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

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This commit is contained in:
Petri Lehtinen 2013-02-26 21:45:09 +02:00
commit 6401ad66a7
3 changed files with 18 additions and 5 deletions
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4
Doc/library/sqlite3.rst
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@ -830,6 +830,10 @@ 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:

2
Lib/sqlite3/dbapi2.py
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@ -67,7 +67,7 @@ def register_adapters_and_converters():
timepart_full = timepart.split(b".") timepart_full = timepart.split(b".")
hours, minutes, seconds = map(int, timepart_full[0].split(b":")) hours, minutes, seconds = map(int, timepart_full[0].split(b":"))
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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@ -313,11 +313,20 @@ 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():