[jira] [Created] (FLINK-19629) English words are spelled incorrectly and an example is not provided

["shizhengchao (Jira)" <ji...@apache.org>]

shizhengchao created FLINK-19629:
------------------------------------

             Summary: English words are spelled incorrectly and an example is not provided
                 Key: FLINK-19629
                 URL: https://issues.apache.org/jira/browse/FLINK-19629
             Project: Flink
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 1.11.2
            Reporter: shizhengchao
             Fix For: 1.12.0


the docs Connectors/Table & SQL Connectors/Formats/Avro:
 In addition to the types listed above, Flink supports reading/writing nullable types. Flink maps nullable types to Avro union(something, null), where something is the Avro type converted from Flink type.

avro have no union type, should be unions:
 Avro unions(something, null)

by the way, an example should be provided that reading/writing nullable types, such as this:
{code:java}
CREATE TABLE user_behavior (
  behavior STRING NULL
) WITH (
 'connector' = 'kafka',
 'topic' = 'user_behavior',
 'properties.bootstrap.servers' = 'localhost:9092',
 'properties.group.id' = 'testGroup',
 'format' = 'avro'
)
{code}



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