Removed redundant MAX statement in the PostgreSQL append to stream function

Author: oskardudycz

src/packages/emmett-postgresql/src/eventStore/schema/appendToStream.ts

@@ -48,10 +48,10 @@ export const appendToStreamSQL = rawSql(
       v_transaction_id := pg_current_xact_id();
 
       IF v_expected_stream_position IS NULL THEN
-          SELECT COALESCE(max(stream_position), 0) INTO v_expected_stream_position
+          SELECT COALESCE(stream_position, 0) INTO v_expected_stream_position
           FROM ${streamsTable.name}
-          WHERE stream_id = v_stream_id AND partition = v_partition;
-      END IF;
+          WHERE stream_id = v_stream_id AND partition = v_partition AND is_archived = FALSE;
+      END IF;   
 
       v_next_stream_position := v_expected_stream_position + array_upper(v_messages_data, 1);
 
@@ -76,7 +76,7 @@ export const appendToStreamSQL = rawSql(
       WITH ev AS (
           SELECT row_number() OVER () + v_expected_stream_position AS stream_position, 
                 message_data, 
-                message_metadata, 
+                messAage_metadata, 
                 schema_version, 
                 message_id, 
                 message_type,