Back to index

psycopg2  2.4.5
simple.py
Go to the documentation of this file.
00001 # simple.py - very simple example of plain DBAPI-2.0 usage
00002 #
00003 # currently used as test-me-stress-me script for psycopg 2.0
00004 #
00005 # Copyright (C) 2001-2010 Federico Di Gregorio  <fog@debian.org>
00006 #
00007 # psycopg2 is free software: you can redistribute it and/or modify it
00008 # under the terms of the GNU Lesser General Public License as published
00009 # by the Free Software Foundation, either version 3 of the License, or
00010 # (at your option) any later version.
00011 #
00012 # psycopg2 is distributed in the hope that it will be useful, but WITHOUT
00013 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00014 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
00015 # License for more details.
00016 
00017 ## put in DSN your DSN string
00018 
00019 DSN = 'dbname=test'
00020 
00021 ## don't modify anything below this line (except for experimenting)
00022 
00023 class SimpleQuoter(object):
00024     def sqlquote(x=None):
00025         return "'bar'"
00026 
00027 import sys
00028 import psycopg2
00029 
00030 if len(sys.argv) > 1:
00031     DSN = sys.argv[1]
00032 
00033 print "Opening connection using dns:", DSN
00034 conn = psycopg2.connect(DSN)
00035 print "Encoding for this connection is", conn.encoding
00036 
00037 curs = conn.cursor()
00038 curs.execute("SELECT 1 AS foo")
00039 print curs.fetchone()
00040 curs.execute("SELECT 1 AS foo")
00041 print curs.fetchmany()
00042 curs.execute("SELECT 1 AS foo")
00043 print curs.fetchall()
00044 
00045 conn.rollback()
00046 
00047 sys.exit(0)
00048 
00049 curs.execute("SELECT 1 AS foo", async=1)
00050 
00051 curs.execute("SELECT %(foo)s AS foo", {'foo':'bar'})
00052 curs.execute("SELECT %(foo)s AS foo", {'foo':None})
00053 curs.execute("SELECT %(foo)f AS foo", {'foo':42})
00054 curs.execute("SELECT %(foo)s AS foo", {'foo':SimpleQuoter()})