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from sqlalchemy import extract, select
from sqlalchemy import sql
from sqlalchemy.databases import sybase
from sqlalchemy.testing import assert_raises_message, \
fixtures, AssertsCompiledSQL
class CompileTest(fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = sybase.dialect()
def test_extract(self):
t = sql.table('t', sql.column('col1'))
mapping = {
'day': 'day',
'doy': 'dayofyear',
'dow': 'weekday',
'milliseconds': 'millisecond',
'millisecond': 'millisecond',
'year': 'year',
}
for field, subst in list(mapping.items()):
self.assert_compile(
select([extract(field, t.c.col1)]),
'SELECT DATEPART("%s", t.col1) AS anon_1 FROM t' % subst)
def test_offset_not_supported(self):
stmt = select([1]).offset(10)
assert_raises_message(
NotImplementedError,
"Sybase ASE does not support OFFSET",
stmt.compile, dialect=self.__dialect__
)
def test_delete_extra_froms(self):
t1 = sql.table('t1', sql.column('c1'))
t2 = sql.table('t2', sql.column('c1'))
q = sql.delete(t1).where(t1.c.c1 == t2.c.c1)
self.assert_compile(
q, "DELETE FROM t1 FROM t1, t2 WHERE t1.c1 = t2.c1"
)
def test_delete_extra_froms_alias(self):
a1 = sql.table('t1', sql.column('c1')).alias('a1')
t2 = sql.table('t2', sql.column('c1'))
q = sql.delete(a1).where(a1.c.c1 == t2.c.c1)
self.assert_compile(
q, "DELETE FROM a1 FROM t1 AS a1, t2 WHERE a1.c1 = t2.c1"
)
self.assert_compile(sql.delete(a1), "DELETE FROM t1 AS a1")
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