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https://issues.apache.org/jira/browse/BEAM-11157?focusedWorklogId=506615&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-506615
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ASF GitHub Bot logged work on BEAM-11157:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Oct/20 09:43
Start Date: 30/Oct/20 09:43
Worklog Time Spent: 10m
Work Description: rworley-monster edited a comment on pull request #13229:
URL: https://github.com/apache/beam/pull/13229#issuecomment-719448639
A Schema enum is written to a BigQuery string field, but the same BigQuery
string field is read back into a Schema string field. I'm not sure if there is
a practical/good way to recreate the Schema enum when reading from BigQuery.
Would that be a requirement for this enhancement?
Brainstorming options:
1. The enum value set could be stored in the BigQuery field description, but
this is brittle because the description can be altered/corrupted by third
parties and I'm not sure how practical it would be to update the description
when the enum value set changes.
2. Add a method `SchemaConversionOptions.setParseEnums(Map<String,
Enum<E>>)`, but this assumes that an enum value is never renamed or removed.
What to do with a value in the BigQuery table that no longer maps to a value in
the provided enum? Create `EnumerationType.Value(-1)` and the user will see
the value as null? Add the unexpected value to a new EnumerationType instance
(if practical to update the Schema while iterating TableRows)?
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Issue Time Tracking
-------------------
Worklog Id: (was: 506615)
Time Spent: 40m (was: 0.5h)
> Write Schema enum to BigQuery string field
> ------------------------------------------
>
> Key: BEAM-11157
> URL: https://issues.apache.org/jira/browse/BEAM-11157
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Ryan Worley
> Assignee: Ryan Worley
> Priority: P2
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently it is an error to try to write a Schema enum to a BigQuery table.
> This enhancement will write a Schema enum value to a BigQuery string field.
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