Unverified50% confidenceFactExact time
PostgreSQL 默认将标识符折叠为小写,MySQL 对标识符大小写不敏感,与 Snowflake 的大写折叠行为存在差异
1
Sources
50%
Confidence
Long-term
Relevance
7/17/2026
First Seen
Sources
Related Claims
UnverifiedSnowflake 和 Oracle 将未加引号标识符折叠为大写,PostgreSQL 折叠为小写,MySQL 行为在不同操作系统和配置下不一致84% similarUnverifiedSnowflake 遵循 SQL-92 标准,未加双引号的标识符在存储和比较时一律折叠为大写(case-folding),双引号括起来的标识符区分大小写并保留原始形式76% similarUnverifiedPostgreSQL 16优化了WAL写入路径的锁粒度63% similarUnverifiedPostgreSQL流复制支持同步和异步两种模式,可用于读写分离63% similarUnverifiedPostgreSQL可以同时替代MySQL和MongoDB的功能62% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/541329API
curl https://kongchang.com/api/v1/knowledge/claims/541329MCP
get_claim(id=541329)