CDC incremental dedupe question here ```2 connecti...
# ask-community-for-troubleshooting
CDC incremental dedupe question here
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2 connections:
- MySQL --> S3 (Incremental Append)
- S3 --> Snowflake (Incremental Dedupe)
Once the data is written to S3, it now contains the additional metadata
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  "_airbyte_ab_id": "b00c41e6-8a2f-4ed7-a10f-123",
  "_airbyte_emitted_at": 1644216617782,
  "_ab_cdc_log_pos": 123,
  "_ab_cdc_log_file": "mysql-bin-changelog.123",
  "_ab_cdc_updated_at": "2022-02-07T06:04:14Z"
when configuring the S3 --> Snowflake connection: the cursor field is source-defined but for the primary key, can I now use one of the metadata columns e.g.
or do i still need to use the primary keys that were defined in the original MySQL table?
It’s better to choose the PK defined in original MySQL table