使用python获取Oracle数据库的架构

Question

I want to list and describe the tables present in an Oracle database.

To do this by connecting to the database with a client such as SQL Plus, a working approach is:

1. List the tables:

   select tablespace_name, table_name from all_tables;

2. Get columns and data types for each table:

   describe [table_name];

However when using cx_Oracle through python, cur.execute('describe [table_name]') results in an 'invalid sql' error.

How can we use describe with cx_Oracle in python?

Answer 1

It seems you can't.

From cx_Oracle instead of describe use:

cur.execute('select column_name, data_type from all_tab_columns where table_name = [table_name]')

(From Richard Moore here http://cx-oracle-users.narkive.com/suaWH9nn/cx-oracle4-3-1-describe-table-query-is-not-working )

Answer 2

As noted by others there is no ability to describe directly. I created a set of libraries and tools that let you do this, however. You can see them here: https://github.com/anthony-tuininga/cx_OracleTools .