Jingsong Lee created FLINK-28244:
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Summary: Introduce changelog file for DataFile
Key: FLINK-28244
URL: https://issues.apache.org/jira/browse/FLINK-28244
Project: Flink
Issue Type: New Feature
Components: Table Store
Reporter: Jingsong Lee
Fix For: table-store-0.2.0
When using TableStore to support stream consumption, there are two requirements.
* Downstream gets all changelogs
* The order of stream consumption is the order of input
For append only table, it is easy to meet both.
But for the primary key table, Its files are all sorted and de-duplicated by
pk, making it impossible to meet the above expectations.
We can output another ChangelogFile when the DataFile flush, and the stream
reads it directly.
We can modify DataFileMeta:
{code:java}
class DataFileMeta {
String fileName;
.....
// store the suffix for extra files, extra files including changelog_file,
primary_key_index_file, secondary_index_file, and etc...
List<String> extraFiles;
}
{code}
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