def test_instance_of_operation():
class MyOperation(ops.Node):
arg = Arg(ir.IntegerValue)
MyOperation(ir.literal(5))
with pytest.raises(IbisTypeError):
MyOperation(ir.literal('string'))
def test_instance_of_operation():
class MyOperation(ops.Node):
arg = Arg(ir.IntegerValue)
MyOperation(ir.literal(5))
with pytest.raises(IbisTypeError):
MyOperation(ir.literal('string'))
def _set_literal_format(translator, expr):
value_type = expr.type().value_type
formatted = [translator.translate(ir.literal(x, type=value_type))
for x in expr.op().value]
return '({})'.format(', '.join(formatted))
def array_of(inner, arg):
val = arg if isinstance(arg, ir.Expr) else ir.literal(arg)
argtype = val.type()
if not isinstance(argtype, dt.Array):
raise com.IbisTypeError(
'Argument must be an array, got expression {} which is of type '
'{}'.format(val, val.type()))
return value(dt.Array(inner(val[0]).type()), val)
def _timestamp_from_str(value: str,
timezone: str | None = None) -> ir.TimestampScalar:
try:
value = pd.Timestamp(value, tz=timezone)
except pd.errors.OutOfBoundsDatetime:
value = dateutil.parser.parse(value)
dtype = dt.Timestamp(
timezone=timezone if timezone is not None else value.tzname())
return literal(value, type=dtype)
def array_of(inner, arg):
val = arg if isinstance(arg, ir.Expr) else ir.literal(arg)
argtype = val.type()
if not isinstance(argtype, dt.Array):
raise com.IbisTypeError(
'Argument must be an array, got expression {} which is of type '
'{}'.format(val, val.type())
)
return value(dt.Array(inner(val[0]).type()), val)
def _set_literal_format(translator, expr):
value_type = expr.type().value_type
formatted = [
translator.translate(ir.literal(x, type=value_type))
for x in expr.op().value
]
return '({})'.format(', '.join(formatted))
def test_ops_smoke():
expr = ir.literal(3)
ops.UnaryOp(expr)
ops.Cast(expr, to='int64')
ops.TypeOf(arg=2)
ops.Negate(4)
ops.Negate(4.0)
ops.NullIfZero(0)
ops.NullIfZero(1)
ops.IsNull(ir.null())
ops.NotNull(ir.null())
ops.ZeroIfNull(ir.null())
ops.IfNull(1, ops.NullIfZero(0).to_expr())
ops.NullIf(ir.null(), ops.NullIfZero(0).to_expr())
ops.IsNan(np.nan)
ops.IsInf(np.inf)
ops.Ceil(4.5)
ops.Floor(4.5)
ops.Round(3.43456)
ops.Round(3.43456, 2)
ops.Round(3.43456, digits=1)
ops.Clip(123, lower=30)
ops.Clip(123, lower=30, upper=100)
ops.BaseConvert('EEE', from_base=16, to_base=10)
ops.Logarithm(100)
ops.Log(100)
ops.Log(100, base=2)
ops.Ln(100)
ops.Log2(100)
ops.Log10(100)
ops.Uppercase('asd')
ops.Lowercase('asd')
ops.Reverse('asd')
ops.Strip('asd')
ops.LStrip('asd')
ops.RStrip('asd')
ops.Capitalize('asd')
ops.Substring('asd', start=1)
ops.Substring('asd', 1)
ops.Substring('asd', 1, length=2)
ops.StrRight('asd', nchars=2)
ops.Repeat('asd', times=4)
ops.StringFind('asd', 'sd', start=1)
ops.Translate('asd', from_str='bd', to_str='ce')
ops.LPad('asd', length=2, pad='ss')
ops.RPad('asd', length=2, pad='ss')
ops.StringJoin(',', ['asd', 'bsdf'])
ops.FuzzySearch('asd', pattern='n')
ops.StringSQLLike('asd', pattern='as', escape='asd')
ops.RegexExtract('asd', pattern='as', index=1)
ops.RegexReplace('asd', 'as', 'a')
ops.StringReplace('asd', 'as', 'a')
ops.StringSplit('asd', 's')
ops.StringConcat(['s', 'e'])
ops.StartsWith('asd', 'as')
ops.EndsWith('asd', 'xyz')
def array_of(inner, arg, **kwargs):
val = arg if isinstance(arg, ir.Expr) else ir.literal(arg)
argtype = val.type()
if not isinstance(argtype, dt.Array):
raise com.IbisTypeError(
'Argument must be an array, '
f'got expression which is of type {val.type()}')
value_dtype = inner(val[0], **kwargs).type()
array_dtype = dt.Array(value_dtype)
return value(array_dtype, val, **kwargs)
def test_ops_smoke():
expr = ir.literal(3)
ops.UnaryOp(expr)
ops.Cast(expr, to='int64')
ops.TypeOf(arg=2)
ops.Negate(4)
ops.Negate(4.0)
ops.NullIfZero(0)
ops.NullIfZero(1)
ops.IsNull(ir.null())
ops.NotNull(ir.null())
ops.ZeroIfNull(ir.null())
