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Issue #14720: Enhance sqlite3 microsecond conversion, document its behavior

This commit is contained in:
Petri Lehtinen 2013-02-26 21:32:02 +02:00
parent ba48264bce
commit e41a4634c9
3 changed files with 19 additions and 6 deletions
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4
Doc/library/sqlite3.rst
View File

@ -832,6 +832,10 @@ The following example demonstrates this.
.. literalinclude:: ../includes/sqlite3/pysqlite_datetime.py .. literalinclude:: ../includes/sqlite3/pysqlite_datetime.py
If a timestamp stored in SQLite has a fractional part longer than 6
numbers, its value will be truncated to microsecond precision by the
timestamp converter.
.. _sqlite3-controlling-transactions: .. _sqlite3-controlling-transactions:

4
Lib/sqlite3/dbapi2.py
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@ -1,4 +1,4 @@
#-*- coding: ISO-8859-1 -*- # -*- coding: iso-8859-1 -*-
# pysqlite2/dbapi2.py: the DB-API 2.0 interface # pysqlite2/dbapi2.py: the DB-API 2.0 interface
# #
# Copyright (C) 2004-2005 Gerhard Häring <gh@ghaering.de> # Copyright (C) 2004-2005 Gerhard Häring <gh@ghaering.de>
@ -68,7 +68,7 @@ def register_adapters_and_converters():
timepart_full = timepart.split(".") timepart_full = timepart.split(".")
hours, minutes, seconds = map(int, timepart_full[0].split(":")) hours, minutes, seconds = map(int, timepart_full[0].split(":"))
if len(timepart_full) == 2: if len(timepart_full) == 2:
microseconds = int('{:0<6}'.format(timepart_full[1].decode())) microseconds = int('{:0<6.6}'.format(timepart_full[1].decode()))
else: else:
microseconds = 0 microseconds = 0

17
Lib/sqlite3/test/regression.py
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@ -296,11 +296,20 @@ class RegressionTests(unittest.TestCase):
con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_DECLTYPES) con = sqlite.connect(":memory:", detect_types=sqlite.PARSE_DECLTYPES)
cur = con.cursor() cur = con.cursor()
cur.execute("CREATE TABLE t (x TIMESTAMP)") cur.execute("CREATE TABLE t (x TIMESTAMP)")
cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.456')")
cur.execute("SELECT * FROM t")
date = cur.fetchall()[0][0]
self.assertEqual(date, datetime.datetime(2012, 4, 4, 15, 6, 0, 456000)) # Microseconds should be 456000
cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.456')")
# Microseconds should be truncated to 123456
cur.execute("INSERT INTO t (x) VALUES ('2012-04-04 15:06:00.123456789')")
cur.execute("SELECT * FROM t")
values = [x[0] for x in cur.fetchall()]
self.assertEqual(values, [
datetime.datetime(2012, 4, 4, 15, 6, 0, 456000),
datetime.datetime(2012, 4, 4, 15, 6, 0, 123456),
])
def suite(): def suite():