downgrade Pool<Posgres> copy_in_raw/out_row to take &self

Author: akiradeveloper

sqlx-core/src/postgres/copy.rs

@@ -76,7 +76,7 @@ impl Pool<Postgres> {
     /// [PgCopyIn::finish] or [PgCopyIn::abort] *must* be called when finished or the connection
     /// will return an error the next time it is used.
     pub async fn copy_in_raw(
-        &mut self,
+        &self,
         statement: &str,
     ) -> Result<PgCopyIn<PoolConnection<Postgres>>> {
         PgCopyIn::begin(self.acquire().await?, statement).await
@@ -102,7 +102,7 @@ impl Pool<Postgres> {
     /// Command examples and accepted formats for `COPY` data are shown here:
     /// https://www.postgresql.org/docs/current/sql-copy.html
     pub async fn copy_out_raw(
-        &mut self,
+        &self,
         statement: &str,
     ) -> Result<BoxStream<'static, Result<Bytes>>> {
         pg_begin_copy_out(self.acquire().await?, statement).await