
--- a/vortex-array/src/dtype/extension/typed.rs
+++ b/vortex-array/src/dtype/extension/typed.rs
@@ -62,7 +62,7 @@ impl<V: ExtVTable> ExtDType<V> {
             storage_dtype,
         };
 
-        this.vtable.validate_dtype(&this)?;
+        V::validate_dtype(&this)?;
 
         Ok(this)
     }
@@ -182,7 +182,7 @@ impl<V: ExtVTable> DynExtDType for ExtDType<V> {
     }
 
     fn value_validate(&self, storage_value: &ScalarValue) -> VortexResult<()> {
-        self.vtable.validate_scalar_value(self, storage_value)
+        V::validate_scalar_value(self, storage_value)
     }
 
     fn value_display(
@@ -190,7 +190,7 @@ impl<V: ExtVTable> DynExtDType for ExtDType<V> {
         f: &mut fmt::Formatter<'_>,
         storage_value: &ScalarValue,
     ) -> fmt::Result {
-        match self.vtable.unpack_native(self, storage_value) {
+        match V::unpack_native(self, storage_value) {
             Ok(native) => fmt::Display::fmt(&native, f),
             Err(_) => write!(
                 f,
@@ -202,14 +202,14 @@ impl<V: ExtVTable> DynExtDType for ExtDType<V> {
     }
 
     fn coercion_can_coerce_from(&self, other: &DType) -> bool {
-        self.vtable.can_coerce_from(self, other)
+        V::can_coerce_from(self, other)
     }
 
     fn coercion_can_coerce_to(&self, other: &DType) -> bool {
-        self.vtable.can_coerce_to(self, other)
+        V::can_coerce_to(self, other)
     }
 
     fn coercion_least_supertype(&self, other: &DType) -> Option<DType> {
-        self.vtable.least_supertype(self, other)
+        V::least_supertype(self, other)
     }
 }
diff --git a/vortex-array/src/dtype/extension/vtable.rs b/vortex-array/src/dtype/extension/vtable.rs
index 120cfa02dc3..1b763f53635 100644
--- a/vortex-array/src/dtype/extension/vtable.rs
+++ b/vortex-array/src/dtype/extension/vtable.rs
@@ -37,14 +37,14 @@ pub trait ExtVTable: 'static + Sized + Send + Sync + Clone + Debug + Eq + Hash {
     fn deserialize_metadata(&self, metadata: &[u8]) -> VortexResult<Self::Metadata>;
 
     /// Validate that the given storage type is compatible with this extension type.
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()>;
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()>;
 
     /// Can a value of `other` be implicitly widened into this type?
     /// e.g. GeographyType might accept Point, LineString, etc.
     ///
     /// Implementors only need to override one of `can_coerce_from` or `can_coerce_to` — both
     /// exist so that either side of the coercion can provide the logic.
-    fn can_coerce_from(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
+    fn can_coerce_from(ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
         let _ = (ext_dtype, other);
         false
     }
@@ -53,14 +53,14 @@ pub trait ExtVTable: 'static + Sized + Send + Sync + Clone + Debug + Eq + Hash {
     ///
     /// Implementors only need to override one of `can_coerce_from` or `can_coerce_to` — both
     /// exist so that either side of the coercion can provide the logic.
-    fn can_coerce_to(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
+    fn can_coerce_to(ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
         let _ = (ext_dtype, other);
         false
     }
 
     /// Given two types in a Uniform context, what is their least supertype?
     /// Return None if no supertype exists.
-    fn least_supertype(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
+    fn least_supertype(ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
         let _ = (ext_dtype, other);
         None
     }
@@ -75,11 +75,10 @@ pub trait ExtVTable: 'static + Sized + Send + Sync + Clone + Debug + Eq + Hash {
     ///
     /// Returns an error if the storage [`ScalarValue`] is not compatible with the extension type.
     fn validate_scalar_value(
-        &self,
         ext_dtype: &ExtDType<Self>,
         storage_value: &ScalarValue,
     ) -> VortexResult<()> {
-        self.unpack_native(ext_dtype, storage_value).map(|_| ())
+        Self::unpack_native(ext_dtype, storage_value).map(|_| ())
     }
 
