def __init__(self, name, table_expr):
Node.__init__(self, [name, table_expr])
if name not in table_expr.schema():
raise KeyError("'{0}' is not a field".format(name))
self.name = name
self.table = table_expr
def __init__(self, name, table_expr):
Node.__init__(self, [name, table_expr])
if name not in table_expr.schema():
raise KeyError("'{0}' is not a field".format(name))
self.name = name
self.table = table_expr
def __init__(self, table):
if not isinstance(table, TableExpr):
raise com.ExpressionError('Requires table')
schema = table.schema()
if len(schema) > 1:
raise com.ExpressionError('Table can only have a single column')
self.table = table
self.name = schema.names[0]
Node.__init__(self, [table])
def __init__(self, table):
if not isinstance(table, TableExpr):
raise com.ExpressionError('Requires table')
schema = table.schema()
if len(schema) > 1:
raise com.ExpressionError('Table can only have a single column')
self.table = table
self.name = schema.names[0]
Node.__init__(self, [table])
def __init__(self, arg, k, by=None):
if by is None:
by = arg.count()
if not isinstance(arg, ArrayExpr):
raise TypeError(arg)
if not isinstance(k, int) or k < 0:
raise ValueError('k must be positive integer, was: {0}'.format(k))
self.arg = arg
self.k = k
self.by = by
Node.__init__(self, [arg, k, by])
def __init__(self, arg, k, by=None):
if by is None:
by = arg.count()
if not isinstance(arg, ArrayExpr):
raise TypeError(arg)
if not isinstance(k, int) or k < 0:
raise ValueError('k must be positive integer, was: {0}'.format(k))
self.arg = arg
self.k = k
self.by = by
Node.__init__(self, [arg, k, by])
def __init__(self, left, right, predicates):
if not rules.is_table(left):
raise TypeError("Can only join table expressions, got %s for " "left table" % type(left))
if not rules.is_table(right):
raise TypeError("Can only join table expressions, got %s for " "right table" % type(left))
(self.left, self.right, self.predicates) = self._make_distinct(left, right, predicates)
# Validate join predicates. Each predicate must be valid jointly when
# considering the roots of each input table
from ibis.expr.analysis import CommonSubexpr
validator = CommonSubexpr([self.left, self.right])
validator.validate_all(self.predicates)
Node.__init__(self, [self.left, self.right, self.predicates])
def __init__(self, table_expr, proj_exprs):
from ibis.expr.analysis import ExprValidator
# Need to validate that the column expressions are compatible with the
# input table; this means they must either be scalar expressions or
# array expressions originating from the same root table expression
validator = ExprValidator([table_expr])
# Resolve schema and initialize
types = []
names = []
clean_exprs = []
for expr in proj_exprs:
if isinstance(expr, py_string):
expr = table_expr[expr]
validator.assert_valid(expr)
if isinstance(expr, ValueExpr):
name = expr.get_name()
names.append(name)
types.append(expr.type())
elif rules.is_table(expr):
schema = expr.schema()
names.extend(schema.names)
types.extend(schema.types)
else:
raise NotImplementedError
clean_exprs.append(expr)
# validate uniqueness
schema = ir.Schema(names, types)
HasSchema.__init__(self, schema)
Node.__init__(self, [table_expr] + [clean_exprs])
self.table = table_expr
self.selections = clean_exprs
def __init__(self, table_expr, proj_exprs):
from ibis.expr.analysis import ExprValidator
# Need to validate that the column expressions are compatible with the
# input table; this means they must either be scalar expressions or
# array expressions originating from the same root table expression
validator = ExprValidator([table_expr])
# Resolve schema and initialize
types = []
names = []
clean_exprs = []
for expr in proj_exprs:
if isinstance(expr, py_string):
expr = table_expr[expr]
validator.assert_valid(expr)
if isinstance(expr, ValueExpr):
name = expr.get_name()
names.append(name)
types.append(expr.type())
elif rules.is_table(expr):
schema = expr.schema()
names.extend(schema.names)
types.extend(schema.types)
else:
raise NotImplementedError
clean_exprs.append(expr)
# validate uniqueness
schema = ir.Schema(names, types)
HasSchema.__init__(self, schema)
Node.__init__(self, [table_expr] + [clean_exprs])
self.table = table_expr
self.selections = clean_exprs
def __init__(self, left, right, join_predicates):
from ibis.expr.analysis import ExprValidator
if not rules.is_table(left):
raise TypeError('Can only join table expressions, got %s for '
'left table' % type(left))
if not rules.is_table(right):
raise TypeError('Can only join table expressions, got %s for '
'right table' % type(left))
if left.equals(right):
right = right.view()
self.left = left
self.right = right
self.predicates = self._clean_predicates(join_predicates)
# Validate join predicates. Each predicate must be valid jointly when
# considering the roots of each input table
validator = ExprValidator([self.left, self.right])
validator.validate_all(self.predicates)
Node.__init__(self, [self.left, self.right, self.predicates])
def __init__(self, left, right, join_predicates):
from ibis.expr.analysis import ExprValidator
if not rules.is_table(left):
raise TypeError('Can only join table expressions, got %s for '
'left table' % type(left))
if not rules.is_table(right):
raise TypeError('Can only join table expressions, got %s for '
'right table' % type(left))
if left.equals(right):
right = right.view()
self.left = left
self.right = right
self.predicates = self._clean_predicates(join_predicates)
# Validate join predicates. Each predicate must be valid jointly when
# considering the roots of each input table
validator = ExprValidator([self.left, self.right])
validator.validate_all(self.predicates)
Node.__init__(self, [self.left, self.right, self.predicates])
