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https://issues.apache.org/jira/browse/PIG-4447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ratandeep Ratti updated PIG-4447:
---------------------------------
Attachment: pig.patch
Attaching patch with testcases for nullable values (records and arrays) in a map
> Pig Cannot handle nullable values (arrays and records) in avro records
> ----------------------------------------------------------------------
>
> Key: PIG-4447
> URL: https://issues.apache.org/jira/browse/PIG-4447
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.13.0
> Reporter: Ratandeep Ratti
> Assignee: Ratandeep Ratti
> Fix For: 0.15.0
>
> Attachments: pig.patch
>
>
> Here's an example of an avro schema containing nullable values in a map
> {noformat}
> {
> "name" : "nullableRecordInMap",
> "namespace" : "org.apache.pig.test.builtin",
> "type" : "record",
> "fields" : [
> {"name" : "key", "type" : "string"},
> {"name" : "value", "type" : "int"},
> {
> "name" : "parameters",
> "type": [
> "null",
> {
> "type": "map",
> "values": [
> "null",
> {
> "type": "record",
> "name": "nullable_record",
> "fields": [
> {
> "name": "id",
> "type": [
> "null",
> "string"
> ]
> }
> ]
> }
> ]
> }
> ]
> }
> ]
> }
> {noformat}
> Here's the corresponding Pig resource schema on running it through
> org.apache.pig.impl.util.avro.AvroStorageSchemaConversionUtilities
> {noformat}
> key:chararray,value:int,parameters:[nullable_record:(union:(id:chararray))]
> {noformat}
> Note that Pig should unpack the underlying schema from the nullable union and
> the Pig schema should be
> {noformat}
> key:chararray,value:int,parameters:[nullable_record:(id:chararray)]
> {noformat}
> There's similar behavior if the nullal map value is of type Avro
> I've created a patch with a few testcases written.
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