nit

vortex-zigzag/src/compress.rs

@@ -3,7 +3,7 @@ use vortex::compress::{CompressConfig, CompressCtx, EncodingCompression};
 use vortex::ptype::{NativePType, PType};
 use vortex::stats::{ArrayStatistics, Stat};
 use vortex::validity::Validity;
-use vortex::{Array, ArrayDef, AsArray, IntoArray, OwnedArray, ToStatic};
+use vortex::{Array, ArrayDef, AsArray, IntoArray, OwnedArray};
 use vortex_alloc::{AlignedVec, ALIGNED_ALLOCATOR};
 use vortex_error::VortexResult;
 use zigzag::ZigZag as ExternalZigZag;
@@ -28,7 +28,7 @@ impl EncodingCompression for ZigZagEncoding {
         // TODO(ngates): also check that Stat::Max is less than half the max value of the type
         parray
             .statistics()
-            .compute_as::<i64>(Stat::Min)
+            .compute_as_cast::<i64>(Stat::Min)
             .filter(|&min| min < 0)
             .map(|_| self as &dyn EncodingCompression)
     }
@@ -41,10 +41,6 @@ impl EncodingCompression for ZigZagEncoding {
         ctx: CompressCtx,
     ) -> VortexResult<OwnedArray> {
         let zigzag_like = like.map(|like_arr| like_arr.as_array_ref());
-
-        if array.encoding().id() == ZigZag::ID {
-            return Ok(array.clone().to_static());
-        }
         let encoded = if array.encoding().id() == ZigZag::ID {
             zigzag_encode(&array.as_primitive())?
         } else {
@@ -120,4 +116,4 @@ where
     } else {
         PrimitiveArray::from(encoded.to_vec())
     }
-}
+}