diff --git "a/content/zh/post/z-qw/openGauss-\345\276\252\347\216\257\350\257\255\345\217\245.md" "b/content/zh/post/z-qw/openGauss-\345\276\252\347\216\257\350\257\255\345\217\245.md"
index cf4835a83e7dddd20d977e9d6b9d5e8ba4b965a4..14c675c5605e2d96662eb3f67acc4e606347b461 100644
--- "a/content/zh/post/z-qw/openGauss-\345\276\252\347\216\257\350\257\255\345\217\245.md"
+++ "b/content/zh/post/z-qw/openGauss-\345\276\252\347\216\257\350\257\255\345\217\245.md"
@@ -12,20 +12,171 @@ author = "z-qw"
summary = "openGauss社区开发入门"
-img = ""
+img = "/zh/post/z-qw/title-loop/title.jpg"
times = "17:30"
+++
## LOOP语句
-1.与label标签名连用，可使用continue或者iterate + label标签名跳出本次循环，重新开始下一次循环；可使用exit/leave + label标签名 退出循环
创建循环，使用iterate + label标签名跳出本次循环；leave + label标签名 退出循环
CREATE OR REPLACE PROCEDURE prc_loop(i in integer, count out integer)
AS
BEGIN
count:=0;
label1:
LOOP
IF count > i THEN
raise info 'count is %. ', count;
LEAVE label1;
ELSE
count:=count+1;
END IF;
IF count < 7 THEN
ITERATE label1;
ELSE
raise info 'greater than 7';
END IF;
END LOOP label1;
END;
/
调用存储过程
CALL prc_loop(10,5);
显示信息
INFO: greater than 7
INFO: greater than 7
INFO: greater than 7
INFO: greater than 7
INFO: greater than 7
INFO: count is 11.
count
11
(1 row)
+1.与label标签名连用，可使用continue或者iterate + label标签名跳出本次循环，重新开始下一次循环；可使用exit/leave + label标签名 退出循环
+```
+CREATE OR REPLACE PROCEDURE prc_loop(i in integer, count out integer)
+AS
+BEGIN
+count:=0;
+label1:
+LOOP
+ IF count > i THEN
+raise info 'count is %. ', count;
+LEAVE label1;
+ELSE
+count:=count+1;
+END IF;
+IF count < 7 THEN
+ITERATE label1;
+ELSE
+raise info 'greater than 7';
+END IF;
+END LOOP label1;
+END;
+/
+```
+```
+CALL prc_loop(10,5);
+```
+```
+INFO: greater than 7
+INFO: greater than 7
+INFO: greater than 7
+INFO: greater than 7
+INFO: greater than 7
+INFO: count is 11.
+count
+-----
+11
+(1 row)
+```
-2.可用于存储过程带有自治事务、自定义函数、游标、触发器等环境中
举例：创建自定义函数
CREATE FUNCTION func_loop(a int,b int,i int) return int
AS
BEGIN
LOOP
i=i-1;
IF i>4 then
CONTINUE;
END IF;
a=a+b;
IF i<2 then
EXIT;
END IF;
END LOOP;
RETURN a;
END;
/
--2.调用函数
CALL func_loop(1,2,7);
--显示信息
func_loop
9
(1 row)
+2.可用于存储过程带有自治事务、自定义函数、游标、触发器等环境中
举例：
+```
+CREATE FUNCTION func_loop(a int,b int,i int) return int
+AS
+ BEGIN
+ LOOP
+ i=i-1;
+ IF i>4 then
+ CONTINUE;
+ END IF;
+ a=a+b;
+ IF i<2 then
+ EXIT;
+ END IF;
+ END LOOP;
+ RETURN a;
+ END;
+/
+```
+```
+CALL func_loop(1,2,7);
+```
+```
+func_loop
+--------
+9
+(1 row)
+```
## WHILE_LOOP 语句
-在每次循环开始判断，若为真值，继续循环，反之，退出循环。
举例：
CREATE OR REPLACE PROCEDURE proc_while_loop(a int,b out int)
AS
DECLARE
i int :=1;
BEGIN
WHILE i raise info '循环%次. ', i;
i:=i+1;
END LOOP;
raise info 'i is %. ', i;
b=i;
END;
/
调用函数
CALL proc_while_loop(5,6);
显示信息
INFO: 循环1次.