     /// Validate and unpack a native value from the storage [`ScalarValue`].
@@ -92,7 +91,6 @@ pub trait ExtVTable: 'static + Sized + Send + Sync + Clone + Debug + Eq + Hash {
     ///
     /// Returns an error if the storage [`ScalarValue`] is not compatible with the extension type.
     fn unpack_native<'a>(
-        &self,
         ext_dtype: &'a ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>>;
diff --git a/vortex-array/src/extension/datetime/date.rs b/vortex-array/src/extension/datetime/date.rs
index 57fe7ad87e0..a0434b3ebc5 100644
--- a/vortex-array/src/extension/datetime/date.rs
+++ b/vortex-array/src/extension/datetime/date.rs
@@ -91,7 +91,7 @@ impl ExtVTable for Date {
         TimeUnit::try_from(tag)
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         let metadata = ext_dtype.metadata();
         let ptype = date_ptype(metadata)
             .ok_or_else(|| vortex_err!("Date type does not support time unit {}", metadata))?;
@@ -106,7 +106,7 @@ impl ExtVTable for Date {
         Ok(())
     }
 
-    fn can_coerce_from(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
+    fn can_coerce_from(ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
         let DType::Extension(other_ext) = other else {
             return false;
         };
@@ -118,7 +118,7 @@ impl ExtVTable for Date {
         our_unit <= other_unit && (ext_dtype.storage_dtype().is_nullable() || !other.is_nullable())
     }
 
-    fn least_supertype(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
+    fn least_supertype(ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
         let DType::Extension(other_ext) = other else {
             return None;
         };
@@ -129,11 +129,10 @@ impl ExtVTable for Date {
         Some(DType::Extension(Date::new(finest, union_null).erased()))
     }
 
-    fn unpack_native(
-        &self,
-        ext_dtype: &ExtDType<Self>,
-        storage_value: &ScalarValue,
-    ) -> VortexResult<Self::NativeValue<'_>> {
+    fn unpack_native<'a>(
+        ext_dtype: &'a ExtDType<Self>,
+        storage_value: &'a ScalarValue,
+    ) -> VortexResult<Self::NativeValue<'a>> {
         let metadata = ext_dtype.metadata();
         match metadata {
             TimeUnit::Milliseconds => Ok(DateValue::Milliseconds(
diff --git a/vortex-array/src/extension/datetime/time.rs b/vortex-array/src/extension/datetime/time.rs
index eb53a0e0fe3..08c43e9e20c 100644
--- a/vortex-array/src/extension/datetime/time.rs
+++ b/vortex-array/src/extension/datetime/time.rs
@@ -92,7 +92,7 @@ impl ExtVTable for Time {
         TimeUnit::try_from(tag)
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         let metadata = ext_dtype.metadata();
         let ptype = time_ptype(metadata)
             .ok_or_else(|| vortex_err!("Time type does not support time unit {}", metadata))?;
@@ -107,7 +107,7 @@ impl ExtVTable for Time {
         Ok(())
     }
 
-    fn can_coerce_from(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
+    fn can_coerce_from(ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
         let DType::Extension(other_ext) = other else {
             return false;
         };
@@ -118,7 +118,7 @@ impl ExtVTable for Time {
         our_unit <= other_unit && (ext_dtype.storage_dtype().is_nullable() || !other.is_nullable())
     }
 
-    fn least_supertype(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
+    fn least_supertype(ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
         let DType::Extension(other_ext) = other else {
             return None;
         };
@@ -129,11 +129,10 @@ impl ExtVTable for Time {
         Some(DType::Extension(Time::new(finest, union_null).erased()))
     }
 
