---
title: "Materialize v0.98"
date: 2024-05-08
released: true
patch: 7
---

## v0.98

#### Sources and sinks

* Support writing metadata to Kafka message headers in [Kafka sinks](/sql/create-sink/kafka/)
  via the new [`HEADERS` option](/sql/create-sink/kafka/#headers).

* Allow dropping subsources in PostgreSQL sources using the [`DROP SOURCE`](/sql/drop-source/)
  command. The `ALTER SOURCE...DROP SUBSOURCE` command has been removed.

* Require the `CASCADE` option to drop PostgreSQL and MySQL sources with active
  subsources. Previously, dropping a PostgreSQL or MySQL source automatically
  dropped all the corresponding subsources.

* Allow changing the ownership of a subsource using the [`ALTER OWNER`](/sql/alter-owner/)
  command. Subsources may now have different owners to the parent source.

#### SQL

* Add [`mz_internal.mz_postgres_source_tables`](/sql/system-catalog/mz_internal/#mz_postgres_source_tables) and [`mz_internal.mz_mysql_source_tables`](/sql/system-catalog/mz_internal/#mz_mysql_source_tables)
to the system catalog. These tables .