INFO: 循环2次.
INFO: 循环3次.
INFO: 循环4次.
INFO: i is 5.
b
5
(1 row)
+在每次循环开始判断，若为真值，继续循环，反之，退出循环。
举例：
+```
+CREATE OR REPLACE PROCEDURE proc_while_loop(a int,b out int)
+AS
+DECLARE
+i int :=1;
+BEGIN
+WHILE i =min.
举例：从5到10进行循环
CREATE OR REPLACE PROCEDURE proc_for_loop(sum out int)
AS
BEGIN
sum:=0;
FOR a IN 5..15 LOOP
sum=a+sum;
raise info '循环%次,和为%.', a-4,sum;
END LOOP;
END;
/
调用函数
CALL proc_for_loop();
显示信息
INFO: 循环1次,和为5.
INFO: 循环2次,和为11.
INFO: 循环3次,和为18.
INFO: 循环4次,和为26.
INFO: 循环5次,和为35.
INFO: 循环6次,和为45.
INFO: 循环7次,和为56.
INFO: 循环8次,和为68.
INFO: 循环9次,和为81.
INFO: 循环10次,和为95.
INFO: 循环11次,和为110.
sum
110
(1 row)
+变量指定起始位置min，遍历到达指定终点位置max，其中max>=min.
举例：
+```
+CREATE OR REPLACE PROCEDURE proc_for_loop(sum out int)
+AS
+BEGIN
+sum:=0;
+FOR a IN 5..15 LOOP
+sum=a+sum;
+raise info '循环%次,和为%.', a-4,sum;
+END LOOP;
+END;
+/
+```
+```
+CALL proc_for_loop();
+```
+```
+INFO: 循环1次,和为5.
+INFO: 循环2次,和为11.
+INFO: 循环3次,和为18.
+INFO: 循环4次,和为26.
+INFO: 循环5次,和为35.
+INFO: 循环6次,和为45.
+INFO: 循环7次,和为56.
+INFO: 循环8次,和为68.
+INFO: 循环9次,和为81.
+INFO: 循环10次,和为95.
+INFO: 循环11次,和为110.
+sum
+---
+110
+(1 row)
+```
### 2.查询语句变量
-变量会自动定义，类型和查询结果的类型一致，并且只在此循环中有效。target的取值就是查询结果。
创建查询表
CREATE TABLE tb_select(id int,name text);
INSERT INTO tb_select VALUES(1,'lili'),(2,'kiko'),(3,'MING');
CREATE OR REPLACE PROCEDURE proc_for_loop_query(count out int)
AS
record text;
BEGIN
count=0;
FOR record IN SELECT name FROM tb_select LOOP
count=count+1;
raise info '名字是%.',record;
END LOOP;
END;
/
调用函数
CALL proc_for_loop_query(9);
显示信息
INFO: 名字是lili.
INFO: 名字是kiko.
INFO: 名字是MING.
count
3
(1 row)
-
+变量会自动定义，类型和查询结果的类型一致，并且只在此循环中有效。target的取值就是查询结果。
+```
+CREATE TABLE tb_select(id int,name text);
+INSERT INTO tb_select VALUES(1,'lili'),(2,'kiko'),(3,'MING');
+CREATE OR REPLACE PROCEDURE proc_for_loop_query(count out int)
+AS
+record text;
+BEGIN
+count=0;
+FOR record IN SELECT name FROM tb_select LOOP
+count=count+1;
+raise info '名字是%.',record;
+END LOOP;
+END;
+/
+```
+```
+CALL proc_for_loop_query(9);
+```
+```
+INFO: 名字是lili.
+INFO: 名字是kiko.
+INFO: 名字是MING.
+count
+-----
+3
+(1 row)
+```
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