-    fn unpack_native(
-        &self,
-        ext_dtype: &ExtDType<Self>,
-        storage_value: &ScalarValue,
-    ) -> VortexResult<Self::NativeValue<'_>> {
+    fn unpack_native<'a>(
+        ext_dtype: &'a ExtDType<Self>,
+        storage_value: &'a ScalarValue,
+    ) -> VortexResult<Self::NativeValue<'a>> {
         let length_of_time = storage_value.as_primitive().cast::<i64>()?;
 
         let (span, value) = match *ext_dtype.metadata() {
diff --git a/vortex-array/src/extension/datetime/timestamp.rs b/vortex-array/src/extension/datetime/timestamp.rs
index ad78c76e3a9..b33571ed40e 100644
--- a/vortex-array/src/extension/datetime/timestamp.rs
+++ b/vortex-array/src/extension/datetime/timestamp.rs
@@ -169,7 +169,7 @@ impl ExtVTable for Timestamp {
         })
     }
 
-    fn can_coerce_from(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
+    fn can_coerce_from(ext_dtype: &ExtDType<Self>, other: &DType) -> bool {
         let DType::Extension(other_ext) = other else {
             return false;
         };
@@ -182,7 +182,7 @@ impl ExtVTable for Timestamp {
             && (ext_dtype.storage_dtype().is_nullable() || !other.is_nullable())
     }
 
-    fn least_supertype(&self, ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
+    fn least_supertype(ext_dtype: &ExtDType<Self>, other: &DType) -> Option<DType> {
         let DType::Extension(other_ext) = other else {
             return None;
         };
@@ -198,7 +198,7 @@ impl ExtVTable for Timestamp {
         ))
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         vortex_ensure!(
             matches!(ext_dtype.storage_dtype(), DType::Primitive(PType::I64, _)),
             "Timestamp storage dtype must be i64"
@@ -207,7 +207,6 @@ impl ExtVTable for Timestamp {
     }
 
     fn unpack_native<'a>(
-        &self,
         ext_dtype: &'a ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-array/src/extension/tests/divisible_int.rs b/vortex-array/src/extension/tests/divisible_int.rs
index 7b6e501b7cb..5f07573a0f3 100644
--- a/vortex-array/src/extension/tests/divisible_int.rs
+++ b/vortex-array/src/extension/tests/divisible_int.rs
@@ -51,10 +51,7 @@ impl ExtVTable for DivisibleInt {
         Ok(Divisor(n))
     }
 
-    fn validate_dtype(
-        &self,
-        ext_dtype: &crate::dtype::extension::ExtDType<Self>,
-    ) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &crate::dtype::extension::ExtDType<Self>) -> VortexResult<()> {
         vortex_ensure!(
             matches!(ext_dtype.storage_dtype(), DType::Primitive(PType::U64, _)),
             "divisible int storage dtype must be u64"
@@ -63,7 +60,6 @@ impl ExtVTable for DivisibleInt {
     }
 
     fn unpack_native<'a>(
-        &self,
         ext_dtype: &'a crate::dtype::extension::ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-array/src/extension/uuid/vtable.rs b/vortex-array/src/extension/uuid/vtable.rs
index 962b83f8907..c76c7352942 100644
--- a/vortex-array/src/extension/uuid/vtable.rs
+++ b/vortex-array/src/extension/uuid/vtable.rs
@@ -47,7 +47,7 @@ impl ExtVTable for Uuid {
         Ok(UuidMetadata { version })
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         let storage_dtype = ext_dtype.storage_dtype();
         let DType::FixedSizeList(element_dtype, list_size, _nullability) = storage_dtype else {
             vortex_bail!("UUID storage dtype must be a FixedSizeList, got {storage_dtype}");
@@ -77,7 +77,6 @@ impl ExtVTable for Uuid {
     }
 
     fn unpack_native<'a>(
-        &self,
         ext_dtype: &ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
@@ -248,7 +247,7 @@ mod tests {
         let storage_value = storage_scalar
             .value()
             .ok_or_else(|| vortex_error::vortex_err!("expected non-null scalar"))?;
-        let result = Uuid.unpack_native(&ext_dtype, storage_value)?;
+        let result = Uuid::unpack_native(&ext_dtype, storage_value)?;
         assert_eq!(result, expected);
         assert_eq!(result.to_string(), "550e8400-e29b-41d4-a716-446655440000");
         Ok(())
@@ -283,7 +282,7 @@ mod tests {
         let storage_value = storage_scalar
             .value()
             .ok_or_else(|| vortex_error::vortex_err!("expected non-null scalar"))?;
-        assert!(Uuid.unpack_native(&ext_dtype, storage_value).is_err());
+        assert!(Uuid::unpack_native(&ext_dtype, storage_value).is_err());
         Ok(())
     }
 
