def test_nullable_column_propagated():
t = ibis.table([
('a', dt.Int32(nullable=True)),
('b', dt.Int32(nullable=False)),
('c', dt.String(nullable=False)),
('d', dt.float64), # nullable by default
('f', dt.Float64(nullable=False)),
])
assert t.a.type().nullable is True
assert t.b.type().nullable is False
assert t.c.type().nullable is False
assert t.d.type().nullable is True
assert t.f.type().nullable is False
s = t.a + t.d
assert s.type().nullable is True
s = t.b + t.d
assert s.type().nullable is True
s = t.b + t.f
assert s.type().nullable is False
def sa_mysql_double(_, satype, nullable=True):
# TODO: handle asdecimal=True
return dt.Float64(nullable=nullable)
def sa_double(_, satype, nullable=True):
return dt.Float64(nullable=nullable)
def mysql_double(satype, nullable=True):
return dt.Float64(nullable=nullable)
def parse(text: str) -> DataType:
@p.generate
def datetime():
yield dt.spaceless_string("datetime64", "datetime")
timezone = yield parened_string.optional()
return dt.Timestamp(timezone=timezone, nullable=False)
primitive = (
datetime
| dt.spaceless_string("null", "nothing").result(dt.null)
| dt.spaceless_string("bigint", "int64").result(
dt.Int64(nullable=False))
| dt.spaceless_string("double", "float64").result(
dt.Float64(nullable=False))
| dt.spaceless_string("float32", "float").result(
dt.Float32(nullable=False))
| dt.spaceless_string("smallint", "int16", "int2").result(
dt.Int16(nullable=False))
| dt.spaceless_string("date32", "date").result(dt.Date(nullable=False))
| dt.spaceless_string("time").result(dt.Time(nullable=False))
| dt.spaceless_string("tinyint", "int8", "int1", "boolean",
"bool").result(dt.Int8(nullable=False))
| dt.spaceless_string("integer", "int32", "int4", "int").result(
dt.Int32(nullable=False))
| dt.spaceless_string("uint64").result(dt.UInt64(nullable=False))
| dt.spaceless_string("uint32").result(dt.UInt32(nullable=False))
| dt.spaceless_string("uint16").result(dt.UInt16(nullable=False))
| dt.spaceless_string("uint8").result(dt.UInt8(nullable=False))
| dt.spaceless_string("uuid").result(dt.UUID(nullable=False))
| dt.spaceless_string(
"longtext",
"mediumtext",
"tinytext",
"text",
"longblob",
"mediumblob",
"tinyblob",
"blob",
"varchar",
"char",
"string",
).result(dt.String(nullable=False)))
@p.generate
def parened_string():
yield dt.LPAREN
s = yield dt.RAW_STRING
yield dt.RPAREN
return s
@p.generate
def nullable():
yield dt.spaceless_string("nullable")
yield dt.LPAREN
parsed_ty = yield ty
yield dt.RPAREN
return parsed_ty(nullable=True)
@p.generate
def fixed_string():
yield dt.spaceless_string("fixedstring")
yield dt.LPAREN
yield dt.NUMBER
yield dt.RPAREN
return dt.String(nullable=False)
@p.generate
def decimal():
yield dt.spaceless_string("decimal", "numeric")
precision, scale = yield dt.LPAREN.then(
p.seq(dt.PRECISION.skip(dt.COMMA), dt.SCALE)).skip(dt.RPAREN)
return dt.Decimal(precision, scale, nullable=False)
@p.generate
def paren_type():
yield dt.LPAREN
value_type = yield ty
yield dt.RPAREN
return value_type
@p.generate
def array():
yield dt.spaceless_string("array")
value_type = yield paren_type
return dt.Array(value_type, nullable=False)
@p.generate
def map():
yield dt.spaceless_string("map")
yield dt.LPAREN
key_type = yield ty
yield dt.COMMA
value_type = yield ty
yield dt.RPAREN
return dt.Map(key_type, value_type, nullable=False)
at_least_one_space = p.regex(r"\s+")
@p.generate
def nested():
yield dt.spaceless_string("nested")
yield dt.LPAREN
field_names_types = yield (p.seq(
dt.SPACES.then(dt.FIELD.skip(at_least_one_space)),
ty).combine(lambda field, ty:
(field, dt.Array(ty, nullable=False))).sep_by(
dt.COMMA))
yield dt.RPAREN
return dt.Struct.from_tuples(field_names_types, nullable=False)
@p.generate
def struct():
yield dt.spaceless_string("tuple")
yield dt.LPAREN
field_names_types = yield (p.seq(
dt.SPACES.then(dt.FIELD.skip(at_least_one_space).optional()),
ty,
).combine(lambda field, ty: (field, ty)).sep_by(dt.COMMA))
yield dt.RPAREN
return dt.Struct.from_tuples(
[(field_name if field_name is not None else f"f{i:d}", typ)
for i, (field_name, typ) in enumerate(field_names_types)],