ops.IfNull(1, ops.NullIfZero(0).to_expr())
ops.NullIf(ir.null(), ops.NullIfZero(0).to_expr())
ops.IsNan(np.nan)
ops.IsInf(np.inf)
ops.Ceil(4.5)
ops.Floor(4.5)
ops.Round(3.43456)
ops.Round(3.43456, 2)
ops.Round(3.43456, digits=1)
ops.Clip(123, lower=30)
ops.Clip(123, lower=30, upper=100)
ops.BaseConvert('EEE', from_base=16, to_base=10)
ops.Logarithm(100)
ops.Log(100)
ops.Log(100, base=2)
ops.Ln(100)
ops.Log2(100)
ops.Log10(100)
ops.Uppercase('asd')
ops.Lowercase('asd')
ops.Reverse('asd')
ops.Strip('asd')
ops.LStrip('asd')
ops.RStrip('asd')
ops.Capitalize('asd')
ops.Substring('asd', start=1)
ops.Substring('asd', 1)
ops.Substring('asd', 1, length=2)
ops.StrRight('asd', nchars=2)
ops.Repeat('asd', times=4)
ops.StringFind('asd', 'sd', start=1)
ops.Translate('asd', from_str='bd', to_str='ce')
ops.LPad('asd', length=2, pad='ss')
ops.RPad('asd', length=2, pad='ss')
ops.StringJoin(',', ['asd', 'bsdf'])
ops.FuzzySearch('asd', pattern='n')
ops.StringSQLLike('asd', pattern='as', escape='asd')
ops.RegexExtract('asd', pattern='as', index=1)
ops.RegexReplace('asd', 'as', 'a')
ops.StringReplace('asd', 'as', 'a')
ops.StringSplit('asd', 's')
ops.StringConcat(['s', 'e'])
def _exists_subquery(t, expr):
op = expr.op()
ctx = t.context
filtered = (op.foreign_table.filter(op.predicates)
.projection([ir.literal(1).name(ir.unnamed)]))
sub_ctx = ctx.subcontext()
clause = to_sqlalchemy(filtered, context=sub_ctx, exists=True)
if isinstance(op, transforms.NotExistsSubquery):
clause = sa.not_(clause)
return clause
def _exists_subquery(t, expr):
op = expr.op()
ctx = t.context
filtered = op.foreign_table.filter(op.predicates).projection(
[ir.literal(1).name(ir.unnamed)])
sub_ctx = ctx.subcontext()
clause = to_sqlalchemy(filtered, sub_ctx, exists=True)
if isinstance(op, transforms.NotExistsSubquery):
clause = sa.not_(clause)
return clause
def _exists_subquery(t, expr):
from .query_builder import AlchemyCompiler
op = expr.op()
ctx = t.context
filtered = op.foreign_table.filter(op.predicates).projection(
[ir.literal(1).name(ir.unnamed)])
sub_ctx = ctx.subcontext()
clause = AlchemyCompiler.to_sql(filtered, sub_ctx, exists=True)
if isinstance(op, ops.NotExistsSubquery):
clause = sa.not_(clause)
return clause
def _exists_subquery(translator, expr):
op = expr.op()
ctx = translator.context
expr = (op.foreign_table.filter(op.predicates).projection(
[ir.literal(1).name(ir.unnamed)]))
subquery = ctx.get_formatted_query(expr)
if isinstance(op, transforms.ExistsSubquery):
key = 'EXISTS'
elif isinstance(op, transforms.NotExistsSubquery):
key = 'NOT EXISTS'
else:
raise NotImplementedError
return '{0} (\n{1}\n)'.format(key, util.indent(subquery, ctx.indent))
def _exists_subquery(translator, expr):
op = expr.op()
ctx = translator.context
expr = (op.foreign_table
.filter(op.predicates)
.projection([ir.literal(1).name(ir.unnamed)]))
subquery = ctx.get_compiled_expr(expr)
if isinstance(op, transforms.ExistsSubquery):
key = 'EXISTS'
elif isinstance(op, transforms.NotExistsSubquery):
key = 'NOT EXISTS'
else:
raise NotImplementedError
return '{0} (\n{1}\n)'.format(key, util.indent(subquery, ctx.indent))
def exists_subquery(translator, expr):
op = expr.op()
ctx = translator.context
dummy = ir.literal(1).name(ir.core.unnamed)
filtered = op.foreign_table.filter(op.predicates)
expr = filtered.projection([dummy])
subquery = ctx.get_compiled_expr(expr)
if isinstance(op, ops.ExistsSubquery):
key = 'EXISTS'
elif isinstance(op, ops.NotExistsSubquery):
key = 'NOT EXISTS'
else:
raise NotImplementedError
return f'{key} (\n{util.indent(subquery, ctx.indent)}\n)'
def value(dtype, arg):
"""Validates that the given argument is a Value with a particular datatype
Parameters
----------
dtype : DataType subclass or DataType instance
arg : python literal or an ibis expression
If a python literal is given the validator tries to coerce it to an ibis
literal.
