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# datetime.py - example of using date and time types
#
# Copyright (C) 2001-2010 Federico Di Gregorio <fog@debian.org>
#
# psycopg2 is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
# License for more details.
## put in DSN your DSN string
DSN = 'dbname=test'
## don't modify anything below tis line (except for experimenting)
import sys
import psycopg2
import mx.DateTime
import datetime
from psycopg2.extensions import adapt
if len(sys.argv) > 1:
DSN = sys.argv[1]
print "Opening connection using dns:", DSN
conn = psycopg2.connect(DSN)
curs = conn.cursor()
try:
curs.execute("""CREATE TABLE test_dt (
k int4, d date, t time, dt timestamp, z interval)""")
except:
conn.rollback()
curs.execute("DROP TABLE test_dt")
curs.execute("""CREATE TABLE test_dt (
k int4, d date, t time, dt timestamp, z interval)""")
conn.commit()
# build and insert some data using mx.DateTime
mx1 = (
1,
mx.DateTime.Date(2004, 10, 19),
mx.DateTime.Time(0, 11, 17.015),
mx.DateTime.Timestamp(2004, 10, 19, 0, 11, 17.5),
mx.DateTime.DateTimeDelta(13, 15, 17, 59.9))
from psycopg2.extensions import adapt
import psycopg2.extras
print adapt(mx1)
print "Inserting mx.DateTime values..."
curs.execute("INSERT INTO test_dt VALUES (%s, %s, %s, %s, %s)", mx1)
# build and insert some values using the datetime adapters
dt1 = (
2,
datetime.date(2004, 10, 19),
datetime.time(0, 11, 17, 15000),
datetime.datetime(2004, 10, 19, 0, 11, 17, 500000),
datetime.timedelta(13, 15*3600+17*60+59, 900000))
print "Inserting Python datetime values..."
curs.execute("INSERT INTO test_dt VALUES (%s, %s, %s, %s, %s)", dt1)
# now extract the row from database and print them
print "Extracting values inserted with mx.DateTime wrappers:"
curs.execute("SELECT d, t, dt, z FROM test_dt WHERE k = 1")
for n, x in zip(mx1[1:], curs.fetchone()):
try:
# this will work only is psycopg has been compiled with datetime
# as the default typecaster for date/time values
s = repr(n) + "\n -> " + str(adapt(n)) + \
"\n -> " + repr(x) + "\n -> " + x.isoformat()
except:
s = repr(n) + "\n -> " + str(adapt(n)) + \
"\n -> " + repr(x) + "\n -> " + str(x)
print s
print
print "Extracting values inserted with Python datetime wrappers:"
curs.execute("SELECT d, t, dt, z FROM test_dt WHERE k = 2")
for n, x in zip(dt1[1:], curs.fetchone()):
try:
# this will work only is psycopg has been compiled with datetime
# as the default typecaster for date/time values
s = repr(n) + "\n -> " + repr(x) + "\n -> " + x.isoformat()
except:
s = repr(n) + "\n -> " + repr(x) + "\n -> " + str(x)
print s
print
curs.execute("DROP TABLE test_dt")
conn.commit()
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