postgresql数据库随机抽样支持
Open
- Dominant language
- Java
- Stars
- 17.4k
- Forks
- 5.7k
- PR merge metrics
- No merged PRs in 30d
Description
postgresql9.5版本开始支持tablesample函数随机抽样，对于字段来说单纯的最大最小值区间split还是太局限了，可以支持一下不。
Contributor guide
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Research direction
Start by locating DataX's PostgreSQL reader and the existing field-splitting logic based on maximum and minimum values. Check how reader options and version compatibility are handled, then review or add tests covering PostgreSQL 9.5+ TABLESAMPLE behavior. Done means random sampling is supported without breaking the existing split strategy.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, postgresql
- Domain
- databases
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100