Davis Zhang created HUDI-9543:
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Summary: Secondary index does not handle null char properly
Key: HUDI-9543
URL: https://issues.apache.org/jira/browse/HUDI-9543
Project: Apache Hudi
Issue Type: Bug
Reporter: Davis Zhang
If secondary key column contains null, the SI does not track those records.
Plan: Escape some char and use the unescaped version as the note for null str
Use "`" to represent null
for normal string, escape "`" to "`1"
Make sure reader and writer path works for this
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