Re: Sanitize schema name

Thanks all for your answers, you understand well my need.

About PQescapeIdentifier:
1. An idea of release date for the next version of psycopg2 ?
2. Are you sure it's enough to protect against SQL injections, because you
can read in the documentation: *Tip:* As with string literals, to prevent
SQL injection attacks, SQL identifiers must be escaped when they are
received from an untrustworthy source.

About format() it doesn't work for schema, example:
SELECT format('SELECT * FROM %I WHERE id=1', 'lg.devices')
=> SELECT * FROM "lg.devices" WHERE id=1
SELECT * FROM "lg.devices" WHERE id=1
=> ERROR: relation "lg.devices" does not exist
LIGNE 1 : SELECT * FROM "lg.devices" WHERE id=1
^

********** Error **********

ERROR: relation "lg.devices" does not exist

An idea should be also to verify if "lg" schema exists, but it means I need
to do two SQL queries each type, or keep a cache of schema list.

--
Ludovic Gasc (GMLudo)
http://www.gmludo.eu/

2015-05-07 15:33 GMT+02:00 Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>:

> On 05/07/2015 04:35 AM, Dorian Hoxha wrote:
>
>> He wants to dynamically pass the table name:
>>
>> cursor.execute("SELECT * FROM %s", (table,)) # won't work
>>
>>
> How about using format()?:
>
> http://www.postgresql.org/docs/9.4/static/functions-string.html#FUNCTIONS-STRING-FORMAT
>
> Available 9.1+
>
> cur.execute("select format('select * from %I', 'student_info')")
>
> sql_str = cur.fetchone()[0]
>
> sql_str
> 'select * from student_info'
>
>
>
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>