nullable=False,
)
ty = (nullable
| nested
| primitive
| fixed_string
| decimal
| array
| map
| struct)
return ty.parse(text)
assert df.datetime_col.dtype.name == 'datetime64[ns]'
@pytest.mark.parametrize(
('ch_type', 'ibis_type'),
[
('Array(Int8)', dt.Array(dt.Int8(nullable=False))),
('Array(Int16)', dt.Array(dt.Int16(nullable=False))),
('Array(Int32)', dt.Array(dt.Int32(nullable=False))),
('Array(Int64)', dt.Array(dt.Int64(nullable=False))),
('Array(UInt8)', dt.Array(dt.UInt8(nullable=False))),
('Array(UInt16)', dt.Array(dt.UInt16(nullable=False))),
('Array(UInt32)', dt.Array(dt.UInt32(nullable=False))),
('Array(UInt64)', dt.Array(dt.UInt64(nullable=False))),
('Array(Float32)', dt.Array(dt.Float32(nullable=False))),
('Array(Float64)', dt.Array(dt.Float64(nullable=False))),
('Array(String)', dt.Array(dt.String(nullable=False))),
('Array(FixedString(32))', dt.Array(dt.String(nullable=False))),
('Array(Date)', dt.Array(dt.Date(nullable=False))),
('Array(DateTime)', dt.Array(dt.Timestamp(nullable=False))),
('Array(DateTime64)', dt.Array(dt.Timestamp(nullable=False))),
('Array(Nothing)', dt.Array(dt.Null(nullable=False))),
('Array(Null)', dt.Array(dt.Null(nullable=False))),
('Array(Array(Int8))', dt.Array(dt.Array(dt.Int8(nullable=False)))),
(
'Array(Array(Array(Int8)))',
dt.Array(dt.Array(dt.Array(dt.Int8(nullable=False)))),
),
(
'Array(Array(Array(Array(Int8))))',
dt.Array(dt.Array(dt.Array(dt.Array(dt.Int8(nullable=False))))),
pytest.importorskip("clickhouse_driver")
@pytest.mark.parametrize(
('to_type', 'expected'),
[
param('int8', 'CAST(`double_col` AS Nullable(Int8))', id="int8"),
param('int16', 'CAST(`double_col` AS Nullable(Int16))', id="int16"),
param('float32',
'CAST(`double_col` AS Nullable(Float32))',
id="float32"),
param('float', '`double_col`', id="float"),
# alltypes.double_col is non-nullable
param(
dt.Float64(nullable=False),
'CAST(`double_col` AS Float64)',
id="float64",
),
],
)
def test_cast_double_col(alltypes, translate, to_type, expected):
expr = alltypes.double_col.cast(to_type)
assert translate(expr) == expected
@pytest.mark.parametrize(
('to_type', 'expected'),
[
('int8', 'CAST(`string_col` AS Nullable(Int8))'),
('int16', 'CAST(`string_col` AS Nullable(Int16))'),
def test_insert_with_more_columns(temporary_alltypes, df):
temporary = temporary_alltypes
records = df[:10].copy()
records['non_existing_column'] = 'raise on me'
with pytest.raises(AssertionError):
temporary.insert(records)
@pytest.mark.parametrize(
("query", "expected_schema"),
[
(
"SELECT 1 as a, 2 + dummy as b",
ibis.schema(
dict(a=dt.UInt8(nullable=False), b=dt.UInt16(nullable=False))),
),
(
"SELECT string_col, sum(double_col) as b FROM functional_alltypes GROUP BY string_col", # noqa: E501
ibis.schema(
dict(
string_col=dt.String(nullable=True),
b=dt.Float64(nullable=True),
)),
),
],
)
def test_get_schema_using_query(con, query, expected_schema):
result = con._get_schema_using_query(query)
assert result == expected_schema
[
('Array(Int8)', dt.Array(dt.Int8(nullable=False), nullable=False)),
('Array(Int16)', dt.Array(dt.Int16(nullable=False), nullable=False)),
('Array(Int32)', dt.Array(dt.Int32(nullable=False), nullable=False)),
('Array(Int64)', dt.Array(dt.Int64(nullable=False), nullable=False)),
('Array(UInt8)', dt.Array(dt.UInt8(nullable=False), nullable=False)),
('Array(UInt16)', dt.Array(dt.UInt16(nullable=False), nullable=False)),
('Array(UInt32)', dt.Array(dt.UInt32(nullable=False), nullable=False)),
('Array(UInt64)', dt.Array(dt.UInt64(nullable=False), nullable=False)),
(
'Array(Float32)',
dt.Array(dt.Float32(nullable=False), nullable=False),
),
(
'Array(Float64)',
dt.Array(dt.Float64(nullable=False), nullable=False),
),
('Array(String)', dt.Array(dt.String(nullable=False), nullable=False)),
(
'Array(FixedString(32))',
dt.Array(dt.String(nullable=False), nullable=False),
),
('Array(Date)', dt.Array(dt.Date(nullable=False), nullable=False)),
(
'Array(DateTime)',
dt.Array(dt.Timestamp(nullable=False), nullable=False),
),
(
'Array(DateTime64)',
dt.Array(dt.Timestamp(nullable=False), nullable=False),
),
