4性能损失 性能损失这个gap其实大多数人也能想到，UUID的字节更大，产生UUID的开销也往往更高，同时序列也对高并发生成的场景做了大量优化(cache)，👇🏻可以看到二者的一个产生效率 postgres=# create sequence test_seq;CREATE SEQUENCEpostgres=# explain analyze select nextval('test_seq') from generate_series...
【4】https://datatracker.ietf.org/doc/html/rfc4122 【5】https://blog.bhanunadar.com/pros-and-cons-of-using-uuid-as-primary-key-in-postgres/ 【6】https://www.ietf.org/archive/id/draft-peabody-dispatch-new-uuid-format-04.html#timestamp_granularity 【7】https://www.sqlservercentral.com/ar...
【4】https://datatracker.ietf.org/doc/html/rfc4122 【5】https://blog.bhanunadar.com/pros-and-cons-of-using-uuid-as-primary-key-in-postgres/ 【6】https://www.ietf.org/archive/id/draft-peabody-dispatch-new-uuid-format-04.html#timestamp_granularity 【7】https://www.sqlservercentral.com/ar...
【4】https://datatracker.ietf.org/doc/html/rfc4122 【5】https://blog.bhanunadar.com/pros-and-cons-of-using-uuid-as-primary-key-in-postgres/ 【6】https://www.ietf.org/archive/id/draft-peabody-dispatch-new-uuid-format-04.html#timestamp_granularity 【7】https://www.sqlservercentral.com/ar...
UUID also known as GUID is an alternative primary key type for SQL databases. It offers some non-obvious advantages compared to standard integer-based keys. Rails 6 release fresh out of beta introduces a new feature in ActiveRecord that makes working wit
I am trying to create a UUID as the primary key for the above class/table The only examples I have been able to find look like the above but when I run my fastapi server I get the following error: Exception has occurred: AttributeError (note: full exception trace is shown but execution...
Primary key UUID_v1 example 具体算法以及各个版本的差异此处表过不提。在PostgreSQL中,低版本可以用"uuid-ossp"或者pgcrypto插件,13以后原生就提供了 gen_random_uuid() 函数用于获取UUID (v4版本)。那么细分到PostgreSQL数据库中,从DBA以及可维护性角度来分析的话,UUID是否推崇?作为替代,序列/bigint之类是否可行?
ENUUID(Universally Unique Identifier)全局唯一标识符,是指在一台机器上生成的数字，它保证对在同一时空...
postgres=# create sequence test_seq; CREATE SEQUENCE postgres=# explain analyze select nextval('test_seq') from generate_series(1,10e6); QUERY PLAN --- Function Scan on generate_series (cost=0.00..12.50 rows=1000 width=8) (actual time=2631.336..9060.781 rows=10000000 loops=1) Planning Time...
Primary key UUID_v1 example 具体算法以及各个版本的差异此处表过不提。在PostgreSQL中,低版本可以用"uuid-ossp"或者pgcrypto插件,13以后原生就提供了 gen_random_uuid() 函数用于获取UUID (v4版本)。那么细分到PostgreSQL数据库中,从DBA以及可维护性角度来分析的话,UUID是否推崇?作为替代,序列/bigint之类是否可行?