refactor(postgres): fix tests

This commit refactors the error handling in PgRecordDecoder by removing the redundant use of the MismatchedTypeError, streamlining the return of mismatched type errors. The changes enhance code clarity and maintainability in type decoding scenarios.

Author: lovasoa

sqlx-core/src/postgres/types/record.rs

@@ -2,7 +2,7 @@ use bytes::Buf;
 
 use crate::decode::Decode;
 use crate::encode::Encode;
-use crate::error::{mismatched_types, BoxDynError};
+use crate::error::BoxDynError;
 use crate::postgres::type_info::{PgType, PgTypeKind};
 use crate::postgres::types::Oid;
 use crate::postgres::{PgArgumentBuffer, PgTypeInfo, PgValueFormat, PgValueRef, Postgres};
@@ -127,9 +127,7 @@ impl<'r> PgRecordDecoder<'r> {
 
                 if let Some(ty) = &element_type_opt {
                     if !ty.is_null() && !T::compatible(ty) {
-                        return Err(crate::error::Error::MismatchedType(
-                            crate::error::mismatched_types::<Postgres, T>(ty),
-                        ));
+                        return Err(crate::error::mismatched_types::<Postgres, T>(ty));
                     }
                 }