@@ -317,7 +316,7 @@ mod tests {
         .unwrap();
         let storage_value = uuid_storage_scalar(&v4_uuid);
 
-        let result = Uuid.unpack_native(&ext_dtype, &storage_value)?;
+        let result = Uuid::unpack_native(&ext_dtype, &storage_value)?;
         assert_eq!(result, v4_uuid);
         Ok(())
     }
@@ -335,7 +334,7 @@ mod tests {
         .unwrap();
         let storage_value = uuid_storage_scalar(&v4_uuid);
 
-        let result = Uuid.unpack_native(&ext_dtype, &storage_value)?;
+        let result = Uuid::unpack_native(&ext_dtype, &storage_value)?;
         assert_eq!(result, v4_uuid);
         Ok(())
     }
diff --git a/vortex-array/src/scalar/arrow.rs b/vortex-array/src/scalar/arrow.rs
index ac9fda0ee5e..f5051ceaf21 100644
--- a/vortex-array/src/scalar/arrow.rs
+++ b/vortex-array/src/scalar/arrow.rs
@@ -466,14 +466,12 @@ mod tests {
             }
 
             fn validate_dtype(
-                &self,
                 _ext_dtype: &crate::dtype::extension::ExtDType<Self>,
             ) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                &self,
                 _ext_dtype: &'a crate::dtype::extension::ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-array/src/scalar/tests/casting.rs b/vortex-array/src/scalar/tests/casting.rs
index e5677f7c1f9..4e6ecdd60b9 100644
--- a/vortex-array/src/scalar/tests/casting.rs
+++ b/vortex-array/src/scalar/tests/casting.rs
@@ -43,12 +43,11 @@ mod tests {
             Ok(0)
         }
 
-        fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+        fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
             Ok(())
         }
 
         fn unpack_native<'a>(
-            &self,
             _ext_dtype: &'a ExtDType<Self>,
             _storage_value: &'a ScalarValue,
         ) -> VortexResult<Self::NativeValue<'a>> {
@@ -259,12 +258,11 @@ mod tests {
                 vortex_bail!("not implemented")
             }
 
-            fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+            fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                &self,
                 _ext_dtype: &'a ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
@@ -317,12 +315,11 @@ mod tests {
                 vortex_bail!("not implemented")
             }
 
-            fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+            fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                &self,
                 _ext_dtype: &'a ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-array/src/scalar/typed_view/extension/tests.rs b/vortex-array/src/scalar/typed_view/extension/tests.rs
index 4801e8e6e0c..5faa9550402 100644
--- a/vortex-array/src/scalar/typed_view/extension/tests.rs
+++ b/vortex-array/src/scalar/typed_view/extension/tests.rs
@@ -32,12 +32,11 @@ impl ExtVTable for TestI32Ext {
         Ok(EmptyMetadata)
     }
 
-    fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         Ok(())
     }
 
     fn unpack_native<'a>(
-        &self,
         _ext_dtype: &'a ExtDType<Self>,
         _storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
@@ -116,12 +115,11 @@ fn test_ext_scalar_partial_ord_different_types() {
             Ok(EmptyMetadata)
         }
 
-        fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+        fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
             Ok(())
         }
 
         fn unpack_native<'a>(
-            &self,
             _ext_dtype: &'a ExtDType<Self>,
             _storage_value: &'a ScalarValue,
         ) -> VortexResult<Self::NativeValue<'a>> {
@@ -299,12 +297,11 @@ fn test_ext_scalar_with_metadata() {
             vortex_bail!("not implemented")
         }
 
