DO $$ BEGIN IF NOT EXISTS (SELECT FROM pg_class WHERE relname = 'your_table_name' AND relkind = 'r') THEN RAISE NOTICE 'Table does not exist.'; ELSE RAISE NOTICE 'Table exists.'; END IF; END $$; 在这个例子中,将'your_
1、问题 新建的pgsql数据库,在执行select uuid_generate_v4()时报错。 functionuuid_generate_v4() doesnotexist 2、原因 函数未定义:PostgreSQL 没有加载 uuid-ossp 模块,该模块包含 uuid_generate_v4() 函数。 3、解决 可以通过以下命令安装并加载uuid-ossp模块。 CREATEEXTENSIONIFNOTEXISTS"uuid-ossp";...
CREATE COLLATION [ IF NOT EXISTS ] name FROM existing_collation 1. 2. 3. 4. 5. 6. 7. 8. 9. 其中几个关键参数: PROVIDER:指定用于与此排序规则相关的区域服务的提供程序。可能的值是: icu、libc。 默认 是libc。但若要设置大小写不敏感,目前只支持icu。 DETERMINISTIC:设置成not deterministic表示大...
' '||column_record.column_name||' '||column_record.column_type||' '||column_record.column_default_value||' '||column_record.column_not_null; END IF; END LOOP; v_table_ddl:=v_table_ddl||');'; RETURN v_table_ddl; END; $BODY$ LANGUAGE 'plpgsql' COST 100.0 SECURITY INVOKER; 1....
ENPG数据库和应用之间常见的部件有连接池、负载平衡组件、路由、防火墙等。我们常常不在意或者认为涉及的...
(';ELSEv_table_ddl:=v_table_ddl||',';ENDIF;IFcolumn_record.attnum<=column_record.max_attnumTHENv_table_ddl:=v_table_ddl||chr(10)||''||column_record.column_name||''||column_record.column_type||''||column_record.column_default_value||''||column_record.column_not_null;ENDIF;END...
Type Varchar: " + (int)StoredProcParam.DataTypes.Varchar); if(!StoredProcParam.DataTypes.Array.Equals(NpgsqlDbType.Array)) { Console.WriteLine("Array Type is not same"); } if (!StoredProcParam.DataTypes.Varchar.Equals(NpgsqlDbType.Varchar)) { Console.WriteLine("Varchar Type is not same"); ...
displayed when it's Master. These states are the transitional state of final data, and it may be not consistent with the state of actual data. For instance, During PRI, the state is "LATEST". But the node is stopped or down, this state "LATEST" is maintained if Master doesn't exist...
If the film does not exist, raise a notice that the film is not found. Second, use the if...then...elsif statement to assign a description to a film based on the length of the film. Summary Use the if..then statement to execute one or more statements when a condition is true. Us...
备份数据库时出现“could not execute query: ERROR: must be owner of database” 的错误,可能是备份的用户没有足够的权限。 恢复数据库时出现“could not connect to database postgres: FATAL: database “postgres” does not exist”的错误,可能是需要手动创建空的目标数据库。