[FLINK-34509] docs: add missing "url" option for Debezium Avro

docs/content/docs/connectors/table/formats/debezium.md

@@ -44,7 +44,7 @@ However, currently Flink can't combine UPDATE_BEFORE and UPDATE_AFTER into a sin
 Dependencies
 ------------
 
-#### Debezium Avro
+#### Debezium Confluent Avro
 
 {{< sql_download_table "debezium-avro-confluent" >}}
 
@@ -85,7 +85,9 @@ Debezium provides a unified format for changelog, here is a simple example for a
 *Note: please refer to [Debezium documentation](https://debezium.io/documentation/reference/1.3/connectors/mysql.html#mysql-connector-events_debezium) about the meaning of each fields.*
 
 The MySQL `products` table has 4 columns (`id`, `name`, `description` and `weight`). The above JSON message is an update change event on the `products` table where the `weight` value of the row with `id = 111` is changed from `5.18` to `5.15`.
-Assuming this messages is synchronized to Kafka topic `products_binlog`, then we can use the following DDL to consume this topic and interpret the change events.
+Assuming this messages is synchronized to Kafka topic `products_binlog`, then we can use the following DDLs (for Debezium JSON and Debezium Confluent Avro) to consume this topic and interpret the change events.
+
+#### Debezium JSON DDL
 
 ```sql
 CREATE TABLE topic_products (
@@ -100,7 +102,6 @@ CREATE TABLE topic_products (
  'properties.bootstrap.servers' = 'localhost:9092',
  'properties.group.id' = 'testGroup',
  -- using 'debezium-json' as the format to interpret Debezium JSON messages
- -- please use 'debezium-avro-confluent' if Debezium encodes messages in Avro format
  'format' = 'debezium-json'
 )
 ```
@@ -133,7 +134,30 @@ In some cases, users may setup the Debezium Kafka Connect with the Kafka configu
 
 In order to interpret such messages, you need to add the option `'debezium-json.schema-include' = 'true'` into above DDL WITH clause (`false` by default). Usually, this is not recommended to include schema because this makes the messages very verbose and reduces parsing performance.
 
-After registering the topic as a Flink table, then you can consume the Debezium messages as a changelog source.
+#### Debezium Confluent Avro DDL
+
+```sql
+CREATE TABLE topic_products (
+  -- schema is totally the same to the MySQL "products" table
+  id BIGINT,
+  name STRING,
+  description STRING,
+  weight DECIMAL(10, 2)
+) WITH (
+ 'connector' = 'kafka',
+ 'topic' = 'products_binlog',
+ 'properties.bootstrap.servers' = 'localhost:9092',
+ 'properties.group.id' = 'testGroup',
+ -- using 'debezium-avro-confluent' as the format to interpret Debezium Avro messages
+ 'format' = 'debezium-avro-confluent',
+ -- the URL to the schema registry for Kafka
+ 'debezium-avro-confluent.url' = 'http://localhost:8081'
+)
+```
+
+#### Producing Results
+
+For every data format, after registering the topic as a Flink table, you can consume the Debezium messages as a changelog source.
 
 ```sql
 -- a real-time materialized view on the MySQL "products"
@@ -234,8 +258,8 @@ CREATE TABLE KafkaTable (
 Format Options
 ----------------
 
-Flink provides `debezium-avro-confluent` and `debezium-json` formats to interpret Avro or Json messages produced by Debezium.
-Use format `debezium-avro-confluent` to interpret Debezium Avro messages and format `debezium-json` to interpret Debezium Json messages.
+Flink provides `debezium-avro-confluent` and `debezium-json` formats to interpret Avro or JSON messages produced by Debezium.
+Use format `debezium-avro-confluent` to interpret Debezium Avro messages and format `debezium-json` to interpret Debezium JSON messages.
 
 {{< tabs "a8edce02-58d5-4e0b-bc4b-75d05a98a0f9" >}}
 {{< tab "Debezium Avro" >}}