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|
from sqlalchemy import exc as exceptions, select, MetaData, Integer, or_, \
bindparam
from sqlalchemy.engine import default
from sqlalchemy.sql import table, column
from sqlalchemy.sql.elements import _truncated_label
from sqlalchemy.testing import AssertsCompiledSQL, assert_raises, engines,\
fixtures, eq_
from sqlalchemy.testing.schema import Table, Column
IDENT_LENGTH = 29
class MaxIdentTest(fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = 'DefaultDialect'
table1 = table('some_large_named_table',
column('this_is_the_primarykey_column'),
column('this_is_the_data_column')
)
table2 = table('table_with_exactly_29_characs',
column('this_is_the_primarykey_column'),
column('this_is_the_data_column')
)
def _length_fixture(self, length=IDENT_LENGTH, positional=False):
dialect = default.DefaultDialect()
dialect.max_identifier_length = length
if positional:
dialect.paramstyle = 'format'
dialect.positional = True
return dialect
def _engine_fixture(self, length=IDENT_LENGTH):
eng = engines.testing_engine()
eng.dialect.max_identifier_length = length
return eng
def test_table_alias_1(self):
self.assert_compile(
self.table2.alias().select(),
'SELECT '
'table_with_exactly_29_c_1.'
'this_is_the_primarykey_column, '
'table_with_exactly_29_c_1.this_is_the_data_column '
'FROM '
'table_with_exactly_29_characs '
'AS table_with_exactly_29_c_1',
dialect=self._length_fixture()
)
def test_table_alias_2(self):
table1 = self.table1
table2 = self.table2
ta = table2.alias()
on = table1.c.this_is_the_data_column == ta.c.this_is_the_data_column
self.assert_compile(
select([table1, ta]).select_from(table1.join(ta, on)).
where(ta.c.this_is_the_data_column == 'data3'),
'SELECT '
'some_large_named_table.this_is_the_primarykey_column, '
'some_large_named_table.this_is_the_data_column, '
'table_with_exactly_29_c_1.this_is_the_primarykey_column, '
'table_with_exactly_29_c_1.this_is_the_data_column '
'FROM '
'some_large_named_table '
'JOIN '
'table_with_exactly_29_characs '
'AS '
'table_with_exactly_29_c_1 '
'ON '
'some_large_named_table.this_is_the_data_column = '
'table_with_exactly_29_c_1.this_is_the_data_column '
'WHERE '
'table_with_exactly_29_c_1.this_is_the_data_column = '
':this_is_the_data_column_1',
dialect=self._length_fixture()
)
def test_too_long_name_disallowed(self):
m = MetaData()
t = Table('this_name_is_too_long_for_what_were_doing_in_this_test',
m, Column('foo', Integer))
eng = self._engine_fixture()
methods = (t.create, t.drop, m.create_all, m.drop_all)
for meth in methods:
assert_raises(exceptions.IdentifierError, meth, eng)
def _assert_labeled_table1_select(self, s):
table1 = self.table1
compiled = s.compile(dialect=self._length_fixture())
assert set(compiled._create_result_map()['some_large_named_table__2'][1]).\
issuperset(
[
'some_large_named_table_this_is_the_data_column',
'some_large_named_table__2',
table1.c.this_is_the_data_column
]
)
assert set(compiled._create_result_map()['some_large_named_table__1'][1]).\
issuperset(
[
'some_large_named_table_this_is_the_primarykey_column',
'some_large_named_table__1',
table1.c.this_is_the_primarykey_column
]
)
def test_result_map_use_labels(self):
table1 = self.table1
s = table1.select().apply_labels().\
order_by(table1.c.this_is_the_primarykey_column)
self._assert_labeled_table1_select(s)
def test_result_map_limit(self):
table1 = self.table1
# some dialects such as oracle (and possibly ms-sql in a future
# version) generate a subquery for limits/offsets. ensure that the
# generated result map corresponds to the selected table, not the
# select query
s = table1.select(use_labels=True,
order_by=[table1.c.this_is_the_primarykey_column]).\
limit(2)
self._assert_labeled_table1_select(s)
def test_result_map_subquery(self):
table1 = self.table1
s = table1.select(
table1.c.this_is_the_primarykey_column == 4).\
alias('foo')
s2 = select([s])
compiled = s2.compile(dialect=self._length_fixture())
assert \
set(compiled._create_result_map()['this_is_the_data_column'][1]).\
issuperset(['this_is_the_data_column',
s.c.this_is_the_data_column])
assert \
set(compiled._create_result_map()['this_is_the_primarykey__1'][1]).\
issuperset(['this_is_the_primarykey_column',
'this_is_the_primarykey__1',
s.c.this_is_the_primarykey_column])
def test_result_map_anon_alias(self):
table1 = self.table1
dialect = self._length_fixture()
q = table1.select(table1.c.this_is_the_primarykey_column == 4).alias()
s = select([q]).apply_labels()
self.assert_compile(
s,
"SELECT "
"anon_1.this_is_the_primarykey__2 AS anon_1_this_is_the_prim_1, "
"anon_1.this_is_the_data_column AS anon_1_this_is_the_data_3 "
"FROM ("
"SELECT "
"some_large_named_table."
