DB=# SELECT n.nspname as "Schema",c.relname as "Name",pg_catalog.pg_get_userbyid(c.relowner) as "Owner" FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind ='r' AND n.nspname in('public',current_user) ORDER BY 2,1;...
To dump all functions in a schema you can query the system tables in pg_catalog; say if you wanted everything from public:SELECT pg_get_functiondef(f.oid) FROM pg_catalog.pg_proc f INNER JOIN pg_catalog.pg_namespace n ON (f.pronamespace = n.oid) WHERE n.nspname = 'public'; it...
select oid, conname from pg_constraint where contype = 'f' and conrelid = source_table::regclass loop execute format( 'alter table %s add constraint %s %s', new_table, replace(rec.conname, source_table, new_table), pg_get_constraintdef(rec.oid)); end loop; end $$; select create_...
PG_FUNCTION_INFO_V1(base36_in); Datumbase36_in(PG_FUNCTION_ARGS){longresult;char*str = PG_GETARG_CSTRING(0); result = strtol(str,NULL,36); PG_RETURN_INT32((int32)result); } PG_FUNCTION_INFO_V1(base36_out); Datumbase36_out(PG_FUNCTION_ARGS){ int32 arg = PG_GETARG_INT32(0)...
PostgreSQL是一种开源的关系型数据库管理系统,也被简称为Postgres。它具有强大的功能和可靠性,被广泛应用于各种规模的应用程序和企业级系统。 强制提交空闲事务是指在PostgreSQL中...
(a.attname) AS column_names, pg_get_indexdef(ix.indexrelid) AS definition FROM pg_class t, pg_class i, pg_index ix, pg_attribute a WHERE t.oid = ix.indrelid AND i.oid = ix.indexrelid AND a.attrelid = t.oid AND t.relkind = 'r' and t.relname = 'Products' GROUP BY i....
或者可以在PL/pgSQL代码块中使用该变量: 总结起来,将PostgreSQL函数的结果保存到变量中的步骤如下: 创建一个与函数结果类型匹配的变量。 使用SELECT INTO语句将函数结果赋值给变量。 在后续的SQL语句或PL/pgSQL代码块中使用该变量。 腾讯云相关产品和产品介绍链接地址: 腾讯云数据库 PostgreSQL:https://cloud.tencent...
current_user(PG_FUNCTION_ARGS) { PG_RETURN_DATUM(DirectFunctionCall1(namein, CStringGetDatum(GetUserNameFromId(GetUserId())); } 此函数是PG的内部函数,使用效果是: 1 2 3 4 5 postgres=# select CURRENT_USER; current_user --- postgres (1 row) 按照...
SELECTindexname,indexdefFROMpg_indexesWHEREtablename='' 例如,要查看表users的索引信息,可以输入以下命令: SELECTindexname,indexdefFROMpg_indexesWHEREtablename='users'; 执行该命令后,将会返回如下结果: | indexname | indexdef | |---|---| | users_pkey | CREATE UNIQUE INDEX users_pkey ON public.u...
PG服务进程(Postgres)——PG进程拥有的私有资源 Postmaster创建postgres子进程 Postmaster拥有BackendList后端列表,用于存放标识postgres子进程的Backend。 staticdlist_headBackendList=DLIST_STATIC_INIT(BackendList); /* BackendStartup -- start backend process returns: STATUS_ERROR if the fork failed, STATUS_OK ...