Meta commands in Psycopg2 - \d not working

问题

I wish to list all the column names of a table using psycopg2 package of Python (2.7). But I am unable to execute the following query -

cur.execute("\d my_table");
psycopg2.ProgrammingError: syntax error at or near "\"

Is there an alternate as to how I can list the column names of a table using psycopg2 ? Please point out any duplicates. Thanks !

回答1:

Command line psql has some shortcuts like \d but it's not part of SQL. What you need is to query information_schema:

SELECT column_name FROM information_schema.columns WHERE table_name = 'my_table';

EDIT: It's really an important information that the command line psql -E will echo SQL queries used to implement \d and other backslash commands (whenever you use one of them in the psql prompt) as @piro has written in comment. This way you get what you want very easily.
Thanks @piro!

来源：https://stackoverflow.com/questions/31532489/meta-commands-in-psycopg2-d-not-working