Full value converter refactor

Author: chandr-andr

python/tests/test_value_converter.py

@@ -1187,6 +1187,11 @@ async def test_empty_array(
             VarCharArray([]),
             [],
         ),
+        (
+            "VARCHAR ARRAY",
+            [],
+            [],
+        ),
         (
             "TEXT ARRAY",
             TextArray([]),

src/driver/inner_connection.rs

@@ -29,10 +29,8 @@ impl PsqlpyConnection {
                 if prepared {
                     return Ok(pconn.prepare_cached(query).await?);
                 } else {
-                    pconn.batch_execute("BEGIN").await?;
                     let prepared = pconn.prepare(query).await?;
                     self.drop_prepared(&prepared).await?;
-                    pconn.batch_execute("COMMIT").await?;
                     return Ok(prepared);
                 }
             }