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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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