Merge from trunk

[plcapi.git] / trunk / psycopg2 / examples / tz.py

diff --git a/trunk/psycopg2/examples/tz.py b/trunk/psycopg2/examples/tz.py
new file mode 100644 (file)
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+++ b/trunk/psycopg2/examples/tz.py
@@ -0,0 +1,69 @@
+# tz.py - example of datetime objects with time zones
+# -*- encoding: utf8 -*-
+#
+# Copyright (C) 2004 Federico Di Gregorio  <fog@debian.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+
+## put in DSN your DSN string
+
+DSN = 'dbname=test'
+
+## don't modify anything below this line (except for experimenting)
+
+import sys
+import psycopg2
+import datetime
+
+from psycopg2.tz import ZERO, LOCAL, FixedOffsetTimezone
+
+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_tz (t timestamp with time zone)")
+except:
+    conn.rollback()
+    curs.execute("DROP TABLE test_tz")
+    curs.execute("CREATE TABLE test_tz (t timestamp with time zone)")
+conn.commit()
+
+d = datetime.datetime(1971, 10, 19, 22, 30, 0, tzinfo=LOCAL)
+curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
+print "Inserted timestamp with timezone:", d
+print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
+
+tz = FixedOffsetTimezone(-5*60, "EST")
+d = datetime.datetime(1971, 10, 19, 22, 30, 0, tzinfo=tz)
+curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
+print "Inserted timestamp with timezone:", d
+print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
+
+curs.execute("SELECT * FROM test_tz")
+d = curs.fetchone()[0]
+curs.execute("INSERT INTO test_tz VALUES (%s)", (d,))
+print "Inserted SELECTed timestamp:", d
+print "Time zone:", d.tzinfo.tzname(d), "offset:", d.tzinfo.utcoffset(d)
+
+curs.execute("SELECT * FROM test_tz")
+for d in curs:
+    u = d[0].utcoffset() or ZERO
+    print "UTC time:  ", d[0] - u 
+    print "Local time:", d[0]
+    print "Time zone:", d[0].tzinfo.tzname(d[0]), d[0].tzinfo.utcoffset(d[0])
+    
+
+curs.execute("DROP TABLE test_tz")
+conn.commit()