def quoted_column_names_writing_template(self, specify_column_names):
"""
@param specify_column_names if truthy, specify column names in COPY statement
A parameterized test. Test that COPY can write to a table with quoted
column names by:
- creating a table with quoted column names,
- inserting test data into that table,
- COPYing that table into a CSV file into the table, explicitly naming columns,
- writing that test data to a CSV file,
- asserting that the two CSV files contain the same rows.
If the specify_column_names parameter is truthy, the COPY statement
explicitly names the columns.
"""
self.prepare()
self.session.execute("""
CREATE TABLE testquoted (
"IdNumber" int PRIMARY KEY,
"select" text
)""")
data = [[1, 'no'], [2, 'Yes'], [3, 'True'], [4, 'false']]
insert_statement = self.session.prepare(
"""INSERT INTO testquoted ("IdNumber", "select") VALUES (?, ?)""")
execute_concurrent_with_args(self.session, insert_statement, data)
self.tempfile = NamedTemporaryFile(delete=False)
stmt = ("""COPY ks.testquoted ("IdNumber", "select") TO '{name}'"""
if specify_column_names else
"""COPY ks.testquoted TO '{name}'""").format(
name=self.tempfile.name)
self.node1.run_cqlsh(stmt)
reference_file = NamedTemporaryFile(delete=False)
write_rows_to_csv(reference_file.name, data)
assert_csvs_items_equal(self.tempfile.name, reference_file.name)
def test_explicit_column_order_writing(self):
"""
Test that COPY can write to a CSV file when the order of columns is
explicitly specified by:
- creating a table,
- COPYing to a CSV file with columns in a different order than they
appeared in the CREATE TABLE statement,
- writing a CSV file with the columns in that order, and
- asserting that the two CSV files contain the same values.
"""
self.prepare()
self.session.execute("""
CREATE TABLE testorder (
a int primary key,
b int,
c text
)""")
data = [[1, 20, 'ham'], [2, 40, 'eggs'], [3, 60, 'beans'],
[4, 80, 'toast']]
insert_statement = self.session.prepare(
"INSERT INTO testorder (a, b, c) VALUES (?, ?, ?)")
execute_concurrent_with_args(self.session, insert_statement, data)
self.tempfile = NamedTemporaryFile(delete=False)
self.node1.run_cqlsh("COPY ks.testorder (a, c, b) TO '{name}'".format(
name=self.tempfile.name))
reference_file = NamedTemporaryFile(delete=False)
with open(reference_file.name, 'wb') as csvfile:
writer = csv.writer(csvfile)
for a, b, c in data:
writer.writerow([a, c, b])
csvfile.close
assert_csvs_items_equal(self.tempfile.name, reference_file.name)
def quoted_column_names_writing_template(self, specify_column_names):
"""
@param specify_column_names if truthy, specify column names in COPY statement
A parameterized test. Test that COPY can write to a table with quoted
column names by:
- creating a table with quoted column names,
- inserting test data into that table,
- COPYing that table into a CSV file into the table, explicitly naming columns,
- writing that test data to a CSV file,
- asserting that the two CSV files contain the same rows.
If the specify_column_names parameter is truthy, the COPY statement
explicitly names the columns.
"""
self.prepare()
self.session.execute("""
CREATE TABLE testquoted (
"IdNumber" int PRIMARY KEY,
"select" text
)""")
data = [[1, 'no'], [2, 'Yes'],
[3, 'True'], [4, 'false']]
insert_statement = self.session.prepare("""INSERT INTO testquoted ("IdNumber", "select") VALUES (?, ?)""")
execute_concurrent_with_args(self.session, insert_statement, data)
self.tempfile = NamedTemporaryFile(delete=False)
stmt = ("""COPY ks.testquoted ("IdNumber", "select") TO '{name}'"""
if specify_column_names else
"""COPY ks.testquoted TO '{name}'""").format(name=self.tempfile.name)
self.node1.run_cqlsh(stmt)
reference_file = NamedTemporaryFile(delete=False)
write_rows_to_csv(reference_file.name, data)
assert_csvs_items_equal(self.tempfile.name, reference_file.name)
def test_explicit_column_order_writing(self):
"""
Test that COPY can write to a CSV file when the order of columns is
explicitly specified by:
- creating a table,
- COPYing to a CSV file with columns in a different order than they
appeared in the CREATE TABLE statement,
- writing a CSV file with the columns in that order, and
- asserting that the two CSV files contain the same values.
"""
self.prepare()
self.session.execute("""
CREATE TABLE testorder (
a int primary key,
b int,
c text
)""")
data = [[1, 20, 'ham'], [2, 40, 'eggs'],
[3, 60, 'beans'], [4, 80, 'toast']]
insert_statement = self.session.prepare("INSERT INTO testorder (a, b, c) VALUES (?, ?, ?)")
execute_concurrent_with_args(self.session, insert_statement, data)
self.tempfile = NamedTemporaryFile(delete=False)
self.node1.run_cqlsh(
"COPY ks.testorder (a, c, b) TO '{name}'".format(name=self.tempfile.name))
reference_file = NamedTemporaryFile(delete=False)
with open(reference_file.name, 'wb') as csvfile:
writer = csv.writer(csvfile)
for a, b, c in data:
writer.writerow([a, c, b])
csvfile.close
assert_csvs_items_equal(self.tempfile.name, reference_file.name)