From 56ff60a631c9bac1fb16fee651721acb9698fbbc Mon Sep 17 00:00:00 2001
From: liang_-123 <x00518129@china.huawei.com>
Date: Sun, 6 Sep 2020 10:25:34 +0800
Subject: [PATCH] add the xml datatype information

---
 .../XML\347\261\273\345\236\213.md"           | 33 +++++++++++++++++++
 ...60\346\215\256\347\261\273\345\236\213.md" |  2 +-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 "content/zh/docs/Developerguide/XML\347\261\273\345\236\213.md"

diff --git "a/content/zh/docs/Developerguide/XML\347\261\273\345\236\213.md" "b/content/zh/docs/Developerguide/XML\347\261\273\345\236\213.md"
new file mode 100644
index 000000000..874c043df
--- /dev/null
+++ "b/content/zh/docs/Developerguide/XML\347\261\273\345\236\213.md"
@@ -0,0 +1,33 @@
+# XML类型
+openGauss支持XML类型，使用示例如下：
+
+CREATE TABLE xmltest (
+    id int,
+    data xml
+);
+INSERT INTO xmltest VALUES (1, '<value>one</value>');
+INSERT INTO xmltest VALUES (2, '<value>two</value>');
+SELECT * FROM xmltest ORDER BY 1;
+ id |        data
+----+--------------------
+  1 | <value>one</value>
+  2 | <value>two</value>
+(2 rows)
+
+SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
+  xmlconcat
+--------------
+ <foo/><bar/>
+(1 row)
+
+SELECT xmlconcat('<?xml version="1.1"?><foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
+             xmlconcat
+-----------------------------------
+ <?xml version="1.1"?><foo/><bar/>
+(1 row)
+
+该功能默认未开启，如需使用，需要重新使用build.sh脚本编译数据库，修改./configure配置参数，在其中加入 --with-libxml 参数。
+
+在执行编译之前，需要先执行yum install -y libxml2-devel，否则会有"configure: error: library 'xml2' (version >= 2.6.23) is required for XML support"的报错。
+
+在执行编译之前，需要三方库二进制文件中dependeny/操作系统环境/libobs/comm/lib加入到系统环境变量LD_LIBRARY_PATH中，否则会报错"libiconv.so不存在"。
\ No newline at end of file
diff --git "a/content/zh/docs/Developerguide/\346\225\260\346\215\256\347\261\273\345\236\213.md" "b/content/zh/docs/Developerguide/\346\225\260\346\215\256\347\261\273\345\236\213.md"
index 3021cc183..4c460ef8e 100644
--- "a/content/zh/docs/Developerguide/\346\225\260\346\215\256\347\261\273\345\236\213.md"
+++ "b/content/zh/docs/Developerguide/\346\225\260\346\215\256\347\261\273\345\236\213.md"
@@ -32,4 +32,4 @@ openGauss支持某些数据类型间的隐式转换，具体转化关系请参
 
 -   **[列存表支持的数据类型](列存表支持的数据类型.md)**  
 
-
+-   **[XML类型](XML类型.md)** 
-- 
Gitee