在Amazon EC2 RDS上使用PostgreSQL:
=> SHOW rds.extensions;
rds.extensions
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
btree_gin,btree_gist,chkpass,citext,cube,dblink,dict_int,dict_xsyn,earthdistance,fuzzystrmatch,hstore,intagg,intarray,isn,ltree,pgcrypto,pgrowlocks,pg_trgm,plperl,plpgsql,pltcl,postgis,postgis_tiger_geocoder,postgis_topology,sslinfo,tablefunc,tsearch2,unaccent,uuid-ossp
(1 row)
正如您所看到的,uuid-ossp
扩展确实存在。 但是,当我调用生成uuid_v4
函数时,会失败:
CREATE TABLE my_table (
id uuid DEFAULT uuid_generate_v4() NOT NULL,
name character varying(32) NOT NULL,
);
这个有什么问题吗?