小编nic*_*314的帖子

我有一个大型分区表，用于存储帐户之间的货币交易。

CREATE TABLE "transactions" (
  "from" BYTEA        NOT NULL  -- sender account
  ,"to" BYTEA         NOT NULL  -- receiver account
  ,"type" INTEGER     NOT NULL  -- type of transfer
  ,"ts" TIMESTAMP     NOT NULL  -- timestamp of transfer
) PARTITION BY RANGE ("ts");

“transactions”在“ts”、“from”和“to”上有索引（“ts”用于排序）。

CREATE INDEX "transactions_ts_idx"   ON "transactions" USING BTREE ("ts");
CREATE INDEX "transactions_from_idx" ON "transactions" USING BTREE ("from", "ts");
CREATE INDEX "transactions_to_idx"   ON "transactions" USING BTREE ("to",   "ts");

我想查询涉及给定帐户或没有帐户的所有交易，例如：

-- given an account <account>
SELECT * FROM "transactions"
WHERE "from" = …

我有一个范围分区表，我希望能够快速交换同一范围内的分区（即重新创建表并为其交换现有分区表）。但是，即使分区具有所有必需的索引，附加分区也需要很长时间。

-- create a partitioned table
create table "partitioned" (
  "k1" INTEGER NOT NULL,
  "k2" INTEGER NOT NULL,
  PRIMARY KEY("k1", "k2")
) PARTITION BY RANGE "k1";

-- create the table to be added as a partition
create table "segment_1_000_000_to_2_000_000" (
  "k1" INTEGER NOT NULL,
  "k2" INTEGER NOT NULL,
  PRIMARY KEY("k1", "k2")
);

-- insert 300,000,000 rows into table "segment_1_000_000_to_2_000_000" with "k1" values between values 1,000,000 and 2,000,000
-- ...

-- takes 5 minutes:
alter table "partitioned" attach partition "segment_1_000_000_to_2_000_000 for …