cassandra2.0.7 CQL 3.1.1订购,目前仅支持PRIMARY KEY
CREATE TABLE playlists (
id uuid,
song_order int,
song_id uuid,
title text,
album text,
artist text,
PRIMARY KEY (id, song_order));
INSERT INTO playlists (id, song_order, song_id, title, artist, album)
VALUES (62c36092-82a1-3a00-93d1-46196ee77204, 1,
a3e64f8f-bd44-4f28-b8d9-6938726e34d4, 'La Grange', 'ZZ Top', 'Tres Hombres');
INSERT INTO playlists (id, song_order, song_id, title, artist, album)
VALUES (62c36092-82a1-3a00-93d1-46196ee77204, 2,
8a172618-b121-4136-bb10-f665cfc469eb, 'Moving in Stereo', 'Fu Manchu', 'We Must Obey');
INSERT INTO playlists (id, song_order, song_id, title, artist, album)
VALUES (62c36092-82a1-3a00-93d1-46196ee77204, 3,
2b09185b-fb5a-4734-9b56-49077de9edbf, 'Outside Woman Blues', 'Back Door Slam', 'Roll Away');
SELECT * FROM playlists WHERE id = 62c36092-82a1-3a00-93d1-46196ee77204
ORDER BY song_order DESC LIMIT 2;
error: Order by is currently only supported on the clustered columns
of the PRIMARY KEY, got song_order
此演示从群集列:http://www.datastax.com/documentation/cql/3.1/cql/cql_reference/select_r.html
谁可以告诉我为什么吗? 谢谢!
你确定你创建的表是否正确?我只是尝试了最新的2.x的分支和所有工作得很好。仔细检查你的主键,如果你放错了一个右括号,那么你可能会有一个复合分区键((id,song_order))而不是((id),song_order) –