Python Snowflake Connector - 不能使用 set 语句？

Question

I get an error trying to use the set statement to create session variables while using python snowflake connector.

Is this even possible? Or would we have to create our own string interpolation?

Answer 1

You can use set statements with the Snowflake Connector if you use the executemany Python command and the EXECUTE IMMEDIATE Snowflake command.

An example on setting two variables then adding them together would look like:

    queries = [
        ['SET a = 2'],
        ['SET b = 3'],
        ['SELECT %a + %b']
    ]
    
    sql = 'EXECUTE IMMEDIATE %s'
    
    cursor.executemany(sql, queries)
    print(cursor.fetchall())

    #Returns [(5,)]

In this example '%s' is replaced by each of the three strings in 'queries', then those three queries are queued and submitted in one transaction.

If you would like to know more about using 'set' in Python-sent SQL queries, EXECUTE IMMEDIATE, and the Python command executemany , follow these links:

http://dot-pi.com/use-set-in-sql-commands-sent-from-python/

http://dot-pi.com/use-pythons-executemany-command-to-run-multiple-sql-queries-at-once/

Note: these are web pages I have written