def filter(table, predicates):
"""
Select rows from table based on boolean expressions
Parameters
----------
predicates : boolean array expressions, or list thereof
Returns
-------
filtered_expr : TableExpr
"""
if isinstance(predicates, Expr):
predicates = _L.unwrap_ands(predicates)
predicates = util.promote_list(predicates)
predicates = [ir.bind_expr(table, x) for x in predicates]
resolved_predicates = []
for pred in predicates:
if isinstance(pred, ir.AnalyticExpr):
pred = pred.to_filter()
resolved_predicates.append(pred)
op = _L.apply_filter(table, resolved_predicates)
return TableExpr(op)
def filter(table, predicates):
"""
Select rows from table based on boolean expressions
Parameters
----------
predicates : boolean array expressions, or list thereof
Returns
-------
filtered_expr : TableExpr
"""
if isinstance(predicates, Expr):
predicates = _L.unwrap_ands(predicates)
predicates = util.promote_list(predicates)
predicates = [ir.bind_expr(table, x) for x in predicates]
resolved_predicates = []
for pred in predicates:
if isinstance(pred, ir.AnalyticExpr):
pred = pred.to_filter()
resolved_predicates.append(pred)
op = _L.apply_filter(table, resolved_predicates)
return TableExpr(op)
def _resolve_predicates(table, predicates):
if isinstance(predicates, Expr):
predicates = _L.unwrap_ands(predicates)
predicates = util.promote_list(predicates)
predicates = [ir.bind_expr(table, x) for x in predicates]
resolved_predicates = []
for pred in predicates:
if isinstance(pred, ir.AnalyticExpr):
pred = pred.to_filter()
resolved_predicates.append(pred)
return resolved_predicates
def _rewrite_exprs(self, what):
from ibis.expr.analysis import substitute_parents
what = util.promote_list(what)
all_exprs = []
for expr in what:
if isinstance(expr, ir.ExprList):
all_exprs.extend(expr.exprs())
else:
bound_expr = ir.bind_expr(self.table, expr)
all_exprs.append(bound_expr)
return [substitute_parents(x, past_projection=False)
for x in all_exprs]
def _rewrite_exprs(self, what):
from ibis.expr.analysis import substitute_parents
what = util.promote_list(what)
all_exprs = []
for expr in what:
if isinstance(expr, ir.ExprList):
all_exprs.extend(expr.exprs())
else:
bound_expr = ir.bind_expr(self.table, expr)
all_exprs.append(bound_expr)
return [
substitute_parents(x, past_projection=False) for x in all_exprs
]
