def _table_count(self):
"""
Returns the computed number of rows in the table expression
Returns
-------
count : Int64Scalar
"""
return _ops.Count(self, None).to_expr().name('count')
def count(self) -> ir.IntegerScalar:
"""Compute the number of rows in the table.
Returns
-------
IntegerScalar
Number of rows in the table
"""
from .. import operations as ops
return ops.Count(self, None).to_expr().name("count")
def count(self, where: ir.BooleanValue | None = None) -> ir.IntegerScalar:
"""Compute the number of rows in an expression.
Parameters
----------
where
Filter expression
Returns
-------
IntegerScalar
Number of elements in an expression
"""
import ibis.expr.operations as ops
return ops.Count(self, where).to_expr().name("count")
def count(expr, where=None):
"""
Compute cardinality / sequence size of expression. For array expressions,
the count is excluding nulls. For tables, it's the size of the entire
table.
Returns
-------
counts : int64 type
"""
op = expr.op()
if isinstance(op, _ops.DistinctArray):
if where is not None:
raise NotImplementedError
result = op.count().to_expr()
else:
result = _ops.Count(expr, where).to_expr()
return result.name('count')