postgresql - 如何在plpgsql中从数组创建一个字符串

Question

我的函数得到了结果

EXECUTE format('SELECT ARRAY (SELECT tvmid from "%s".tvmtable order by tvmid)', operatorName) INTO tvms;

给出格式为 {1,2,3} 的 mi tvm 数组。我需要它有一个字符串除以 ，所以我正在尝试

SELECT ARRAY_TO_STRING(tvms, ",") INTO res;

但是当我执行我的功能时，我得到了错误

ERROR:  column "," does not exist

如果它有帮助，这就是我的全部功能

create or replace function getTVMList(operatorName varchar)
returns varchar as $$
declare
tvms varchar[];
res varchar;
begin
EXECUTE format('SELECT ARRAY (SELECT tvmid from "%s".tvmtable order by tvmid)', operatorName) INTO tvms;
SELECT ARRAY_TO_STRING(tvms, ",") INTO res;
return res;
end;
$$
language plpgsql;

Answer 1

双引号引用列名。

您必须将逗号放入单引号而不是双引号：','

 SELECT ARRAY_TO_STRING(tvms, ',') INTO res;