"this_is_the_primarykey_column AS this_is_the_primarykey__2, "
"some_large_named_table."
"this_is_the_data_column AS this_is_the_data_column "
"FROM "
"some_large_named_table "
"WHERE "
"some_large_named_table.this_is_the_primarykey_column "
"= :this_is_the_primarykey__1"
") "
"AS anon_1", dialect=dialect)
compiled = s.compile(dialect=dialect)
assert set(compiled._create_result_map()['anon_1_this_is_the_data_3'][1]).\
issuperset([
'anon_1_this_is_the_data_3',
q.corresponding_column(
table1.c.this_is_the_data_column)
])
assert set(compiled._create_result_map()['anon_1_this_is_the_prim_1'][1]).\
issuperset([
'anon_1_this_is_the_prim_1',
q.corresponding_column(
table1.c.this_is_the_primarykey_column)
])
def test_column_bind_labels_1(self):
table1 = self.table1
s = table1.select(table1.c.this_is_the_primarykey_column == 4)
self.assert_compile(
s,
"SELECT some_large_named_table.this_is_the_primarykey_column, "
"some_large_named_table.this_is_the_data_column "
"FROM some_large_named_table WHERE "
"some_large_named_table.this_is_the_primarykey_column = "
":this_is_the_primarykey__1",
checkparams={'this_is_the_primarykey__1': 4},
dialect=self._length_fixture()
)
self.assert_compile(
s,
"SELECT some_large_named_table.this_is_the_primarykey_column, "
"some_large_named_table.this_is_the_data_column "
"FROM some_large_named_table WHERE "
"some_large_named_table.this_is_the_primarykey_column = "
"%s",
checkpositional=(4, ),
checkparams={'this_is_the_primarykey__1': 4},
dialect=self._length_fixture(positional=True)
)
def test_column_bind_labels_2(self):
table1 = self.table1
s = table1.select(or_(
table1.c.this_is_the_primarykey_column == 4,
table1.c.this_is_the_primarykey_column == 2
))
self.assert_compile(
s,
"SELECT some_large_named_table.this_is_the_primarykey_column, "
"some_large_named_table.this_is_the_data_column "
"FROM some_large_named_table WHERE "
"some_large_named_table.this_is_the_primarykey_column = "
":this_is_the_primarykey__1 OR "
"some_large_named_table.this_is_the_primarykey_column = "
":this_is_the_primarykey__2",
checkparams={
'this_is_the_primarykey__1': 4,
'this_is_the_primarykey__2': 2
},
dialect=self._length_fixture()
)
self.assert_compile(
s,
"SELECT some_large_named_table.this_is_the_primarykey_column, "
"some_large_named_table.this_is_the_data_column "
"FROM some_large_named_table WHERE "
"some_large_named_table.this_is_the_primarykey_column = "
"%s OR "
"some_large_named_table.this_is_the_primarykey_column = "
"%s",
checkparams={
'this_is_the_primarykey__1': 4,
'this_is_the_primarykey__2': 2
},
checkpositional=(4, 2),
dialect=self._length_fixture(positional=True)
)
def test_bind_param_non_truncated(self):
table1 = self.table1
stmt = table1.insert().values(
this_is_the_data_column=
bindparam("this_is_the_long_bindparam_name")
)
compiled = stmt.compile(dialect=self._length_fixture(length=10))
eq_(
compiled.construct_params(
params={"this_is_the_long_bindparam_name": 5}),
{'this_is_the_long_bindparam_name': 5}
)
def test_bind_param_truncated_named(self):
table1 = self.table1
bp = bindparam(_truncated_label("this_is_the_long_bindparam_name"))
stmt = table1.insert().values(
this_is_the_data_column=bp
)
compiled = stmt.compile(dialect=self._length_fixture(length=10))
eq_(
compiled.construct_params(params={
"this_is_the_long_bindparam_name": 5}),
{"this_1": 5}
)
def test_bind_param_truncated_positional(self):
table1 = self.table1
bp = bindparam(_truncated_label("this_is_the_long_bindparam_name"))
stmt = table1.insert().values(
this_is_the_data_column=bp
)
compiled = stmt.compile(
dialect=self._length_fixture(length=10, positional=True))
