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from io import BytesIO
import pytest
@pytest.fixture
def db_table(request, con):
cursor = con.cursor()
cursor.execute(
"CREATE TEMPORARY TABLE t1 (f1 int primary key, "
"f2 int not null, f3 varchar(50) null) on commit drop"
)
return con
def test_copy_to_with_table(db_table):
cursor = db_table.cursor()
cursor.execute("INSERT INTO t1 (f1, f2, f3) VALUES (%s, %s, %s)", (1, 1, 1))
cursor.execute("INSERT INTO t1 (f1, f2, f3) VALUES (%s, %s, %s)", (2, 2, 2))
cursor.execute("INSERT INTO t1 (f1, f2, f3) VALUES (%s, %s, %s)", (3, 3, 3))
stream = BytesIO()
cursor.execute("copy t1 to stdout", stream=stream)
assert stream.getvalue() == b"1\t1\t1\n2\t2\t2\n3\t3\t3\n"
assert cursor.rowcount == 3
def test_copy_to_with_query(db_table):
cursor = db_table.cursor()
stream = BytesIO()
cursor.execute(
"COPY (SELECT 1 as One, 2 as Two) TO STDOUT WITH DELIMITER "
"'X' CSV HEADER QUOTE AS 'Y' FORCE QUOTE Two",
stream=stream,
)
assert stream.getvalue() == b"oneXtwo\n1XY2Y\n"
assert cursor.rowcount == 1
def test_copy_from_with_table(db_table):
cursor = db_table.cursor()
stream = BytesIO(b"1\t1\t1\n2\t2\t2\n3\t3\t3\n")
cursor.execute("copy t1 from STDIN", stream=stream)
assert cursor.rowcount == 3
cursor.execute("SELECT * FROM t1 ORDER BY f1")
retval = cursor.fetchall()
assert retval == ([1, 1, "1"], [2, 2, "2"], [3, 3, "3"])
def test_copy_from_with_query(db_table):
cursor = db_table.cursor()
stream = BytesIO(b"f1Xf2\n1XY1Y\n")
cursor.execute(
"COPY t1 (f1, f2) FROM STDIN WITH DELIMITER 'X' CSV HEADER "
"QUOTE AS 'Y' FORCE NOT NULL f1",
stream=stream,
)
assert cursor.rowcount == 1
cursor.execute("SELECT * FROM t1 ORDER BY f1")
retval = cursor.fetchall()
assert retval == ([1, 1, None],)
def test_copy_from_with_error(db_table):
cursor = db_table.cursor()
stream = BytesIO(b"f1Xf2\n\n1XY1Y\n")
with pytest.raises(BaseException) as e:
cursor.execute(
"COPY t1 (f1, f2) FROM STDIN WITH DELIMITER 'X' CSV HEADER "
"QUOTE AS 'Y' FORCE NOT NULL f1",
stream=stream,
)
arg = {
"S": ("ERROR",),
"C": ("22P02",),
"M": (
'invalid input syntax for type integer: ""',
'invalid input syntax for integer: ""',
),
"W": ('COPY t1, line 2, column f1: ""',),
"F": ("numutils.c",),
"R": ("pg_atoi", "pg_strtoint32", "pg_strtoint32_safe"),
}
earg = e.value.args[0]
for k, v in arg.items():
assert earg[k] in v
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