我正在嘗試使用 PHP 在 Postgres 數據庫上執行查詢。我收到以下錯誤：pg_prepare(): Query failed: ERROR: relation "login" does not exist LINE 1: SELECT * FROM login 這是我的代碼片段：$connString = "host= port= dbname= user=password=";$conn = pg_connect($connString);if ($conn) {    $sql = 'SELECT * FROM login ';    if (pg_prepare($conn, "myQuery", $sql)) {        $result = pg_execute($conn, "myQuery", array());        if ($result) {            while ($row = pg_fetch_row($result)) {                echo $row[0];                echo $row[1];            }        } else {            echo 'executing error!';        }    } else {        echo 'preparing error!';    }} else {    echo "Connection error!";}if ($conn) {    pg_close($conn);}當我運行此腳本時，它還會打印“準備錯誤！”我想數據庫中發生了一些事情。我試圖創建一個新表。我還嘗試在多個地方的查詢中使用引號，但沒有任何效果。這是我用來創建數據庫的查詢：CREATE TABLE login(    user_id integer NOT NULL GENERATED BY DEFAULT AS IDENTITY ( INCREMENT 1 START 1 MINVALUE 1 MAXVALUE 2147483647 CACHE 1 ),    username character varying(50) COLLATE pg_catalog."default",    pwd character varying(50) COLLATE pg_catalog."default",    CONSTRAINT pk_user_id PRIMARY KEY (user_id))我該如何解決？