stevenzwu commented on code in PR #9728:
URL: https://github.com/apache/iceberg/pull/9728#discussion_r1493074229
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format/spec.md:
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@@ -1237,17 +1237,36 @@ Content file (data or delete) is serialized as a JSON
object according to the fo
| **`equality-ids`** |`JSON list of int: Field ids used to determine row
equality in equality delete files`|`[1]`|
| **`sort-order-id`** |`JSON int`|`1`|
-### File Scan Task Serialization
-
-File scan task is serialized as a JSON object according to the following table.
-
-| Metadata field |JSON representation|Example|
-|--------------------------|--- |--- |
-| **`schema`** |`JSON object`|`See above, read schemas instead`|
-| **`spec`** |`JSON object`|`See above, read partition specs
instead`|
-| **`data-file`** |`JSON object`|`See above, read content file instead`|
-| **`delete-files`** |`JSON list of objects`|`See above, read content file
instead`|
-| **`residual-filter`** |`JSON object: residual filter
expression`|`{"type":"eq","term":"id","value":1}`|
+### Task Serialization
Review Comment:
Flink source checkpoints pending splits of `FileScanTask`. The
standardization of JSON serialization scan task is used by both REST OpenAPI
and Flink (checkpoint and job manager -> task manager split assignment). I
would imagine if Spark streaming checkpoint pending splits (scan task), it
would probably also prefer to use JSON serialization (than Java serialization).
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