def compile_ConfigSet(
expr: qlast.ConfigSet, *,
ctx: context.ContextLevel,
) -> irast.Set:
info = _validate_op(expr, ctx=ctx)
param_val = setgen.ensure_set(
dispatch.compile(expr.expr, ctx=ctx), ctx=ctx)
try:
ireval.evaluate(param_val, schema=ctx.env.schema)
except ireval.UnsupportedExpressionError as e:
raise errors.QueryError(
f'non-constant expression in CONFIGURE {expr.scope} SET',
context=expr.expr.context
) from e
config_set = irast.ConfigSet(
name=info.param_name,
cardinality=info.cardinality,
scope=expr.scope,
requires_restart=info.requires_restart,
backend_setting=info.backend_setting,
context=expr.context,
expr=param_val,
)
return setgen.ensure_set(config_set, ctx=ctx)
def compile_ConfigSet(
expr: qlast.ConfigSet, *,
ctx: context.ContextLevel,
) -> irast.ConfigSet:
info = _validate_op(expr, ctx=ctx)
param_val = dispatch.compile(expr.expr, ctx=ctx)
try:
ireval.evaluate(param_val, schema=ctx.env.schema)
except ireval.UnsupportedExpressionError as e:
level = 'SYSTEM' if expr.system else 'SESSION'
raise errors.QueryError(
f'non-constant expression in CONFIGURE {level} SET',
context=expr.expr.context
) from e
return irast.ConfigSet(
name=info.param_name,
cardinality=info.cardinality,
system=expr.system,
requires_restart=info.requires_restart,
backend_setting=info.backend_setting,
context=expr.context,
expr=param_val,
)
def compile_UnaryOp(expr: qlast.Base, *,
ctx: context.ContextLevel) -> irast.Set:
result = func.compile_operator(expr,
op_name=expr.op,
qlargs=[expr.operand],
ctx=ctx)
try:
result = ireval.evaluate(result, schema=ctx.env.schema)
except ireval.UnsupportedExpressionError:
pass
return setgen.ensure_set(result, ctx=ctx)
def try_fold_binop(opcall: irast.OperatorCall, *,
ctx: context.ContextLevel) -> typing.Optional[irast.Set]:
try:
const = ireval.evaluate(opcall, schema=ctx.env.schema)
except ireval.UnsupportedExpressionError:
anyreal = ctx.env.schema.get('std::anyreal')
if (opcall.func_shortname in ('std::+', 'std::*')
and opcall.operator_kind is ft.OperatorKind.INFIX and all(
setgen.get_set_type(a.expr, ctx=ctx).issubclass(
ctx.env.schema, anyreal) for a in opcall.args)):
return try_fold_associative_binop(opcall, ctx=ctx)
else:
return setgen.ensure_set(const, ctx=ctx)
def try_fold_associative_binop(
opcall: irast.OperatorCall, *,
ctx: context.ContextLevel) -> typing.Optional[irast.Set]:
# Let's check if we have (CONST + (OTHER_CONST + X))
# tree, which can be optimized to ((CONST + OTHER_CONST) + X)
op = opcall.func_shortname
my_const = opcall.args[0].expr
other_binop = opcall.args[1].expr
folded = None
if isinstance(other_binop.expr, irast.BaseConstant):
my_const, other_binop = other_binop, my_const
if (isinstance(my_const.expr, irast.BaseConstant)
and isinstance(other_binop.expr, irast.OperatorCall)
and other_binop.expr.func_shortname == op
and other_binop.expr.operator_kind is ft.OperatorKind.INFIX):
other_const = other_binop.expr.args[0].expr
other_binop_node = other_binop.expr.args[1].expr
if isinstance(other_binop_node.expr, irast.BaseConstant):
other_binop_node, other_const = \
other_const, other_binop_node
if isinstance(other_const.expr, irast.BaseConstant):
try:
new_const = ireval.evaluate(
irast.OperatorCall(
args=[
irast.CallArg(expr=other_const, ),
irast.CallArg(expr=my_const, ),
],
func_module_id=opcall.func_module_id,
func_shortname=op,
func_polymorphic=opcall.func_polymorphic,
func_sql_function=opcall.func_sql_function,
sql_operator=opcall.sql_operator,
force_return_cast=opcall.force_return_cast,
operator_kind=opcall.operator_kind,
params_typemods=opcall.params_typemods,
context=opcall.context,
typeref=opcall.typeref,
typemod=opcall.typemod,
),
schema=ctx.env.schema,
)
except ireval.UnsupportedExpressionError:
pass
else:
folded_binop = irast.OperatorCall(
args=[
irast.CallArg(expr=setgen.ensure_set(new_const,
ctx=ctx), ),
irast.CallArg(expr=other_binop_node, ),
],
func_module_id=opcall.func_module_id,
func_shortname=op,
func_polymorphic=opcall.func_polymorphic,
func_sql_function=opcall.func_sql_function,
sql_operator=opcall.sql_operator,
force_return_cast=opcall.force_return_cast,
operator_kind=opcall.operator_kind,
params_typemods=opcall.params_typemods,
context=opcall.context,
typeref=opcall.typeref,
typemod=opcall.typemod,
)
folded = setgen.ensure_set(folded_binop, ctx=ctx)
return folded