def format_error_message(
self,
schema: s_schema.Schema,
) -> str:
errmsg = self.get_errmessage(schema)
subject = self.get_subject(schema)
titleattr = subject.get_annotation(schema, 'std::title')
if not titleattr:
subjname = subject.get_shortname(schema)
subjtitle = subjname.name
else:
subjtitle = titleattr
args = self.get_args(schema)
if args:
from edb.edgeql import parser as qlparser
from edb.edgeql import utils as qlutils
args_ql: List[qlast.Base] = [
qlast.Path(steps=[qlast.ObjectRef(name=subjtitle)]),
]
args_ql.extend(qlparser.parse(arg.text) for arg in args)
constr_base: Constraint = schema.get(self.get_name(schema),
type=type(self))
index_parameters = qlutils.index_parameters(
args_ql,
parameters=constr_base.get_params(schema),
schema=schema,
)
expr = constr_base.get_field_value(schema, 'expr')
expr_ql = qlparser.parse(expr.text)
qlutils.inline_parameters(expr_ql, index_parameters)
args_map = {
name: edgeql.generate_source(val, pretty=False)
for name, val in index_parameters.items()
}
else:
args_map = {'__subject__': subjtitle}
assert errmsg is not None
formatted = errmsg.format(**args_map)
return formatted
def declare_view_from_schema(
viewcls: s_obj.Object, *,
ctx: context.ContextLevel) -> irast.Set:
vc = ctx.env.schema_view_cache.get(viewcls)
if vc is not None:
return vc
with ctx.detached() as subctx:
subctx.expr_exposed = False
view_expr = qlparser.parse(viewcls.get_expr(ctx.env.schema).text)
viewcls_name = viewcls.get_name(ctx.env.schema)
view_set = declare_view(view_expr, alias=viewcls_name,
fully_detached=True, ctx=subctx)
# The view path id _itself_ should not be in the nested namespace.
view_set.path_id = view_set.path_id.replace_namespace(
ctx.path_id_namespace)
vc = subctx.aliased_views[viewcls_name]
ctx.env.schema_view_cache[viewcls] = vc
ctx.source_map.update(subctx.source_map)
ctx.aliased_views[viewcls_name] = subctx.aliased_views[viewcls_name]
ctx.view_nodes[vc.get_name(ctx.env.schema)] = vc
ctx.view_sets[vc] = subctx.view_sets[vc]
return vc
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree, self.schema)
expected_cardinality = qltypes.Cardinality(
textwrap.dedent(expected).strip(' \n'))
self.assertEqual(ir.cardinality, expected_cardinality,
'unexpected cardinality:\n' + source)
def trace_Function(
node: qlast.CreateFunction,
*,
ctx: DepTraceContext,
) -> None:
# We also need to add all the signature types as dependencies
# to make sure that DDL linearization of SDL will define the types
# before the function.
deps: List[Dependency] = []
deps.extend(TypeDependency(texpr=param.type) for param in node.params)
deps.append(TypeDependency(texpr=node.returning))
params = {}
for param in node.params:
assert isinstance(param.type, qlast.TypeName)
if not param.type.subtypes:
param_t = ctx.get_ref_name(param.type.maintype)
params[param.name] = param_t
else:
params[param.name] = s_name.QualName('std', 'BaseObject')
if node.nativecode is not None:
deps.append(FunctionDependency(expr=node.nativecode, params=params))
elif (node.code is not None and node.code.language is qlast.Language.EdgeQL
and node.code.code):
# Need to parse the actual code string and use that as the dependency.
fcode = qlparser.parse(node.code.code)
assert isinstance(fcode, qlast.Expr)
deps.append(FunctionDependency(expr=fcode, params=params))
