diff --git a/src/types/from_sql.rs b/src/types/from_sql.rs
index 8a01079..6eb9aef 100644
--- a/src/types/from_sql.rs
+++ b/src/types/from_sql.rs
@@ -175,8 +175,64 @@ impl<'a> FromSql<'a> for uuid::Uuid {
     }
 }
 
+// macro_rules! from_sql_vec_impl {
+//     ( $( $t:ty: $k:pat => $f:expr ),* ) => {
+//         $(
+//             impl<'a> FromSql<'a> for Vec<$t> {
+//                 fn from_sql(value: ValueRef<'a>) -> FromSqlResult<Self> {
+//                     match value {
+//                         ValueRef::Array($k, vs) => {
+//                             let f: fn(ValueRef<'a>) -> FromSqlResult<$t> = $f;
+//                             let mut result = Vec::with_capacity(vs.len());
+//                             for r in vs.iter() {
+//                                 let value: $t = f(r.clone())?;
+//                                 result.push(value);
+//                             }
+//                             Ok(result)
+//                         }
+//                         _ => {
+//                             let from = SqlType::from(value.clone()).to_string();
+//                             Err(Error::FromSql(FromSqlError::InvalidType {
+//                                 src: from,
+//                                 dst: format!("Vec<{}>", stringify!($t)).into(),
+//                             }))
+//                         }
+//                     }
+//                 }
+//             }
+//         )*
+//         // New implementation for nested Vec<Vec<T>>
+//         $(
+//             impl<'a> FromSql<'a> for Vec<Vec<$t>> {
+//                 fn from_sql(value: ValueRef<'a>) -> FromSqlResult<Self> {
+//                     match value {
+//                         ValueRef::Array(SqlType::Array(_), outer_vs) => {
+//                             outer_vs.iter().map(|outer_v| match outer_v {
+//                                 ValueRef::Array($k, inner_vs) => {
+//                                     let f: fn(ValueRef<'a>) -> FromSqlResult<$t> = $f;
+//                                     inner_vs.iter().map(|inner_v| f(inner_v.clone())).collect()
+//                                 },
+//                                 _ => Err(Error::FromSql(FromSqlError::InvalidType {
+//                                     src: SqlType::from(outer_v.clone()).to_string(),
+//                                     dst: format!("Vec<Vec<{}>>", stringify!($t)).into(),
+//                                 })),
+//                             }).collect()
+//                         },
+//                         _ => Err(Error::FromSql(FromSqlError::InvalidType {
+//                             src: SqlType::from(value.clone()).to_string(),
+//                             dst: "Vec<Vec<_>>".into(),
+//                         })),
+//                     }
+//                 }
+//             }
+//         )*
+
+//     };
+// }
 macro_rules! from_sql_vec_impl {
-    ( $( $t:ty: $k:pat => $f:expr ),* ) => {
+    (
+        $($t:ty: $k:pat => $f:expr),*
+    ) => {
         $(
             impl<'a> FromSql<'a> for Vec<$t> {
                 fn from_sql(value: ValueRef<'a>) -> FromSqlResult<Self> {
@@ -200,33 +256,37 @@ macro_rules! from_sql_vec_impl {
                     }
                 }
             }
-        )*
-        // New implementation for nested Vec<Vec<T>>
-        $(
+
             impl<'a> FromSql<'a> for Vec<Vec<$t>> {
                 fn from_sql(value: ValueRef<'a>) -> FromSqlResult<Self> {
                     match value {
                         ValueRef::Array(SqlType::Array(_), outer_vs) => {
-                            outer_vs.iter().map(|outer_v| match outer_v {
-                                ValueRef::Array($k, inner_vs) => {
-                                    let f: fn(ValueRef<'a>) -> FromSqlResult<$t> = $f;
-                                    inner_vs.iter().map(|inner_v| f(inner_v.clone())).collect()
-                                },
-                                _ => Err(Error::FromSql(FromSqlError::InvalidType {
-                                    src: SqlType::from(outer_v.clone()).to_string(),
-                                    dst: format!("Vec<Vec<{}>>", stringify!($t)).into(),
-                                })),
-                            }).collect()
-                        },
+                            let mut result = Vec::with_capacity(outer_vs.len());
+                            for outer_v in outer_vs.iter() {
+                                match outer_v {
+                                    ValueRef::Array($k, inner_vs) => {
+                                        let f: fn(ValueRef<'a>) -> FromSqlResult<$t> = $f;
+                                        let inner: Vec<$t> = inner_vs.iter().map(|inner_v| f(inner_v.clone())).collect::<std::result::Result<Vec<$t>, _>>()?;
+                                        result.push(inner);
+                                    }
+                                    _ => {
+                                        return Err(Error::FromSql(FromSqlError::InvalidType {
+                                            src: SqlType::from(outer_v.clone()).to_string(),
+                                            dst: format!("Vec<Vec<{}>>", stringify!($t)).into(),
+                                        }));
+                                    }
+                                }
+                            }
+                            Ok(result)
+                        }
                         _ => Err(Error::FromSql(FromSqlError::InvalidType {
                             src: SqlType::from(value.clone()).to_string(),
-                            dst: "Vec<Vec<_>>".into(),
+                            dst: format!("Vec<Vec<{}>>", stringify!($t)).into(),
                         })),
                     }
                 }
             }
         )*
-
     };
 }