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我有一个有 60 列的表，并且想对其进行垂直分区，或者更像将其划分为按列划分的更多小表。如何使用 postgres 9.2 在数据库中进行垂直分区？做了很多谷歌，但找不到任何有用的东西。

我要垂直分区的表是：

CREATE TABLE insurance.vt_owner
(
  regn_no character varying(10) NOT NULL,
  regn_dt timestamp without time zone,
  purchase_dt timestamp without time zone,
  owner_sr numeric(5,0),
  owner_name character varying(150),
  pan_no character varying(10),
  f_name character varying(150),
  c_add1 character varying(50),
  c_add2 character varying(50),
  c_city character varying(50),
  c_district character varying(30),
  c_pincode character varying(6),
  p_add1 character varying(50),
  p_add2 character varying(50),
  p_city character varying(50),
  p_district character varying(30),
  p_pincode character varying(6),
  owner_cd numeric(5,0),
  owner_cd_desc character varying(50),
  regn_type character varying(1),
  regn_type_desc character varying(50),
  vh_class numeric(5,0),
  vh_class_desc character varying(50),
  chasi_no character varying(30),
  eng_no character varying(30),
  maker numeric(5,0),
  maker_desc character varying(50),
  maker_model character varying(50),
  body_type character varying(3),
  body_type_desc character varying(50),
  no_cyl numeric(2,0),
  hp character varying(10),
  seat_cap numeric(3,0),
  stand_cap numeric(3,0),
  sleeper_cap numeric(2,0),
  unld_wt numeric(9,0),
  ld_wt numeric(9,0),
  fuel numeric(3,0),
  fuel_desc character varying(50),
  color character varying(50),
  manu_mon numeric(2,0),
  manu_yr numeric(4,0),
  fit_dt timestamp without time zone,
  norms numeric(2,0),
  norms_desc character varying(50),
  wheelbase character varying(10),
  cubic_cap character varying(10),
  floor_area numeric(7,3),
  ac_fiitted character(1),
  audio_fiitted character(1),
  video_fiitted character(1),
  vch_purchase_as character(1),
  vch_catg character(3),
  dealer_cd numeric(5,0),
  dealer_cd_desc character varying(50),
  sale_amt numeric(9,0),
  laser_code character varying(10),
  garage_add character varying(50),
  state_cd character varying(2) NOT NULL,
  rto_cd character varying(3) NOT NULL,
  CONSTRAINT vt_owner_pkey PRIMARY KEY (state_cd, rto_cd, regn_no)
)
WITH (
  OIDS=FALSE
);
ALTER TABLE insurance.vt_owner
  OWNER TO postgres;

-- Index: insurance."index_VT_OWNER"

-- DROP INDEX insurance."index_VT_OWNER";

CREATE INDEX "index_VT_OWNER"
  ON insurance.vt_owner
  USING btree
  (regn_no COLLATE pg_catalog."default", chasi_no COLLATE pg_catalog."default", state_cd COLLATE pg_catalog."default", rto_cd COLLATE pg_catalog."default");

提前致谢

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2 回答 2

1

除非您指定为什么要垂直分区，否则我认为您不会得到一个像样的答案。分片？表现？非规范化？在您的大部分查询中只需要某些列？

有点相关，如果您的数据集（未压缩）在 1TB 以下，您可以免费试用 Vertica 的社区版，但要遵守其许可限制（阅读细则）。Vertica 是一个列式存储数据库，对于许多用例来说速度非常快。我过去曾将它用于分析，并且效果非常好（当然有一些陷阱）。

于 2013-07-18T15:42:21.630 回答
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寻找 INSTEADOF 触发器。用 2 个不同的名称拆分表，并通过一个视图将它们统一起来。在视图上应用instead of 触发器，并且所有插入和删除都必须适用于两个表。也要小心处理更新

于 2015-05-27T18:43:13.500 回答