Question

尝试将数组附加到数组似乎不起作用。

DO
$do$
DECLARE
  COUNTER INTEGER = 0;
  CRNS bigint [];
  TMPS bigint [];
BEGIN
  WHILE COUNTER < 2 LOOP
    TMPS := ARRAY(select plain_crn from call_records where timestamp=1467981702966);
    array_append(CRNS,TMPS);
    RAISE NOTICE '%',CRNS;
    COUNTER := COUNTER + 1;
  END LOOP;  
END
$do$;

似乎收到以下错误

ERROR:  function array_append(bigint[], bigint[]) does not exist
LINE 1: SELECT array_append(CRNS,TMPS)
           ^

Answer 1

函数array_append()将一个元素追加到数组中。您应该使用运算符||连接两个数组。

DO
$do$
DECLARE
  COUNTER INTEGER = 0;
  CRNS bigint [];
BEGIN
  WHILE COUNTER < 2 LOOP
    CRNS := CRNS || ARRAY(select plain_crn from call_records where timestamp=1467981702966);
    RAISE NOTICE '%',CRNS;
    COUNTER := COUNTER + 1;
  END LOOP;  
END
$do$;

为什么数组追加不起作用+ Postgres

1 个答案: