hcq/openGauss-connector-python-psycopg2
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

first commit based on psycopg2 2.9 version

Browse Source
This commit is contained in:
lishifu_db
2021-07-05 21:34:17 +08:00
parent d126b6ec53
commit 3553ed0e30
178 changed files with 51253 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

404
tests/test_copy.py Executable file
View File

@ -0,0 +1,404 @@
#!/usr/bin/env python
# test_copy.py - unit test for COPY support
#
# Copyright (C) 2010-2019 Daniele Varrazzo <daniele.varrazzo@gmail.com>
# Copyright (C) 2020-2021 The Psycopg Team
#
# 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.
#
# In addition, as a special exception, the copyright holders give
# permission to link this program with the OpenSSL library (or with
# modified versions of OpenSSL that use the same license as OpenSSL),
# and distribute linked combinations including the two.
#
# You must obey the GNU Lesser General Public License in all respects for
# all of the code used other than OpenSSL.
#
# 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.
import io
import sys
import string
import unittest
from .testutils import ConnectingTestCase, skip_before_postgres, slow, StringIO
from .testutils import skip_if_crdb
from itertools import cycle
from subprocess import Popen, PIPE
import psycopg2
import psycopg2.extensions
from .testutils import skip_copy_if_green, TextIOBase
from .testconfig import dsn
class MinimalRead(TextIOBase):
"""A file wrapper exposing the minimal interface to copy from."""
def __init__(self, f):
self.f = f
def read(self, size):
return self.f.read(size)
def readline(self):
return self.f.readline()
class MinimalWrite(TextIOBase):
"""A file wrapper exposing the minimal interface to copy to."""
def __init__(self, f):
self.f = f
def write(self, data):
return self.f.write(data)
@skip_copy_if_green
class CopyTests(ConnectingTestCase):
def setUp(self):
ConnectingTestCase.setUp(self)
self._create_temp_table()
def _create_temp_table(self):
skip_if_crdb("copy", self.conn)
curs = self.conn.cursor()
curs.execute('''
CREATE TEMPORARY TABLE tcopy (
id serial PRIMARY KEY,
data text
)''')
@slow
def test_copy_from(self):
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=1024, srec=10 * 1024, copykw={})
finally:
curs.close()
@slow
def test_copy_from_insane_size(self):
# Trying to trigger a "would block" error
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=10 * 1024, srec=10 * 1024,
copykw={'size': 20 * 1024 * 1024})
finally:
curs.close()
def test_copy_from_cols(self):
curs = self.conn.cursor()
f = StringIO()
for i in range(10):
f.write(f"{i}\n")
f.seek(0)
curs.copy_from(MinimalRead(f), "tcopy", columns=['id'])
curs.execute("select * from tcopy order by id")
self.assertEqual([(i, None) for i in range(10)], curs.fetchall())
def test_copy_from_cols_err(self):
curs = self.conn.cursor()
f = StringIO()
for i in range(10):
f.write(f"{i}\n")
f.seek(0)
def cols():
raise ZeroDivisionError()
yield 'id'
self.assertRaises(ZeroDivisionError,
curs.copy_from, MinimalRead(f), "tcopy", columns=cols())
@slow
def test_copy_to(self):
curs = self.conn.cursor()
try:
self._copy_from(curs, nrecs=1024, srec=10 * 1024, copykw={})
self._copy_to(curs, srec=10 * 1024)
finally:
curs.close()
def test_copy_text(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
abin = bytes(list(range(32, 127))
+ list(range(160, 256))).decode('latin1')