# XXX: hard_dep_expr is used because it ultimately calls the
# _get_hard_deps helper that extracts the proper dependency list
# from types.
_register_item(node, ctx=ctx, hard_dep_exprs=deps)
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree,
self.schema,
options=compiler.CompilerOptions(
apply_query_rewrites=False,
modaliases={None: 'default'},
))
root = ir.scope_tree
if len(root.children) != 1:
self.fail(
f'Scope tree root is expected to have only one child, got'
f' {len(root.children)}'
f' \n{root.pformat()}')
scope_tree = next(iter(root.children))
path_scope = textwrap.indent(scope_tree.pformat(), ' ')
expected_scope = textwrap.indent(
textwrap.dedent(expected).strip(' \n'), ' ')
if path_scope != expected_scope:
diff = '\n'.join(
difflib.context_diff(expected_scope.split('\n'),
path_scope.split('\n')))
self.fail(f'Scope tree does not match the expected result.'
f'\nEXPECTED:\n{expected_scope}\nACTUAL:\n{path_scope}'
f'\nDIFF:\n{diff}')
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree, self.schema)
# The expected cardinality is either given for the whole query
# (by default) or for a specific element of the top-level
# shape. In case of the specific element the name of the shape
# element must be given followed by ":" and then the
# cardinality.
exp = textwrap.dedent(expected).strip(' \n').split(':')
if len(exp) == 1:
field = None
expected_cardinality = qltypes.Cardinality(exp[0])
elif len(exp) == 2:
field = exp[0].strip()
expected_cardinality = qltypes.Cardinality(exp[1].strip())
else:
raise ValueError(
f'unrecognized expected specification: {expected!r}')
if field is not None:
shape = ir.expr.expr.result.shape
for el, _ in shape:
if str(el.path_id.rptr_name()).endswith(field):
card = el.rptr.ptrref.out_cardinality
self.assertEqual(card, expected_cardinality,
'unexpected cardinality:\n' + source)
break
else:
raise AssertionError(f'shape field not found: {field!r}')
else:
self.assertEqual(ir.cardinality, expected_cardinality,
'unexpected cardinality:\n' + source)
def compiled(cls, expr, schema, *,
modaliases=None,
parent_object_type=None,
anchors=None,
path_prefix_anchor=None,
allow_generic_type_output=False,
func_params=None,
singletons=None) -> Expression:
from edb.edgeql import compiler as qlcompiler
qltree = expr.qlast
if qltree is None:
qltree = qlparser.parse(expr.text)
ir = qlcompiler.compile_ast_to_ir(
qltree,
schema=schema,
modaliases=modaliases,
anchors=anchors,
path_prefix_anchor=path_prefix_anchor,
func_params=func_params,
parent_object_type=parent_object_type,
allow_generic_type_output=allow_generic_type_output,
singletons=singletons,
)
return cls(
text=expr.text,
origtext=expr.origtext,
refs=so.ObjectSet.create(schema, ir.schema_refs),
_qlast=qltree,
_irast=ir,
)
def trace_Function(node: qlast.CreateFunction, *, ctx: DepTraceContext):
# We also need to add all the signature types as dependencies
# to make sure that DDL linearization of SDL will define the types
# before the function.
deps = [param.type for param in node.params]
deps.append(node.returning)
params = {}
for param in node.params:
if not param.type.subtypes:
param_t = ctx.get_ref_name(param.type.maintype)
params[param.name] = param_t
else:
params[param.name] = 'std::BaseObject'
if node.nativecode is not None:
deps.append((node.nativecode, params))
elif (node.code is not None and node.code.language is qlast.Language.EdgeQL
and node.code.code):
# Need to parse the actual code string and use that as the dependency.
deps.append((qlparser.parse(node.code.code), params))
