Loading /Inserting Multiple XML files into Oracle table at once - oracle12c

Question

I have a table xml_table_date. Below is the structure and sample data in the table.
But I want to insert multiple xml files (here it is 9) into the table in one go. These files resides in a DB directory
My code to insert xml file into the table:
CREATE TABLE xml_table_data (
File_name varchar2(100),
Insert_date timestamp
xml_data XMLTYPE
);
INSERT INTO xml_tab VALUES ( 'DataTransfer_HH_TWWholesale_001_004_12142020113003.xml',
XMLTYPE (BFILENAME ('TESTING', 'DataTransfer_HH_TWWholesale_001_004_12142020113003.xml'),NLS_CHARSET_ID ('AL32UTF8')));
Please help me on this.. Thanks for reading my query.

Answer 1

You can use an external table with preproxessing to read the filenames from the directory.
ALTER SESSION SET CONTAINER=pdb1;
CREATE DIRECTORY data_dir AS '/u02/data';
CREATE DIRECTORY script_dir AS '/u02/scripts';
CREATE DIRECTORY log_dir AS '/u02/logs';
GRANT READ, WRITE ON DIRECTORY data_dir TO demo1;
GRANT READ, EXECUTE ON DIRECTORY script_dir TO demo1;
GRANT READ, WRITE ON DIRECTORY log_dir TO demo1;
Create a list_files.sh file in the scripts-directory. Make sure oracle is the owner and the privileges are 755 on the file.
The preprocessing script file don't inherit the $PATH enviroment variable. So you have to prepend /usr/bin before all commands.
/usr/bin/ls -1 /u02/data/test*.xml | /usr/bin/xargs -n1 /usr/bin/basename
You also need a source file for the external table, but this can be an empty dummy file.
CREATE TABLE data_files
( file_name VARCHAR2(255))
ORGANIZATION EXTERNAL
(
TYPE ORACLE_LOADER
DEFAULT DIRECTORY data_dir
ACCESS PARAMETERS
( RECORDS DELIMITED BY NEWLINE CHARACTERSET AL32UTF8
PREPROCESSOR script_dir: 'list_files.sh'
BADFILE log_dir:'list_files_%a_%p.bad'
LOGFILE log_dir:'list_files_%a_%p.log'
FIELDS TERMINATED BY WHITESPACE
)
LOCATION ('dummy.txt')
)
REJECT LIMIT UNLIMITED;
Now you can insert the xml data into your table.
INSERT INTO xml_table_data
( file_name,
insert_date,
xml_data
)
SELECT file_name,
SYSTIMESTAMP,
XMLTYPE (BFILENAME ('DATA_DIR', file_name), NLS_CHARSET_ID ('AL32UTF8'))
FROM data_files;
You still need to adapt the example to your environment, please.