about = abin.replace('\\', '\\\\')
curs = self.conn.cursor()
curs.execute('insert into tcopy values (%s, %s)',
(42, abin))
f = io.StringIO()
curs.copy_to(f, 'tcopy', columns=('data',))
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
def test_copy_bytes(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
abin = bytes(list(range(32, 127))
+ list(range(160, 255))).decode('latin1')
about = abin.replace('\\', '\\\\').encode('latin1')
curs = self.conn.cursor()
curs.execute('insert into tcopy values (%s, %s)',
(42, abin))
f = io.BytesIO()
curs.copy_to(f, 'tcopy', columns=('data',))
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
def test_copy_expert_textiobase(self):
self.conn.set_client_encoding('latin1')
self._create_temp_table() # the above call closed the xn
abin = bytes(list(range(32, 127))
+ list(range(160, 256))).decode('latin1')
about = abin.replace('\\', '\\\\')
f = io.StringIO()
f.write(about)
f.seek(0)
curs = self.conn.cursor()
psycopg2.extensions.register_type(
psycopg2.extensions.UNICODE, curs)
curs.copy_expert('COPY tcopy (data) FROM STDIN', f)
curs.execute("select data from tcopy;")
self.assertEqual(curs.fetchone()[0], abin)
f = io.StringIO()
curs.copy_expert('COPY tcopy (data) TO STDOUT', f)
f.seek(0)
self.assertEqual(f.readline().rstrip(), about)
# same tests with setting size
f = io.StringIO()
f.write(about)
f.seek(0)
exp_size = 123
# hack here to leave file as is, only check size when reading
real_read = f.read
def read(_size, f=f, exp_size=exp_size):
self.assertEqual(_size, exp_size)
return real_read(_size)
f.read = read
curs.copy_expert('COPY tcopy (data) FROM STDIN', f, size=exp_size)
curs.execute("select data from tcopy;")
self.assertEqual(curs.fetchone()[0], abin)
def _copy_from(self, curs, nrecs, srec, copykw):
f = StringIO()
for i, c in zip(range(nrecs), cycle(string.ascii_letters)):
l = c * srec
f.write(f"{i}\t{l}\n")
f.seek(0)
curs.copy_from(MinimalRead(f), "tcopy", **copykw)
curs.execute("select count(*) from tcopy")
self.assertEqual(nrecs, curs.fetchone()[0])
curs.execute("select data from tcopy where id < %s order by id",
(len(string.ascii_letters),))
for i, (l,) in enumerate(curs):
self.assertEqual(l, string.ascii_letters[i] * srec)
def _copy_to(self, curs, srec):
f = StringIO()
curs.copy_to(MinimalWrite(f), "tcopy")
f.seek(0)
ntests = 0
for line in f:
n, s = line.split()
if int(n) < len(string.ascii_letters):
self.assertEqual(s, string.ascii_letters[int(n)] * srec)
ntests += 1
self.assertEqual(ntests, len(string.ascii_letters))
def test_copy_expert_file_refcount(self):
class Whatever:
pass
f = Whatever()
curs = self.conn.cursor()
self.assertRaises(TypeError,
curs.copy_expert, 'COPY tcopy (data) FROM STDIN', f)
def test_copy_no_column_limit(self):
cols = [f"c{i:050}" for i in range(200)]
curs = self.conn.cursor()
curs.execute('CREATE TEMPORARY TABLE manycols (%s)' % ',\n'.join(
["%s int" % c for c in cols]))
curs.execute("INSERT INTO manycols DEFAULT VALUES")
f = StringIO()
curs.copy_to(f, "manycols", columns=cols)
f.seek(0)
self.assertEqual(f.read().split(), ['\\N'] * len(cols))
f.seek(0)
curs.copy_from(f, "manycols", columns=cols)
curs.execute("select count(*) from manycols;")
self.assertEqual(curs.fetchone()[0], 2)
def test_copy_funny_names(self):
cols = ["select", "insert", "group"]
curs = self.conn.cursor()
curs.execute('CREATE TEMPORARY TABLE "select" (%s)' % ',\n'.join(
['"%s" int' % c for c in cols]))
curs.execute('INSERT INTO "select" DEFAULT VALUES')
