XML Type
openGauss supports the XML type. The following is an example:
postgres= CREATE TABLE xmltest ( id int, data xml );
postgres= INSERT INTO xmltest VALUES (1, 'one');
postgres= INSERT INTO xmltest VALUES (2, 'two');
postgres= SELECT * FROM xmltest ORDER BY 1;
id | data
----+--------------------
1 | one
2 | two
(2 rows)
postgres= SELECT xmlconcat('', NULL, '');
xmlconcat
(1 row)
postgres= SELECT xmlconcat('', NULL, '');
xmlconcat
(1 row)
NOTE:
- This function is disabled by default. To use this function, you need to use the build.sh script to compile the database again and add the** --with-libxml** parameter to the ./configure configuration parameter.
- Before compilation, you need to run the yum install -y libxml2-devel command. Otherwise, the “configure: error: library 'xml2' (version >= 2.6.23) is required for XML support” error will be reported.
- Before compilation, you need to add the dependency/operating system environment/libobs/comm/lib in the binary file of the third-party library to the system environment variable LD_LIBRARY_PATH. Otherwise, an error message is displayed, indicating that libiconv.so does not exist.
Feedback