diff --git a/sqlx-core/src/postgres/types/bool.rs b/sqlx-core/src/postgres/types/bool.rs
index 4deabfb82..ee1d1be29 100644
--- a/sqlx-core/src/postgres/types/bool.rs
+++ b/sqlx-core/src/postgres/types/bool.rs
@@ -19,9 +19,9 @@ impl Type<Postgres> for [bool] {
         PgTypeInfo::new(TypeId::ARRAY_BOOL, "BOOL[]")
     }
 }
-impl HasSqlType<Vec<bool>> for Postgres {
+impl Type<Postgres> for Vec<bool> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[bool]>>::type_info()
+        <[bool] as Type<Postgres>>::type_info()
     }
 }
 
diff --git a/sqlx-core/src/postgres/types/float.rs b/sqlx-core/src/postgres/types/float.rs
index 51614e397..f9abe6cb5 100644
--- a/sqlx-core/src/postgres/types/float.rs
+++ b/sqlx-core/src/postgres/types/float.rs
@@ -22,9 +22,9 @@ impl Type<Postgres> for [f32] {
         PgTypeInfo::new(TypeId::ARRAY_FLOAT4, "FLOAT4[]")
     }
 }
-impl HasSqlType<Vec<f32>> for Postgres {
+impl Type<Postgres> for Vec<f32> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[f32]>>::type_info()
+        <[f32] as Type<Postgres>>::type_info()
     }
 }
 
@@ -58,9 +58,9 @@ impl Type<Postgres> for [f64] {
         PgTypeInfo::new(TypeId::ARRAY_FLOAT8, "FLOAT8[]")
     }
 }
-impl HasSqlType<Vec<f64>> for Postgres {
+impl Type<Postgres> for Vec<f64> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[f64]>>::type_info()
+        <[f64] as Type<Postgres>>::type_info()
     }
 }
 
diff --git a/sqlx-core/src/postgres/types/int.rs b/sqlx-core/src/postgres/types/int.rs
index 96cddc9b5..05ef1ce61 100644
--- a/sqlx-core/src/postgres/types/int.rs
+++ b/sqlx-core/src/postgres/types/int.rs
@@ -22,9 +22,9 @@ impl Type<Postgres> for [i16] {
         PgTypeInfo::new(TypeId::ARRAY_INT2, "INT2[]")
     }
 }
-impl HasSqlType<Vec<i16>> for Postgres {
+impl Type<Postgres> for Vec<i16> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[i16]>>::type_info()
+        <[i16] as Type<Postgres>>::type_info()
     }
 }
 
@@ -54,9 +54,9 @@ impl Type<Postgres> for [i32] {
         PgTypeInfo::new(TypeId::ARRAY_INT4, "INT4[]")
     }
 }
-impl HasSqlType<Vec<i32>> for Postgres {
+impl Type<Postgres> for Vec<i32> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[i32]>>::type_info()
+        <[i32] as Type<Postgres>>::type_info()
     }
 }
 
@@ -86,9 +86,9 @@ impl Type<Postgres> for [i64] {
         PgTypeInfo::new(TypeId::ARRAY_INT8, "INT8[]")
     }
 }
-impl HasSqlType<Vec<i64>> for Postgres {
+impl Type<Postgres> for Vec<i64> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[i64]>>::type_info()
+        <[i64] as Type<Postgres>>::type_info()
     }
 }
 
diff --git a/sqlx-core/src/postgres/types/str.rs b/sqlx-core/src/postgres/types/str.rs
index 6012e594f..f9127f911 100644
--- a/sqlx-core/src/postgres/types/str.rs
+++ b/sqlx-core/src/postgres/types/str.rs
@@ -21,9 +21,10 @@ impl Type<Postgres> for [&'_ str] {
         PgTypeInfo::new(TypeId::ARRAY_TEXT, "TEXT[]")
     }
 }
-impl HasSqlType<Vec<&'_ str>> for Postgres {
+
+impl Type<Postgres> for Vec<&'_ str> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[&'_ str]>>::type_info()
+        <[&'_ str] as Type<Postgres>>::type_info()
     }
 }
 
@@ -32,14 +33,16 @@ impl Type<Postgres> for String {
         <str as Type<Postgres>>::type_info()
     }
 }
-impl HasSqlType<[String]> for Postgres {
+
+impl Type<Postgres> for [String] {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<[&'_ str]>>::type_info()
+        <[&'_ str] as Type<Postgres>>::type_info()
     }
 }
-impl HasSqlType<Vec<String>> for Postgres {
+
+impl Type<Postgres> for Vec<String> {
     fn type_info() -> PgTypeInfo {
-        <Self as HasSqlType<Vec<&'_ str>>>::type_info()
+        <Vec<&'_ str> as Type<Postgres>>::type_info()
     }
 }
 
diff --git a/sqlx-core/src/postgres/types/uuid.rs b/sqlx-core/src/postgres/types/uuid.rs
index a5aae9478..c9b14d17e 100644
--- a/sqlx-core/src/postgres/types/uuid.rs
+++ b/sqlx-core/src/postgres/types/uuid.rs
@@ -23,7 +23,7 @@ impl Type<Postgres> for [Uuid] {
     }
 }
 
-impl HasSqlType<Vec<Uuid>> for Postgres {
+impl Type<Postgres> for Vec<Uuid> {
     fn type_info() -> PgTypeInfo {
         <Postgres as HasSqlType<[Uuid]>>::type_info()
     }