f = StringIO()
curs.copy_to(f, "select", columns=cols)
f.seek(0)
self.assertEqual(f.read().split(), ['\\N'] * len(cols))
f.seek(0)
curs.copy_from(f, "select", columns=cols)
curs.execute('select count(*) from "select";')
self.assertEqual(curs.fetchone()[0], 2)
@skip_before_postgres(8, 2) # they don't send the count
def test_copy_rowcount(self):
curs = self.conn.cursor()
curs.copy_from(StringIO('aaa\nbbb\nccc\n'), 'tcopy', columns=['data'])
self.assertEqual(curs.rowcount, 3)
curs.copy_expert(
"copy tcopy (data) from stdin",
StringIO('ddd\neee\n'))
self.assertEqual(curs.rowcount, 2)
curs.copy_to(StringIO(), "tcopy")
self.assertEqual(curs.rowcount, 5)
curs.execute("insert into tcopy (data) values ('fff')")
curs.copy_expert("copy tcopy to stdout", StringIO())
self.assertEqual(curs.rowcount, 6)
def test_copy_rowcount_error(self):
curs = self.conn.cursor()
curs.execute("insert into tcopy (data) values ('fff')")
self.assertEqual(curs.rowcount, 1)
self.assertRaises(psycopg2.DataError,
curs.copy_from, StringIO('aaa\nbbb\nccc\n'), 'tcopy')
self.assertEqual(curs.rowcount, -1)
def test_copy_query(self):
curs = self.conn.cursor()
curs.copy_from(StringIO('aaa\nbbb\nccc\n'), 'tcopy', columns=['data'])
self.assert_(b"copy " in curs.query.lower())
self.assert_(b" from stdin" in curs.query.lower())
curs.copy_expert(
"copy tcopy (data) from stdin",
StringIO('ddd\neee\n'))
self.assert_(b"copy " in curs.query.lower())
self.assert_(b" from stdin" in curs.query.lower())
curs.copy_to(StringIO(), "tcopy")
self.assert_(b"copy " in curs.query.lower())
self.assert_(b" to stdout" in curs.query.lower())
curs.execute("insert into tcopy (data) values ('fff')")
curs.copy_expert("copy tcopy to stdout", StringIO())
self.assert_(b"copy " in curs.query.lower())
self.assert_(b" to stdout" in curs.query.lower())
@slow
def test_copy_from_segfault(self):
# issue #219
script = f"""import psycopg2
conn = psycopg2.connect({dsn!r})
curs = conn.cursor()
curs.execute("create table copy_segf (id int)")
try:
curs.execute("copy copy_segf from stdin")
except psycopg2.ProgrammingError:
pass
conn.close()
"""
proc = Popen([sys.executable, '-c', script])
proc.communicate()
self.assertEqual(0, proc.returncode)
@slow
def test_copy_to_segfault(self):
# issue #219
script = f"""import psycopg2
conn = psycopg2.connect({dsn!r})
curs = conn.cursor()
curs.execute("create table copy_segf (id int)")
try:
curs.execute("copy copy_segf to stdout")
except psycopg2.ProgrammingError:
pass
conn.close()
"""
proc = Popen([sys.executable, '-c', script], stdout=PIPE)
proc.communicate()
self.assertEqual(0, proc.returncode)
def test_copy_from_propagate_error(self):
class BrokenRead(TextIOBase):
def read(self, size):
return 1 / 0
def readline(self):
return 1 / 0
curs = self.conn.cursor()
# It seems we cannot do this, but now at least we propagate the error
# self.assertRaises(ZeroDivisionError,
# curs.copy_from, BrokenRead(), "tcopy")
try:
curs.copy_from(BrokenRead(), "tcopy")
except Exception as e:
self.assert_('ZeroDivisionError' in str(e))
def test_copy_to_propagate_error(self):
class BrokenWrite(TextIOBase):
def write(self, data):
return 1 / 0
curs = self.conn.cursor()
curs.execute("insert into tcopy values (10, 'hi')")
self.assertRaises(ZeroDivisionError,
curs.copy_to, BrokenWrite(), "tcopy")
def test_suite():
return unittest.TestLoader().loadTestsFromName(__name__)
if __name__ == "__main__":
unittest.main()