-        fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+        fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
             Ok(())
         }
 
         fn unpack_native<'a>(
-            &self,
             _ext_dtype: &'a ExtDType<Self>,
             _storage_value: &'a ScalarValue,
         ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-duckdb/src/convert/dtype.rs b/vortex-duckdb/src/convert/dtype.rs
index e96fa838f63..ad66787f02e 100644
--- a/vortex-duckdb/src/convert/dtype.rs
+++ b/vortex-duckdb/src/convert/dtype.rs
@@ -594,12 +594,11 @@ mod tests {
                 Ok(EmptyMetadata)
             }
 
-            fn validate_dtype(&self, _ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+            fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                &self,
                 _ext_dtype: &'a ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-tensor/public-api.lock b/vortex-tensor/public-api.lock
index 2b84eef114f..18107f84db4 100644
--- a/vortex-tensor/public-api.lock
+++ b/vortex-tensor/public-api.lock
@@ -40,9 +40,9 @@ pub fn vortex_tensor::fixed_shape::FixedShapeTensor::id(&self) -> vortex_array::
 
 pub fn vortex_tensor::fixed_shape::FixedShapeTensor::serialize_metadata(&self, metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_tensor::fixed_shape::FixedShapeTensor::unpack_native<'a>(&self, _ext_dtype: &'a vortex_array::dtype::extension::typed::ExtDType<Self>, storage_value: &'a vortex_array::scalar::scalar_value::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_tensor::fixed_shape::FixedShapeTensor::unpack_native<'a>(_ext_dtype: &'a vortex_array::dtype::extension::typed::ExtDType<Self>, storage_value: &'a vortex_array::scalar::scalar_value::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_tensor::fixed_shape::FixedShapeTensor::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::typed::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_tensor::fixed_shape::FixedShapeTensor::validate_dtype(ext_dtype: &vortex_array::dtype::extension::typed::ExtDType<Self>) -> vortex_error::VortexResult<()>
 
 pub struct vortex_tensor::fixed_shape::FixedShapeTensorMetadata
 
@@ -220,6 +220,6 @@ pub fn vortex_tensor::vector::Vector::id(&self) -> vortex_array::dtype::extensio
 
 pub fn vortex_tensor::vector::Vector::serialize_metadata(&self, _metadata: &Self::Metadata) -> vortex_error::VortexResult<alloc::vec::Vec<u8>>
 
-pub fn vortex_tensor::vector::Vector::unpack_native<'a>(&self, _ext_dtype: &'a vortex_array::dtype::extension::typed::ExtDType<Self>, storage_value: &'a vortex_array::scalar::scalar_value::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
+pub fn vortex_tensor::vector::Vector::unpack_native<'a>(_ext_dtype: &'a vortex_array::dtype::extension::typed::ExtDType<Self>, storage_value: &'a vortex_array::scalar::scalar_value::ScalarValue) -> vortex_error::VortexResult<Self::NativeValue>
 
-pub fn vortex_tensor::vector::Vector::validate_dtype(&self, ext_dtype: &vortex_array::dtype::extension::typed::ExtDType<Self>) -> vortex_error::VortexResult<()>
+pub fn vortex_tensor::vector::Vector::validate_dtype(ext_dtype: &vortex_array::dtype::extension::typed::ExtDType<Self>) -> vortex_error::VortexResult<()>
diff --git a/vortex-tensor/src/fixed_shape/vtable.rs b/vortex-tensor/src/fixed_shape/vtable.rs
index 136bb4b4718..3c0b6512a65 100644
--- a/vortex-tensor/src/fixed_shape/vtable.rs
+++ b/vortex-tensor/src/fixed_shape/vtable.rs
@@ -33,7 +33,7 @@ impl ExtVTable for FixedShapeTensor {
         proto::deserialize(metadata)
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         let storage_dtype = ext_dtype.storage_dtype();
         let DType::FixedSizeList(element_dtype, list_size, _nullability) = storage_dtype else {
             vortex_bail!(
@@ -64,7 +64,6 @@ impl ExtVTable for FixedShapeTensor {
     }
 
     fn unpack_native<'a>(
-        &self,
         _ext_dtype: &'a ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
diff --git a/vortex-tensor/src/vector/vtable.rs b/vortex-tensor/src/vector/vtable.rs
index 6ab849ab4e9..61a0f35d9ff 100644
--- a/vortex-tensor/src/vector/vtable.rs
+++ b/vortex-tensor/src/vector/vtable.rs
@@ -31,7 +31,7 @@ impl ExtVTable for Vector {
         Ok(EmptyMetadata)
     }
 
