原始表數據如下：

　　需求：現要求按分號“;”將rate_item列進行分割後插入到新的數據表中。

CREATE OR REPLACE FUNCTION fun_gp_test_xxx_20181026(v_month int)
RETURNS INT AS
$BODY$

declare
v_num int;
v_count int;

begin
    v_num := 0;
    v_count := 1;
    
    while v_count > 0 loop
        v_num := v_num + 1;
        select count(1) into
 
 v_count from temp_cwh_test_1106 where split_part(rate_item,‘;‘,v_num) <> ‘‘;
        if v_count > 0 then
            insert into temp_cwh_test_1106_02 select serv_id,usage_date,latn_id,split_part(rate_item,‘;‘,v_num) from temp_cwh_test_1106 where split_part(rate_item,‘;‘,v_num) <> ‘‘; ---- 需要提前建好temp_cwh_test_1106_02表
 

        end if;
    end loop;
return 0;
end;


$BODY$
  LANGUAGE plpgsql VOLATILE;

　　創建函數之後，調用函數。

---- 函數調用 ----
select fun_gp_test_xxx_20181026(‘201810‘)

---- 查看結果表 ----
select * from temp_cwh_test_1106_02;  -- 182

　　結果如下：

END 2018-11-07 00:10:02

GreenPlum學習筆記：create or replace function創建函數