How do I insert big JSON data into an Oracle database(insert 15000 rows with 1 query)? - cx-oracle

Question

I have an API that gives me 15000 rows of data in json every 10 seconds. I use this tutorial and when I insert 5 rows or more inserting is OK, but when I insert 15000 row that get error PLS-00172: string literal too long.
My Code:
create table jt_test (
CUST_NUM int, SORT_ORDER int, CATEGORY varchar2(100)
);
DECLARE
myJSON CLOB := '[
{"CUST_NUM": 12345, "SORT_ORDER": 1, "CATEGORY": "ICE CREAM"},
{"CUST_NUM": 12345, "SORT_ORDER": 2, "CATEGORY": "ICE CREAM"},
{"CUST_NUM": 12345, "SORT_ORDER": 3, "CATEGORY": "ICE CREAM"}
]';
BEGIN
insert into jt_test
select * from json_table ( myjson, '$[*]'
columns (
CUST_NUM, SORT_ORDER, CATEGORY
)
);
END;
Notes: I before use MSSql this link and work perfect even for 20000 rows in one query.
I use Oracle19C and connect and insert to db with cx_Oracle module python
Edit:
I test this tutorial but not work.

Answer 1

Instead of creating a large literal string in PL/SQL (which isn't allowed) you can create that string in Python instead and simply pass it through. Something like this should do the trick:
long_json_string = '''[
{"CUST_NUM": 12345, "SORT_ORDER": 1, "CATEGORY": "ICE CREAM"},
{"CUST_NUM": 12345, "SORT_ORDER": 2, "CATEGORY": "ICE CREAM"},
{"CUST_NUM": 12345, "SORT_ORDER": 3, "CATEGORY": "ICE CREAM"}
]'''
sql = '''
declare
myJSON CLOB := :long_json_string;
begin
insert into jt_test
select * from json_table ( myjson, '$[*]'
columns (
CUST_NUM, SORT_ORDER, CATEGORY
)
);
END;'''
cursor.execute(sql, long_json_string=long_json_string)