# XXX: hard_dep_expr is used because it ultimately calls the
# _get_hard_deps helper that extracts the proper dependency list
# from types.
_register_item(node, ctx=ctx, hard_dep_exprs=deps)
def _create_begin(self, schema, context):
from edb.edgeql import parser as edgeql_parser
from edb.edgeql import utils as edgeql_utils
parent_ctx = context.get(sd.CommandContextToken)
subject = schema.get(parent_ctx.op.classname)
expr = self.get_attribute_value('expr')
if expr.qlast is not None:
tree = expr.qlast
else:
tree = edgeql_parser.parse(expr.text, context.modaliases)
_, _, qlexpr = edgeql_utils.normalize_tree(
tree,
schema,
modaliases=context.modaliases,
anchors={qlast.Subject: subject},
inline_anchors=True,
)
self.set_attribute_value('expr', s_expr.Expression(text=qlexpr))
return sd.CreateObject._create_begin(
self, schema, context)
def ptr_default_to_col_default(schema, ptr, expr):
try:
# NOTE: This code currently will only be invoked for scalars.
# Blindly cast the default expression into the ptr target
# type, validation of the expression type is not the concern
# of this function.
eql = ql_parser.parse(expr.text)
eql = ql_astutils.ensure_qlstmt(
qlast.TypeCast(
type=ql_astutils.type_to_ql_typeref(
ptr.get_target(schema), schema=schema),
expr=eql,
)
)
ir = ql_compiler.compile_ast_to_ir(eql, schema)
except errors.SchemaError:
# Reference errors mean that is is a non-constant default
# referring to a not-yet-existing objects.
return None
if not ir_utils.is_const(ir):
return None
sql_expr = compiler.compile_ir_to_sql_tree(ir, singleton_mode=True)
sql_text = codegen.SQLSourceGenerator.to_source(sql_expr)
return sql_text
def compile_to_ir(expr,
schema,
*,
anchors=None,
path_prefix_anchor=None,
security_context=None,
modaliases=None,
implicit_id_in_shapes=False,
implicit_tid_in_shapes=False):
"""Compile given EdgeQL statement into EdgeDB IR."""
if debug.flags.edgeql_compile:
debug.header('EdgeQL TEXT')
debug.print(expr)
tree = ql_parser.parse(expr, modaliases)
return compile_ast_to_ir(tree,
schema,
anchors=anchors,
path_prefix_anchor=path_prefix_anchor,
security_context=security_context,
modaliases=modaliases,
implicit_id_in_shapes=implicit_id_in_shapes,
implicit_tid_in_shapes=implicit_tid_in_shapes)
def declare_view_from_schema(viewcls: s_types.Type, *,
ctx: context.ContextLevel) -> s_types.Type:
vc = ctx.env.schema_view_cache.get(viewcls)
if vc is not None:
return vc
with ctx.detached() as subctx:
subctx.expr_exposed = False
view_expr = viewcls.get_expr(ctx.env.schema)
assert view_expr is not None
view_ql = qlparser.parse(view_expr.text)
viewcls_name = viewcls.get_name(ctx.env.schema)
assert isinstance(view_ql, qlast.Expr), 'expected qlast.Expr'
view_set = declare_view(view_ql,
alias=viewcls_name,
fully_detached=True,
ctx=subctx)
# The view path id _itself_ should not be in the nested namespace.
view_set.path_id = view_set.path_id.replace_namespace(
ctx.path_id_namespace)
vc = subctx.aliased_views[viewcls_name]
assert vc is not None
ctx.env.schema_view_cache[viewcls] = vc
ctx.source_map.update(subctx.source_map)
ctx.aliased_views[viewcls_name] = subctx.aliased_views[viewcls_name]
ctx.view_nodes[vc.get_name(ctx.env.schema)] = vc
ctx.view_sets[vc] = subctx.view_sets[vc]
return vc
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree, self.schema)
root = ir.scope_tree
if len(root.children) != 1:
self.fail(
f'Scope tree root is expected to have only one child, got'
f' {len(root.children)}'
f' \n{root.pformat()}')
scope_tree = next(iter(root.children))
path_scope = self.UNION_NAME_RE.sub(
'@SID@',
textwrap.indent(scope_tree.pformat(), ' '),
)
expected_scope = textwrap.indent(
textwrap.dedent(expected).strip(' \n'), ' ')
if path_scope != expected_scope:
diff = '\n'.join(
difflib.context_diff(expected_scope.split('\n'),
path_scope.split('\n')))
self.fail(f'Scope tree does not match the expected result.'
