小编Leo*_*sky的帖子

我尝试为我的数据创建报告，但在大表上真的很慢。

表结构为：

CREATE TABLE posts
(
  id serial NOT NULL,
  project_id integer,
  moderation character varying(255),
  keyword_id integer,
  author_id integer,
  created_at timestamp without time zone,
  updated_at timestamp without time zone,
  server_id character varying(255),
  social_creation_time integer,
  social_id character varying(255),
  network character varying(255),
  mood character varying(255) DEFAULT NULL::character varying,
  url text,
  source_id integer,
  location character varying(255),
  subject_id integer,
  conversation_id integer,
  CONSTRAINT posts_pkey PRIMARY KEY (id)
);

CREATE INDEX index_posts_on_author_id ON posts (author_id);
CREATE INDEX index_posts_on_keyword_id ON posts (keyword_id);
CREATE INDEX index_posts_on_project_id_and_network_and_social_id 
    ON posts …