congqixia 0d356b0545
enhance: only buffer delete if it match insert has smaller timestamp (#30122)
See also: #30121 #27675

This PR changes the delete buffering logic:
- Write buffer shall buffer insert first
- Then the delete messages shall be evaluated
  - Whether PK matches previous Bloom filter, which ts is always smaller
  - Whether PK matches insert data which has smaller timestamp
- Then the segment bloom filter is updates by the newly buffered pk rows

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Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
2024-01-19 17:28:53 +08:00
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