f'\nEXPECTED:\n{expected_scope}\nACTUAL:\n{path_scope}'
f'\nDIFF:\n{diff}')
def _compile_to_tree(self, source):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(
qltree,
self.schema,
options=compiler.CompilerOptions(modaliases={None: 'default'}, ),
)
return pg_compiler.compile_ir_to_sql_tree(
ir,
output_format=pg_compiler.OutputFormat.NATIVE,
)
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(
qltree,
self.schema,
options=compiler.CompilerOptions(validate_multiplicity=True))
# The expected multiplicity is given for the whole query.
exp = textwrap.dedent(expected).strip(' \n')
expected_multiplicity = qltypes.Multiplicity(exp)
self.assertEqual(ir.multiplicity, expected_multiplicity,
'unexpected multiplicity:\n' + source)
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(
qltree,
self.schema,
options=compiler.CompilerOptions(
modaliases={None: 'default'},
),
)
expected_volatility = qltypes.Volatility(
textwrap.dedent(expected).strip(' \n'))
self.assertEqual(ir.volatility, expected_volatility,
'unexpected volatility:\n' + source)
def get_access_policy_filters(
self,
schema: s_schema.Schema,
) -> Optional[s_expr.ExpressionList]:
if (self.get_name(schema).module == 'schema' and self.issubclass(
schema, schema.get('schema::Object', type=ObjectType))):
return s_expr.ExpressionList([
s_expr.Expression.from_ast(
qlparser.parse('NOT .internal'),
schema=schema,
modaliases={},
)
])
else:
return None
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree,
self.schema,
options=compiler.CompilerOptions(
apply_query_rewrites=False,
modaliases={None: 'default'},
))
root = ir.scope_tree
if len(root.children) != 1:
self.fail(
f'Scope tree root is expected to have only one child, got'
f' {len(root.children)}'
f' \n{root.pformat()}')
def _normalize_constraint_expr(cls, schema, module_aliases, expr, subject):
from edb.edgeql import compiler as qlcompiler
from edb.edgeql import parser as qlparser
if isinstance(expr, str):
qltree = qlparser.parse(expr, module_aliases)
else:
qltree = expr
ir = qlcompiler.compile_ast_to_ir(
qltree,
schema,
modaliases=module_aliases,
anchors={qlast.Subject: subject},
)
return qltree, ir
def declare_view_from_schema(viewcls: s_types.Type, *,
ctx: context.ContextLevel) -> s_types.Type:
vc = ctx.env.schema_view_cache.get(viewcls)
if vc is not None:
return vc
with ctx.detached() as subctx:
subctx.expr_exposed = False
view_expr = viewcls.get_expr(ctx.env.schema)
assert view_expr is not None
view_ql = qlparser.parse(view_expr.text)
viewcls_name = viewcls.get_name(ctx.env.schema)
assert isinstance(view_ql, qlast.Expr), 'expected qlast.Expr'
view_set = declare_view(view_ql,
alias=viewcls_name,
fully_detached=True,
ctx=subctx)
# The view path id _itself_ should not be in the nested namespace.
view_set.path_id = view_set.path_id.replace_namespace(
ctx.path_id_namespace)
vc = subctx.aliased_views[viewcls_name]
assert vc is not None
if not ctx.in_temp_scope:
ctx.env.schema_view_cache[viewcls] = vc
ctx.source_map.update(subctx.source_map)
ctx.aliased_views[viewcls_name] = subctx.aliased_views[viewcls_name]
ctx.view_nodes[vc.get_name(ctx.env.schema)] = vc
ctx.view_sets[vc] = subctx.view_sets[vc]
