PostgreSQL - 如何插入復合類型的數組

Question

CREATE TYPE myenum AS ENUM ('title', 'link', 'text');
CREATE TYPE struct AS (
            type myenum,
            content varchar(300)
        );
CREATE TABLE "mytable" (
            id serial PRIMARY KEY,
            array struct[]
        );
INSERT INTO "mytable" VALUES (
            DEFAULT,
            '{"(\"title\",\"my title\")","(\"link\",\"www.google.com\")"}'
        );
INSERT INTO "mytable" VALUES (
            DEFAULT,
            ARRAY['(\"title\",\"my title\")', '(\"link\",\"www.google.com\")']
        );
INSERT INTO "mytable" VALUES (
            DEFAULT,
            ARRAY[('title','my title'), ('link','www.google.com')]
        );

我想插入一些數據，我嘗試了很多 forms 但它們都無法插入成功，並且有一些錯誤消息

error: malformed array literal: "{"("title","my title")","("link","www.google.com")"}"
error: malformed array literal: "{("title","my title"), ("link","www.google.com")}"
error: column "placeholder_array" is of type placeholder_struct[] but expression is of type text[]
error: column "placeholder_array" is of type placeholder_struct[] but expression is of type record[]

需要幫助pppp，這對我來說太難了，太麻煩了，非常感謝！！！！

Answer 1

1）。 不要調用您的列array ，這是一個關鍵字。

2）。 使用::struct將您的元組轉換為該數據類型。

CREATE TYPE myenum AS ENUM ('title', 'link', 'text');

CREATE TYPE struct AS (
            type myenum,
            content varchar(300)
        );

CREATE TABLE mytable (
            id serial PRIMARY KEY,
            val_array struct[]
        );

INSERT INTO mytable VALUES (
            DEFAULT,
            ARRAY[('title','my title')::struct, ('link','www.google.com')::struct]
        );

db<>小提琴演示