ASF GitHub Bot logged work on BEAM-7802:

                Author: ASF GitHub Bot
            Created on: 15/Aug/19 20:57
            Start Date: 15/Aug/19 20:57
    Worklog Time Spent: 10m 
      Work Description: iemejia commented on pull request #9130: [BEAM-7802] 
Expose a method to make an Avro-based PCollection into an Schema-based one
URL: https://github.com/apache/beam/pull/9130#discussion_r314495186

 File path: sdks/java/core/src/main/java/org/apache/beam/sdk/io/AvroIO.java
 @@ -186,6 +188,49 @@
  * scalability. Note that it may decrease performance if the filepattern 
matches only a small number
  * of files.
+ * <h3>Inferring Beam schemas from Avro files</h3>
+ *
+ * <p>If you want to use SQL or schema based operations on an Avro-based 
PCollection. You must
+ * configure the read transform to infer the Beam schema and automatically 
setup the Beam related
+ * coders by doing:
+ *
+ * <pre>{@code
+ * PCollection<AvroAutoGenClass> records =
+ *     p.apply(AvroIO.read(...).from(...).withBeamSchemas(true);
+ * }</pre>
+ *
+ * <h3>Inferring Beam schemas from Avro PCollections</h3>
+ *
+ * <p>If you created an Avro-based PCollection by other means e.g. reading 
records from Kafka or as
+ * the output of another PTransform. You may be interested on making your 
PCollection schema-aware
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Issue Time Tracking

    Worklog Id:     (was: 295756)
    Time Spent: 4h 40m  (was: 4.5h)

> Expose a method to make an Avro-based PCollection into an Schema-based one
> --------------------------------------------------------------------------
>                 Key: BEAM-7802
>                 URL: https://issues.apache.org/jira/browse/BEAM-7802
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Ismaël Mejía
>            Assignee: Ismaël Mejía
>            Priority: Minor
>          Time Spent: 4h 40m
>  Remaining Estimate: 0h
> Avro can infer the Schema for an Avro based PCollection by using the 
> `withBeamSchemas` method, however if the user created a PCollection with Avro 
> objects or IndexedRecord/GenericRecord, he needs to manually set the schema 
> (or coder). The idea is to expose a method in schema.AvroUtils to ease this.

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