-    fn validate_dtype(&self, ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         let storage_dtype = ext_dtype.storage_dtype();
         let DType::FixedSizeList(element_dtype, _list_size, _nullability) = storage_dtype else {
             vortex_bail!("Vector storage dtype must be a FixedSizeList, got {storage_dtype}");
@@ -50,7 +50,6 @@ impl ExtVTable for Vector {
     }
 
     fn unpack_native<'a>(
-        &self,
         _ext_dtype: &'a ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {

From 8f878ac33d367ceda6aefd4964b890b6825b9164 Mon Sep 17 00:00:00 2001
From: Nicholas Gates <nick@nickgates.com>
Date: Fri, 20 Mar 2026 17:10:20 -0400
Subject: [PATCH 2/2] Only pass vtable once via ExtDType<V>

Signed-off-by: Nicholas Gates <nick@nickgates.com>
---
 vortex-array/src/extension/tests/divisible_int.rs | 5 +++--
 vortex-array/src/scalar/arrow.rs                  | 7 +++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/vortex-array/src/extension/tests/divisible_int.rs b/vortex-array/src/extension/tests/divisible_int.rs
index 5f07573a0f3..8b9612e9438 100644
--- a/vortex-array/src/extension/tests/divisible_int.rs
+++ b/vortex-array/src/extension/tests/divisible_int.rs
@@ -11,6 +11,7 @@ use vortex_error::vortex_ensure;
 
 use crate::dtype::DType;
 use crate::dtype::PType;
+use crate::dtype::extension::ExtDType;
 use crate::dtype::extension::ExtId;
 use crate::dtype::extension::ExtVTable;
 use crate::scalar::ScalarValue;
@@ -51,7 +52,7 @@ impl ExtVTable for DivisibleInt {
         Ok(Divisor(n))
     }
 
-    fn validate_dtype(ext_dtype: &crate::dtype::extension::ExtDType<Self>) -> VortexResult<()> {
+    fn validate_dtype(ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
         vortex_ensure!(
             matches!(ext_dtype.storage_dtype(), DType::Primitive(PType::U64, _)),
             "divisible int storage dtype must be u64"
@@ -60,7 +61,7 @@ impl ExtVTable for DivisibleInt {
     }
 
     fn unpack_native<'a>(
-        ext_dtype: &'a crate::dtype::extension::ExtDType<Self>,
+        ext_dtype: &'a ExtDType<Self>,
         storage_value: &'a ScalarValue,
     ) -> VortexResult<Self::NativeValue<'a>> {
         let value = storage_value.as_primitive().cast::<u64>()?;
diff --git a/vortex-array/src/scalar/arrow.rs b/vortex-array/src/scalar/arrow.rs
index f5051ceaf21..73142281b0d 100644
--- a/vortex-array/src/scalar/arrow.rs
+++ b/vortex-array/src/scalar/arrow.rs
@@ -203,6 +203,7 @@ mod tests {
     use crate::dtype::Nullability;
     use crate::dtype::PType;
     use crate::dtype::StructFields;
+    use crate::dtype::extension::ExtDType;
     use crate::dtype::extension::ExtId;
     use crate::dtype::extension::ExtVTable;
     use crate::dtype::i256;
@@ -465,14 +466,12 @@ mod tests {
                 vortex_bail!("not implemented")
             }
 
-            fn validate_dtype(
-                _ext_dtype: &crate::dtype::extension::ExtDType<Self>,
-            ) -> VortexResult<()> {
+            fn validate_dtype(_ext_dtype: &ExtDType<Self>) -> VortexResult<()> {
                 Ok(())
             }
 
             fn unpack_native<'a>(
-                _ext_dtype: &'a crate::dtype::extension::ExtDType<Self>,
+                _ext_dtype: &'a ExtDType<Self>,
                 _storage_value: &'a ScalarValue,
             ) -> VortexResult<Self::NativeValue<'a>> {
                 Ok("")