2

我有功能

CREATE OR REPLACE FUNCTION "public"."GetSoilCod" ( 
  "cod1" integer = 0, 
  "cod2" integer = 0, 
  "cod3" integer = 0, 
  "cod4" integer = 0, 
  "cod5" integer = 0, 
  "cod6" integer = 0, 
  "cod7" integer = 0 
) 
RETURNS varchar AS 
$body$ 
declare result varchar; 
BEGIN 
  result = cast($1 as varchar(2)) || '.' || 
                cast($2 as varchar(2)) || '.' || 
                cast($3 as varchar(2)) || '.' || 
                cast($4 as varchar(2)) || '.' || 
                cast($5 as varchar(2)) || '.' || 
                cast($6 as varchar(2)) || '.' || 
                cast($7 as varchar(2)); 
  return trim('.0' from result); 
END; 
$body$ 
LANGUAGE 'plpgsql' 
VOLATILE 
CALLED ON NULL INPUT 
SECURITY INVOKER 
COST 100;

当我执行这个函数并且一个或多个代码被划分为 10 时，这个函数的结果是错误的。

例子：

SELECT * FROM "public"."GetSoilCod"(10, 0, 0, 0, 0, 0, 0); 
return: 1 
expected: 10 


SELECT * FROM "public"."GetSoilCod"(10, 20, 0, 0, 0, 0, 0); 
return: 10.2 
expected: 10.20

为什么修剪最后一个 0（零）？我只想修剪“.0”（点零）

如果我执行此查询：

SELECT * FROM "public"."GetSoilCod"(10, 20, 0, 0, 0, 0, 1); 
all its OK 
return & expected is: 10.20.0.0.0.0.1

或者：

SELECT * FROM "public"."GetSoilCod"(10, 20, 0, 0, 0, 1, 0);

一切正常。返回和预期是：10.20.0.0.0.1

我的错误在哪里？

4

1 回答 1

3

Trim 不会将参数视为要删除的单个字符串，它会将其视为字符的无序列表，无论它们从开头、结尾或两者出现的顺序如何，都必须删除所有这些字符。

该调用trim('.0' from result);与trim('0.' from result);并且都导致从字符串末尾删除所有0和。.

SELECT trim('0.' from '100.00')
'1'

尝试regexp_replace改用：

SELECT regexp_replace('100.0.2.0.0.0', '(\\.0)+$', '')
100.0.2
于 2010-06-27T19:39:33.013 回答