eq_(
compiled.construct_params(params={
"this_is_the_long_bindparam_name": 5}),
{"this_1": 5}
)
class LabelLengthTest(fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = 'DefaultDialect'
table1 = table('some_large_named_table',
column('this_is_the_primarykey_column'),
column('this_is_the_data_column')
)
table2 = table('table_with_exactly_29_characs',
column('this_is_the_primarykey_column'),
column('this_is_the_data_column')
)
def test_adjustable_1(self):
table1 = self.table1
q = table1.select(
table1.c.this_is_the_primarykey_column == 4).alias('foo')
x = select([q])
compile_dialect = default.DefaultDialect(label_length=10)
self.assert_compile(
x, 'SELECT '
'foo.this_1, foo.this_2 '
'FROM ('
'SELECT '
'some_large_named_table.this_is_the_primarykey_column '
'AS this_1, '
'some_large_named_table.this_is_the_data_column '
'AS this_2 '
'FROM '
'some_large_named_table '
'WHERE '
'some_large_named_table.this_is_the_primarykey_column '
'= :this_1'
') '
'AS foo', dialect=compile_dialect)
def test_adjustable_2(self):
table1 = self.table1
q = table1.select(
table1.c.this_is_the_primarykey_column == 4).alias('foo')
x = select([q])
compile_dialect = default.DefaultDialect(label_length=10)
self.assert_compile(
x, 'SELECT '
'foo.this_1, foo.this_2 '
'FROM ('
'SELECT '
'some_large_named_table.this_is_the_primarykey_column '
'AS this_1, '
'some_large_named_table.this_is_the_data_column '
'AS this_2 '
'FROM '
'some_large_named_table '
'WHERE '
'some_large_named_table.this_is_the_primarykey_column '
'= :this_1'
') '
'AS foo', dialect=compile_dialect)
def test_adjustable_3(self):
table1 = self.table1
compile_dialect = default.DefaultDialect(label_length=4)
q = table1.select(
table1.c.this_is_the_primarykey_column == 4).alias('foo')
x = select([q])
self.assert_compile(
x, 'SELECT '
'foo._1, foo._2 '
'FROM ('
'SELECT '
'some_large_named_table.this_is_the_primarykey_column '
'AS _1, '
'some_large_named_table.this_is_the_data_column '
'AS _2 '
'FROM '
'some_large_named_table '
'WHERE '
'some_large_named_table.this_is_the_primarykey_column '
'= :_1'
') '
'AS foo', dialect=compile_dialect)
def test_adjustable_4(self):
table1 = self.table1
q = table1.select(table1.c.this_is_the_primarykey_column == 4).alias()
x = select([q], use_labels=True)
compile_dialect = default.DefaultDialect(label_length=10)
self.assert_compile(
x, 'SELECT '
'anon_1.this_2 AS anon_1, '
'anon_1.this_4 AS anon_3 '
'FROM ('
'SELECT '
'some_large_named_table.this_is_the_primarykey_column '
'AS this_2, '
'some_large_named_table.this_is_the_data_column '
'AS this_4 '
'FROM '
'some_large_named_table '
'WHERE '
'some_large_named_table.this_is_the_primarykey_column '
'= :this_1'
') '
'AS anon_1', dialect=compile_dialect)
def test_adjustable_5(self):
table1 = self.table1
q = table1.select(table1.c.this_is_the_primarykey_column == 4).alias()
x = select([q], use_labels=True)
compile_dialect = default.DefaultDialect(label_length=4)
self.assert_compile(
x, 'SELECT '
'_1._2 AS _1, '
'_1._4 AS _3 '
'FROM ('
'SELECT '
'some_large_named_table.this_is_the_primarykey_column '
'AS _2, '
'some_large_named_table.this_is_the_data_column '
'AS _4 '
'FROM '
'some_large_named_table '
'WHERE '
'some_large_named_table.this_is_the_primarykey_column '
'= :_1'
') '
'AS _1', dialect=compile_dialect)
def test_adjustable_result_schema_column_1(self):
table1 = self.table1
q = table1.select(
table1.c.this_is_the_primarykey_column == 4).apply_labels().\
alias('foo')
dialect = default.DefaultDialect(label_length=10)
compiled = q.compile(dialect=dialect)
assert set(compiled._create_result_map()['some_2'][1]).issuperset([