# XXX: The current cardinality inference machine does not look
# into unreferenced expression parts, which includes computables
# that may be declared on an alias that another alias is referencing,
# leaving Unknown cardinalities in place. To fix this, copy
# cardinalities for computed pointers from the alias object in the
# schema.
view_type = setgen.get_set_type(view_set, ctx=subctx)
if isinstance(view_type, s_objtypes.ObjectType):
assert isinstance(viewcls, s_objtypes.ObjectType)
_fixup_cardinalities(
view_type,
viewcls,
ctx=ctx,
)
return vc
def run_test(self, *, source, spec, expected):
qltree = qlparser.parse(source)
ir = compiler.compile_ast_to_ir(qltree, self.schema)
path_scope = self.UUID_RE.sub(
'@SID@',
textwrap.indent(ir.scope_tree.pformat(), ' '),
)
expected_scope = textwrap.indent(
textwrap.dedent(expected).strip(' \n'), ' ')
if path_scope != expected_scope:
diff = '\n'.join(difflib.context_diff(
expected_scope.split('\n'), path_scope.split('\n')))
self.fail(
f'Scope tree does not match the expected result.'
f'\nEXPECTED:\n{expected_scope}\nACTUAL:\n{path_scope}'
f'\nDIFF:\n{diff}')
def _cmd_tree_from_ast(
cls,
schema: s_schema.Schema,
astnode: qlast.DDLOperation,
context: sd.CommandContext,
) -> sd.Command:
cmd = super()._cmd_tree_from_ast(schema, astnode, context)
assert isinstance(astnode, qlast.CreateFunction)
if astnode.code is not None:
cmd.set_attribute_value(
'language',
astnode.code.language,
)
if astnode.code.language is qlast.Language.EdgeQL:
if astnode.nativecode is not None:
nativecode_expr = astnode.nativecode
else:
nativecode_expr = qlparser.parse(astnode.code.code)
nativecode = expr.Expression.from_ast(
nativecode_expr,
schema,
context.modaliases,
)
cmd.set_attribute_value(
'nativecode',
nativecode,
)
elif astnode.code.from_function is not None:
cmd.set_attribute_value(
'from_function',
astnode.code.from_function
)
else:
cmd.set_attribute_value(
'code',
astnode.code.code,
)
return cmd
def _cmd_tree_from_ast(
cls,
schema: s_schema.Schema,
astnode: qlast.DDLOperation,
context: sd.CommandContext,
) -> sd.Command:
cmd = super()._cmd_tree_from_ast(schema, astnode, context)
assert isinstance(astnode, qlast.AlterFunction)
if astnode.code is not None:
if (
astnode.code.language is not qlast.Language.EdgeQL or
astnode.code.from_function is not None or
astnode.code.from_expr
):
raise errors.EdgeQLSyntaxError(
'altering function code is only supported for '
'pure EdgeQL functions',
context=astnode.context
)
nativecode_expr: Optional[qlast.Expr] = None
if astnode.nativecode is not None:
nativecode_expr = astnode.nativecode
elif astnode.code.code is not None:
nativecode_expr = qlparser.parse(astnode.code.code)
if nativecode_expr is not None:
nativecode = expr.Expression.from_ast(
nativecode_expr,
schema,
context.modaliases,
)
cmd.set_attribute_value(
'nativecode',
nativecode,
)
return cmd
def _assert_normalize_expr(self,
text,
expected,
expected_const_type=None,
*,
anchors=None,
inline_anchors=False):
edgeql_tree = eql_parser.parse(text)
schema = self.__class__.schema
ir, _, normalized = eql_utils.normalize_tree(
edgeql_tree,
schema,
anchors=anchors,
inline_anchors=inline_anchors)
self.assertEqual(
textwrap.dedent(normalized).strip(),
textwrap.dedent(expected).strip())
if expected_const_type is not None:
self.assertEqual(
schema.get_by_id(ir.expr.typeref.id).get_displayname(schema),
expected_const_type)
def _normalize_constraint_expr(cls,
schema,
module_aliases,
expr,
subject,
*,
inline_anchors=False):
from edb.edgeql import parser as edgeql_parser
from edb.edgeql import utils as edgeql_utils
if isinstance(expr, str):
tree = edgeql_parser.parse(expr, module_aliases)
else:
tree = expr
ir, edgeql_tree, _ = edgeql_utils.normalize_tree(
tree,
schema,
modaliases=module_aliases,
anchors={qlast.Subject: subject},
inline_anchors=inline_anchors)
return edgeql_tree.result, ir
def _populate_concrete_constraint_attrs(
self,
schema: s_schema.Schema,
subject_obj: Optional[so.Object],
*,
name: str,
subjectexpr: Optional[s_expr.Expression] = None,
sourcectx: Optional[c_parsing.ParserContext] = None,
