错误：分布式表的唯一索引必须包含 hash 分布列。 何时从 postgresql 迁移到 postgresql-xl

Question

I dump sql from postgresql by pg_dump and get below table define:

CREATE TABLE administrator (
    mtime bigint,
    email text,
    group_id bigint,
    user_account text NOT NULL
);
ALTER TABLE ONLY administrator ADD CONSTRAINT administrator_pkey PRIMARY KEY (user_account);

And I setup postgresql-xl then import the sql file it return:

ERROR: Unique index of distributed table must contain the hash distribution column.

The Postgres-XL manual says:

If DISTRIBUTE BY is not specified, columns with UNIQUE constraint will be chosen as the distribution key. If no such column is specified, distribution column is the first eligible column in the definition. If no such column is found, then the table will be distributed by ROUNDROBIN.

If this is ture why my sql file import still return Error?

Answer 1

Drop Table administrator ;

CREATE TABLE administrator (
    mtime bigint,
    email text,
    group_id bigint,
    user_account text NOT NULL
) DISTRIBUTE BY HASH(user_account);

ALTER TABLE administrator ADD CONSTRAINT administrator_pkey PRIMARY KEY (user_account);

will fix the problem.