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我有一个以字符 '0','1','2',...,'9','a','b','c','d','e' 开头的某些字符串的黑名单，'F'，'？'。

然后我创建下表：

CREATE TABLE blacklist (concat TEXT UNIQUE NOT NULL) PARTITION BY RANGE (concat);

现在我进行 RANGE 分区：

CREATE TABLE IF NOT EXISTS blacklist_list_0 PARTITION OF blacklist FOR VALUES FROM ('0') TO ('0ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_0 ADD CONSTRAINT blacklist_list_0 CHECK (concat >= '0' AND concat <= '0ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_1 PARTITION OF blacklist FOR VALUES FROM ('1') TO ('1ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_1 ADD CONSTRAINT blacklist_list_1 CHECK (concat >= '1' AND concat <= '1ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_2 PARTITION OF blacklist FOR VALUES FROM ('2') TO ('2ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_2 ADD CONSTRAINT blacklist_list_2 CHECK (concat >= '2' AND concat <= '2ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_3 PARTITION OF blacklist FOR VALUES FROM ('3') TO ('3ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_3 ADD CONSTRAINT blacklist_list_3 CHECK (concat >= '3' AND concat <= '3ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_4 PARTITION OF blacklist FOR VALUES FROM ('4') TO ('4ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_4 ADD CONSTRAINT blacklist_list_4 CHECK (concat >= '4' AND concat <= '4ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_5 PARTITION OF blacklist FOR VALUES FROM ('5') TO ('5ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_5 ADD CONSTRAINT blacklist_list_5 CHECK (concat >= '5' AND concat <= '5ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_6 PARTITION OF blacklist FOR VALUES FROM ('6') TO ('6ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_6 ADD CONSTRAINT blacklist_list_6 CHECK (concat >= '6' AND concat <= '6ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_7 PARTITION OF blacklist FOR VALUES FROM ('7') TO ('7ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_7 ADD CONSTRAINT blacklist_list_7 CHECK (concat >= '7' AND concat <= '7ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_8 PARTITION OF blacklist FOR VALUES FROM ('8') TO ('8ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_8 ADD CONSTRAINT blacklist_list_8 CHECK (concat >= '8' AND concat <= '8ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_9 PARTITION OF blacklist FOR VALUES FROM ('9') TO ('9ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_9 ADD CONSTRAINT blacklist_list_9 CHECK (concat >= '9' AND concat <= '9ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_a PARTITION OF blacklist FOR VALUES FROM ('a') TO ('affffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_a ADD CONSTRAINT blacklist_list_a CHECK (concat >= 'a' AND concat <= 'affffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_b PARTITION OF blacklist FOR VALUES FROM ('b') TO ('bffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_b ADD CONSTRAINT blacklist_list_b CHECK (concat >= 'b' AND concat <= 'bffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_c PARTITION OF blacklist FOR VALUES FROM ('c') TO ('cffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_c ADD CONSTRAINT blacklist_list_c CHECK (concat >= 'c' AND concat <= 'cffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_d PARTITION OF blacklist FOR VALUES FROM ('d') TO ('dffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_d ADD CONSTRAINT blacklist_list_d CHECK (concat >= 'd' AND concat <= 'dffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_e PARTITION OF blacklist FOR VALUES FROM ('e') TO ('effffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_e ADD CONSTRAINT blacklist_list_e CHECK (concat >= 'e' AND concat <= 'effffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_f PARTITION OF blacklist FOR VALUES FROM ('f') TO ('fffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
ALTER TABLE blacklist_list_f ADD CONSTRAINT blacklist_list_f CHECK (concat >= 'f' AND concat <= 'fffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );
CREATE TABLE IF NOT EXISTS blacklist_list_rest PARTITION OF blacklist FOR VALUES FROM ('?') TO ('?ffffffffffffffffffffffffffffffffffffffffffffffffffffffff');
ALTER TABLE blacklist_list_rest ADD CONSTRAINT blacklist_list_rest CHECK (concat >= '?' AND concat <= '?ffffffffffffffffffffffffffffffffffffffffffffffffffffffff' );

我在带有 postgres 13.1 的 Ubuntu 20.04 上得到以下错误消息：

postgres=# CREATE TABLE IF NOT EXISTS blacklist_list_rest PARTITION OF blacklist FOR VALUES FROM ('?') TO ('?ffffffffffffffffffffffffffffffffffffffffffffffffffffffff');
ERROR:  partition "blacklist_list_rest" would overlap partition "blacklist_list_0"

但是当我在我的开发者站（gentoo linux，postgres 13.1）上运行它时我没有问题。

有人知道如何解决这个问题吗？我不认为这些字符重叠，我不认为我错过了诸如正则表达式之类的东西（'？'应该在这种情况下被检测为一个字符）。

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1 回答 1

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Postgres uses the collations from the operating system, so comparing and sorting strings might differ on different operating systems (or even on the same system when updates are applied). You can force a comparison with "pure" ASCII without using collations using the "C" collation:

CREATE TABLE blacklist 
(
  concat TEXT UNIQUE NOT NULL collate "C"
)
PARTITION BY RANGE (concat);
于 2020-12-17T18:16:02.467 回答