table1.c.this_is_the_data_column,
'some_large_named_table_this_is_the_data_column',
'some_2'
])
assert set(compiled._create_result_map()['some_1'][1]).issuperset([
table1.c.this_is_the_primarykey_column,
'some_large_named_table_this_is_the_primarykey_column',
'some_1'
])
def test_adjustable_result_schema_column_2(self):
table1 = self.table1
q = table1.select(
table1.c.this_is_the_primarykey_column == 4).alias('foo')
x = select([q])
dialect = default.DefaultDialect(label_length=10)
compiled = x.compile(dialect=dialect)
assert set(compiled._create_result_map()['this_2'][1]).issuperset([
q.corresponding_column(table1.c.this_is_the_data_column),
'this_is_the_data_column',
'this_2'])
assert set(compiled._create_result_map()['this_1'][1]).issuperset([
q.corresponding_column(table1.c.this_is_the_primarykey_column),
'this_is_the_primarykey_column',
'this_1'])
def test_table_plus_column_exceeds_length(self):
"""test that the truncation only occurs when tablename + colname are
concatenated, if they are individually under the label length.
"""
compile_dialect = default.DefaultDialect(label_length=30)
a_table = table(
'thirty_characters_table_xxxxxx',
column('id')
)
other_table = table(
'other_thirty_characters_table_',
column('id'),
column('thirty_characters_table_id')
)
anon = a_table.alias()
j1 = other_table.outerjoin(
anon,
anon.c.id == other_table.c.thirty_characters_table_id)
self.assert_compile(
select([other_table, anon]).
select_from(j1).apply_labels(),
'SELECT '
'other_thirty_characters_table_.id '
'AS other_thirty_characters__1, '
'other_thirty_characters_table_.thirty_characters_table_id '
'AS other_thirty_characters__2, '
'thirty_characters_table__1.id '
'AS thirty_characters_table__3 '
'FROM '
'other_thirty_characters_table_ '
'LEFT OUTER JOIN '
'thirty_characters_table_xxxxxx AS thirty_characters_table__1 '
'ON thirty_characters_table__1.id = '
'other_thirty_characters_table_.thirty_characters_table_id',
dialect=compile_dialect)
def test_colnames_longer_than_labels_lowercase(self):
t1 = table('a', column('abcde'))
self._test_colnames_longer_than_labels(t1)
def test_colnames_longer_than_labels_uppercase(self):
m = MetaData()
t1 = Table('a', m, Column('abcde', Integer))
self._test_colnames_longer_than_labels(t1)
def _test_colnames_longer_than_labels(self, t1):
dialect = default.DefaultDialect(label_length=4)
a1 = t1.alias(name='asdf')
# 'abcde' is longer than 4, but rendered as itself
# needs to have all characters
s = select([a1])
self.assert_compile(select([a1]),
'SELECT asdf.abcde FROM a AS asdf',
dialect=dialect)
compiled = s.compile(dialect=dialect)
assert set(compiled._create_result_map()['abcde'][1]).issuperset([
'abcde', a1.c.abcde, 'abcde'])
# column still there, but short label
s = select([a1]).apply_labels()
self.assert_compile(s,
'SELECT asdf.abcde AS _1 FROM a AS asdf',
dialect=dialect)
compiled = s.compile(dialect=dialect)
assert set(compiled._create_result_map()['_1'][1]).issuperset([
'asdf_abcde', a1.c.abcde, '_1'])
def test_label_overlap_unlabeled(self):
"""test that an anon col can't overlap with a fixed name, #3396"""
table1 = table(
"tablename", column('columnname_one'), column('columnn_1'))
stmt = select([table1]).apply_labels()
dialect = default.DefaultDialect(label_length=23)
self.assert_compile(
stmt,
"SELECT tablename.columnname_one AS tablename_columnn_1, "
"tablename.columnn_1 AS tablename_columnn_2 FROM tablename",
dialect=dialect
)
compiled = stmt.compile(dialect=dialect)
eq_(
set(compiled._create_result_map()),
set(['tablename_columnn_1', 'tablename_columnn_2'])
)
|
