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https://issues.apache.org/jira/browse/BEAM-7886?focusedWorklogId=290890&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-290890
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ASF GitHub Bot logged work on BEAM-7886:
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Author: ASF GitHub Bot
Created on: 08/Aug/19 00:09
Start Date: 08/Aug/19 00:09
Worklog Time Spent: 10m
Work Description: robinyqiu commented on pull request #9188: [BEAM-7886]
Make row coder a standard coder and implement in Python
URL: https://github.com/apache/beam/pull/9188#discussion_r311179276
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File path: model/pipeline/src/main/proto/beam_runner_api.proto
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@@ -642,6 +642,45 @@ message StandardCoders {
// Components: Coder for a single element.
// Experimental.
STATE_BACKED_ITERABLE = 9 [(beam_urn) =
"beam:coder:state_backed_iterable:v1"];
+
+ // Additional Standard Coders
+ // --------------------------
+ // The following coders are not required to be implemented for an SDK or
+ // runner to support the Beam model, but can enable additional
+ // functionality.
+
+ // Encodes a "row", an element with a known schema, defined by an
+ // instance of Schema from schema.proto.
+ //
+ // A row is encoded as the concatenation of:
+ // - The number of attributes in the schema, encoded with
+ // beam:coder:varint:v1. This is useful for detecting supported schema
+ // changes (column additions/deletions).
Review comment:
Can we explains in more detail what "supported schema changes" means here?
Is it only useful for the streaming pipeline update case?
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Issue Time Tracking
-------------------
Worklog Id: (was: 290890)
Time Spent: 1h (was: 50m)
> Make row coder a standard coder and implement in python
> -------------------------------------------------------
>
> Key: BEAM-7886
> URL: https://issues.apache.org/jira/browse/BEAM-7886
> Project: Beam
> Issue Type: Improvement
> Components: beam-model, sdk-java-core, sdk-py-core
> Reporter: Brian Hulette
> Assignee: Brian Hulette
> Priority: Major
> Time Spent: 1h
> Remaining Estimate: 0h
>
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