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 nullif(value, null_if_expr):
"""
Set values to null if they match/equal a particular expression (scalar or
array-valued).
Common use to avoid divide-by-zero problems (get NULL instead of INF on
divide-by-zero): 5 / expr.nullif(0)
Parameters
----------
value : value expression
Value to modify
null_if_expr : value expression (array or scalar)
Returns
-------
null_if : type of caller
"""
return _ops.NullIf(value, null_if_expr).to_expr()
def nullif(self, null_if_expr: Value) -> Value:
"""Set values to null if they equal the values `null_if_expr`.
Commonly use to avoid divide-by-zero problems by replacing zero with
`NULL` in the divisor.
Parameters
----------
null_if_expr
Expression indicating what values should be NULL
Returns
-------
Value
Value expression
"""
import ibis.expr.operations as ops
return ops.NullIf(self, null_if_expr).to_expr()