Returns
-------
arg : AnyValue
An ibis value expression with the specified datatype
"""
if not isinstance(arg, ir.Expr):
# coerce python literal to ibis literal
arg = ir.literal(arg)
if not isinstance(arg, ir.AnyValue):
raise com.IbisTypeError(
'Given argument with type {} is not a value '
'expression'.format(type(arg))
)
# retrieve literal values for implicit cast check
value = getattr(arg.op(), 'value', None)
if isinstance(dtype, type) and isinstance(arg.type(), dtype):
# dtype class has been specified like dt.Interval or dt.Decimal
return arg
elif dt.castable(arg.type(), dt.dtype(dtype), value=value):
# dtype instance or string has been specified and arg's dtype is
# implicitly castable to it, like dt.int8 is castable to dt.int64
return arg
else:
raise com.IbisTypeError(
'Given argument with datatype {} is not '
'subtype of {} nor implicitly castable to '
'it'.format(arg.type(), dtype)
)
def value(dtype, arg):
"""Validates that the given argument is a Value with a particular datatype
Parameters
----------
dtype : DataType subclass or DataType instance
arg : python literal or an ibis expression
If a python literal is given the validator tries to coerce it to an ibis
literal.
Returns
-------
arg : AnyValue
An ibis value expression with the specified datatype
"""
if not isinstance(arg, ir.Expr):
# coerce python literal to ibis literal
arg = ir.literal(arg)
if not isinstance(arg, ir.AnyValue):
raise com.IbisTypeError(
'Given argument with type {} is not a value '
'expression'.format(type(arg))
)
# retrieve literal values for implicit cast check
value = getattr(arg.op(), 'value', None)
if isinstance(dtype, type) and isinstance(arg.type(), dtype):
# dtype class has been specified like dt.Interval or dt.Decimal
return arg
elif dt.castable(arg.type(), dt.dtype(dtype), value=value):
# dtype instance or string has been specified and arg's dtype is
# implicitly castable to it, like dt.int8 is castable to dt.int64
return arg
else:
raise com.IbisTypeError(
'Given argument with datatype {} is not '
'subtype of {} nor implicitly castable to '
'it'.format(arg.type(), dtype)
)
def _(value) -> ir.DateScalar:
return literal(value, type=dt.date)
def _(value, timezone: str | None = None) -> ir.TimestampScalar:
return literal(value, type=dt.Timestamp(timezone=timezone))
def _date_from_timestamp(value) -> ir.DateScalar:
return literal(value, type=dt.date)
def _(value: str, timezone: str | None = None) -> ir.TimestampScalar:
try:
value = pd.Timestamp(value, tz=timezone)
except pd.errors.OutOfBoundsDatetime:
value = dateutil.parser.parse(value)
return literal(value, type=dt.Timestamp(timezone=timezone))
def interval(
value: int | datetime.timedelta | None = None,
unit: str = 's',
years: int | None = None,
quarters: int | None = None,
months: int | None = None,
weeks: int | None = None,
days: int | None = None,
hours: int | None = None,
minutes: int | None = None,
seconds: int | None = None,
milliseconds: int | None = None,
microseconds: int | None = None,
nanoseconds: int | None = None,
) -> ir.IntervalScalar:
"""Return an interval literal expression.
Parameters
----------
value
Interval value. If passed, must be combined with `unit`.
unit
Unit of `value`
years
Number of years
quarters
Number of quarters
months
Number of months
weeks
Number of weeks
days
Number of days
hours
Number of hours
minutes
Number of minutes
seconds
Number of seconds
milliseconds
Number of milliseconds
microseconds
Number of microseconds
nanoseconds
Number of nanoseconds
Returns
-------
IntervalScalar
An interval expression
"""
if value is not None:
if isinstance(value, datetime.timedelta):
unit = 's'
value = int(value.total_seconds())
elif not isinstance(value, int):
raise ValueError('Interval value must be an integer')
else:
kwds = [
('Y', years),
('Q', quarters),
('M', months),
('W', weeks),
('D', days),
('h', hours),
('m', minutes),
('s', seconds),
('ms', milliseconds),
('us', microseconds),
('ns', nanoseconds),
]
defined_units = [(k, v) for k, v in kwds if v is not None]
if len(defined_units) != 1:
raise ValueError('Exactly one argument is required')
unit, value = defined_units[0]
value_type = literal(value).type()
type = dt.Interval(unit, value_type=value_type)
return literal(value, type=type).op().to_expr()
def _(value: str) -> ir.TimeScalar:
return literal(pd.to_datetime(value).time(), type=dt.time)
def time(value) -> TimeValue:
return literal(value, type=dt.time)
def _(value: str) -> ir.DateScalar:
return literal(pd.to_datetime(value).date(), type=dt.date)
