postgres表繼承分表

創建一個father表的子表

CREATE TABLE test_1 () INHERITS (father_table);

分表之後第一件事情當然就是把原有父表的數據分發到各個子表中

首先創建原有數據對應的子表

DO $$
 DECLARE
    father RECORD;
 BEGIN
 FOR father IN SELECT item_type FROM father_table GROUP BY item_type LOOP
  EXECUTE format('CREATE TABLE test_$%s () INHERITS (father_table);', father_table.item_type);
END LOOP;
END; $$

這時各個分表是空的，開始往各個分表分發數據

DO $$
 DECLARE
    father RECORD;
 BEGIN
 FOR father IN SELECT item_type FROM father_table GROUP BY item_type LOOP
  EXECUTE format('INSERT INTO test_$%s SELECT * FROM father_table WHERE father_table.item_type = %s);', father_table.item_type);
END LOOP;
END; $$

然後再清除調父表的數據就ok了

DELETE FROM ONLY father_table;