args: Any = None,
**kwargs: Any) -> None:
from edb.ir import ast as ir_ast
from edb.ir import utils as ir_utils
constr_base = schema.get(name, type=Constraint)
orig_subjectexpr = subjectexpr
orig_subject = subject_obj
base_subjectexpr = constr_base.get_field_value(schema, 'subjectexpr')
if subjectexpr is None:
subjectexpr = base_subjectexpr
elif (base_subjectexpr is not None
and subjectexpr.text != base_subjectexpr.text):
raise errors.InvalidConstraintDefinitionError(
f'subjectexpr is already defined for {name!r}')
if (isinstance(subject_obj, s_scalars.ScalarType)
and constr_base.get_is_aggregate(schema)):
raise errors.InvalidConstraintDefinitionError(
f'{constr_base.get_verbosename(schema)} may not '
f'be used on scalar types')
if subjectexpr is not None:
subject_ql = subjectexpr.qlast
subject = subject_ql
else:
subject = subject_obj
expr: s_expr.Expression = constr_base.get_field_value(schema, 'expr')
if not expr:
raise errors.InvalidConstraintDefinitionError(
f'missing constraint expression in {name!r}')
# Re-parse instead of using expr.qlast, because we mutate
# the AST below.
expr_ql = qlparser.parse(expr.text)
if not args:
args = constr_base.get_field_value(schema, 'args')
attrs = dict(kwargs)
inherited = dict()
if orig_subjectexpr is not None:
attrs['subjectexpr'] = orig_subjectexpr
else:
base_subjectexpr = constr_base.get_subjectexpr(schema)
if base_subjectexpr is not None:
attrs['subjectexpr'] = base_subjectexpr
inherited['subjectexpr'] = True
errmessage = attrs.get('errmessage')
if not errmessage:
errmessage = constr_base.get_errmessage(schema)
inherited['errmessage'] = True
attrs['errmessage'] = errmessage
if subject is not orig_subject:
# subject has been redefined
assert isinstance(subject, qlast.Base)
qlutils.inline_anchors(expr_ql,
anchors={qlast.Subject().name: subject})
subject = orig_subject
if args:
args_ql: List[qlast.Base] = [
qlast.Path(steps=[qlast.Subject()]),
]
args_ql.extend(arg.qlast for arg in args)
args_map = qlutils.index_parameters(
args_ql,
parameters=constr_base.get_params(schema),
schema=schema,
)
qlutils.inline_parameters(expr_ql, args_map)
attrs['args'] = args
if expr == '__subject__':
expr_context = sourcectx
else:
expr_context = None
assert subject is not None
final_expr = s_expr.Expression.compiled(
s_expr.Expression.from_ast(expr_ql, schema, {}),
schema=schema,
options=qlcompiler.CompilerOptions(
anchors={qlast.Subject().name: subject}, ),
)
bool_t: s_scalars.ScalarType = schema.get('std::bool')
assert isinstance(final_expr.irast, ir_ast.Statement)
expr_type = final_expr.irast.stype
if not expr_type.issubclass(schema, bool_t):
raise errors.InvalidConstraintDefinitionError(
f'{name} constraint expression expected '
f'to return a bool value, got '
f'{expr_type.get_verbosename(schema)}',
context=expr_context)
if (subjectexpr is not None and isinstance(subject_obj, s_types.Type)
and subject_obj.is_object_type()):
final_subjectexpr = s_expr.Expression.compiled(
subjectexpr,
schema=schema,
options=qlcompiler.CompilerOptions(
anchors={qlast.Subject().name: subject},
singletons=frozenset({subject_obj}),
),
)
assert isinstance(final_subjectexpr.irast, ir_ast.Statement)
if final_subjectexpr.irast.cardinality.is_multi():
refs = ir_utils.get_longest_paths(final_expr.irast)
if len(refs) > 1:
raise errors.InvalidConstraintDefinitionError(
"Constraint with multi cardinality may not "
"reference multiple links or properties",
context=expr_context)
attrs['return_type'] = constr_base.get_return_type(schema)
attrs['return_typemod'] = constr_base.get_return_typemod(schema)
attrs['finalexpr'] = final_expr
attrs['params'] = constr_base.get_params(schema)
attrs['is_abstract'] = False
for k, v in attrs.items():
self.set_attribute_value(k, v, inherited=bool(inherited.get(k)))
def computable_ptr_set(
rptr: irast.Pointer,
*,
unnest_fence: bool = False,
same_computable_scope: bool = False,
srcctx: Optional[parsing.ParserContext] = None,
ctx: context.ContextLevel,
) -> irast.Set:
"""Return ir.Set for a pointer defined as a computable."""
