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