fix: Removed internal system columns and fixed quoting

Author: MisterWheatley

sqlmesh/core/engine_adapter/risingwave.py

@@ -44,11 +44,19 @@ def columns(
             .from_("rw_catalog.rw_columns")
             .join("rw_catalog.rw_relations", on="rw_relations.id=rw_columns.relation_id")
             .join("rw_catalog.rw_schemas", on="rw_schemas.id=rw_relations.schema_id")
-            .where(exp.column("name",db="rw_relations",quoted=False).eq(table.alias_or_name))
+            .where(
+                exp.and_(
+                    exp.column("name", db="rw_relations").eq(table.alias_or_name),
+                    exp.column("name", db="rw_columns").neq("_row_id"),
+                    exp.column("name", db="rw_columns").neq("_rw_timestamp"),
+                )
+            )
         )
 
         if table.args.get("db"):
-            sql = sql.where(exp.column("name",db="rw_schemas",quoted=False).eq(table.args["db"].name))
+            sql = sql.where(
+                exp.column("name", db="rw_schemas", quoted=False).eq(table.args["db"].name)
+            )
 
         self.execute(sql)
         resp = self.cursor.fetchall()