ptrcls = typegen.ptrcls_from_ptrref(rptr.ptrref, ctx=ctx)
source_set = rptr.source
source_scls = get_set_type(source_set, ctx=ctx)
# process_view() may generate computable pointer expressions
# in the form "self.linkname". To prevent infinite recursion,
# self must resolve to the parent type of the view NOT the view
# type itself. Similarly, when resolving computable link properties
# make sure that we use the parent of derived ptrcls.
if source_scls.is_view(ctx.env.schema):
source_set_stype = source_scls.peel_view(ctx.env.schema)
source_set = new_set_from_set(source_set,
stype=source_set_stype,
preserve_scope_ns=True,
ctx=ctx)
source_set.shape = []
if source_set.rptr is not None:
source_rptrref = source_set.rptr.ptrref
if source_rptrref.base_ptr is not None:
source_rptrref = source_rptrref.base_ptr
source_set.rptr = irast.Pointer(
source=source_set.rptr.source,
target=source_set,
ptrref=source_rptrref,
direction=source_set.rptr.direction,
)
qlctx: Optional[context.ContextLevel]
inner_source_path_id: Optional[irast.PathId]
try:
comp_info = ctx.source_map[ptrcls]
qlexpr = comp_info.qlexpr
assert isinstance(comp_info.context, context.ContextLevel)
qlctx = comp_info.context
inner_source_path_id = comp_info.path_id
path_id_ns = comp_info.path_id_ns
except KeyError:
comp_expr = ptrcls.get_expr(ctx.env.schema)
schema_qlexpr: Optional[qlast.Expr] = None
if comp_expr is None and ctx.env.options.apply_query_rewrites:
schema_deflt = ptrcls.get_schema_reflection_default(ctx.env.schema)
if schema_deflt is not None:
assert isinstance(ptrcls, s_pointers.Pointer)
ptrcls_n = ptrcls.get_shortname(ctx.env.schema).name
schema_qlexpr = qlast.BinOp(
left=qlast.Path(steps=[
qlast.Source(),
qlast.Ptr(
ptr=qlast.ObjectRef(name=ptrcls_n),
direction=s_pointers.PointerDirection.Outbound,
type=('property' if ptrcls.is_link_property(
ctx.env.schema) else None))
], ),
right=qlparser.parse_fragment(schema_deflt),
op='??',
)
if schema_qlexpr is None:
if comp_expr is None:
ptrcls_sn = ptrcls.get_shortname(ctx.env.schema)
raise errors.InternalServerError(
f'{ptrcls_sn!r} is not a computable pointer')
comp_qlexpr = qlparser.parse(comp_expr.text)
assert isinstance(comp_qlexpr, qlast.Expr), 'expected qlast.Expr'
schema_qlexpr = comp_qlexpr
# NOTE: Validation of the expression type is not the concern
# of this function. For any non-object pointer target type,
# the default expression must be assignment-cast into that
# type.
target_scls = ptrcls.get_target(ctx.env.schema)
assert target_scls is not None
if not target_scls.is_object_type():
schema_qlexpr = qlast.TypeCast(
type=typegen.type_to_ql_typeref(target_scls, ctx=ctx),
expr=schema_qlexpr,
)
qlexpr = astutils.ensure_qlstmt(schema_qlexpr)
qlctx = None
inner_source_path_id = None
path_id_ns = None
newctx: Callable[[], ContextManager[context.ContextLevel]]
if qlctx is None:
# Schema-level computable, completely detached context
newctx = ctx.detached
else:
newctx = _get_computable_ctx(rptr=rptr,
source=source_set,
source_scls=source_scls,
inner_source_path_id=inner_source_path_id,
path_id_ns=path_id_ns,
same_scope=same_computable_scope,
qlctx=qlctx,
ctx=ctx)
if ptrcls.is_link_property(ctx.env.schema):
source_path_id = rptr.source.path_id.ptr_path()
else:
src_path = rptr.target.path_id.src_path()
assert src_path is not None
source_path_id = src_path
result_path_id = pathctx.extend_path_id(
source_path_id,
ptrcls=ptrcls,
ns=ctx.path_id_namespace,
ctx=ctx,
)
result_stype = ptrcls.get_target(ctx.env.schema)
base_object = ctx.env.schema.get('std::BaseObject', type=s_types.Type)
with newctx() as subctx:
subctx.disable_shadowing.add(ptrcls)
if result_stype != base_object:
subctx.view_scls = result_stype
subctx.view_rptr = context.ViewRPtr(source_scls,
ptrcls=ptrcls,
rptr=rptr) # type: ignore
subctx.anchors[qlast.Source().name] = source_set
subctx.empty_result_type_hint = ptrcls.get_target(ctx.env.schema)
subctx.partial_path_prefix = source_set
# On a mutation, make the expr_exposed. This corresponds with
# a similar check on is_mutation in _normalize_view_ptr_expr.
if (source_scls.get_expr_type(ctx.env.schema) !=
s_types.ExprType.Select):
subctx.expr_exposed = True
if isinstance(qlexpr, qlast.Statement):
subctx.stmt_metadata[qlexpr] = context.StatementMetadata(
is_unnest_fence=unnest_fence,
iterator_target=True,
)
comp_ir_set = ensure_set(dispatch.compile(qlexpr, ctx=subctx),
ctx=subctx)
comp_ir_set = new_set_from_set(comp_ir_set,
path_id=result_path_id,
rptr=rptr,
context=srcctx,
ctx=ctx)
rptr.target = comp_ir_set
return comp_ir_set
def get_concrete_constraint_attrs(
cls, schema, subject, *, name, subjectexpr=None,
sourcectx=None, args=[], modaliases=None, **kwargs):
from edb.edgeql import parser as qlparser
from edb.edgeql import utils as qlutils
constr_base = schema.get(name, module_aliases=modaliases)
module_aliases = {}
orig_subjectexpr = subjectexpr
orig_subject = subject
base_subjectexpr = constr_base.get_field_value(schema, 'subjectexpr')
if subjectexpr is None:
subjectexpr = base_subjectexpr
elif (base_subjectexpr is not None
and subjectexpr.text != base_subjectexpr.text):
raise errors.InvalidConstraintDefinitionError(
'subjectexpr is already defined for ' +
f'{str(name)!r}')
if subjectexpr is not None:
subject_ql = subjectexpr.qlast
if subject_ql is None:
subject_ql = qlparser.parse(subjectexpr.text, module_aliases)
subject = subject_ql
expr: s_expr.Expression = constr_base.get_field_value(schema, 'expr')
if not expr:
raise errors.InvalidConstraintDefinitionError(
f'missing constraint expression in {name!r}')
expr_ql = qlparser.parse(expr.text, module_aliases)
if not args:
args = constr_base.get_field_value(schema, 'args')
attrs = dict(kwargs)
inherited = dict()
if orig_subjectexpr is not None:
attrs['subjectexpr'] = orig_subjectexpr
else:
base_subjectexpr = constr_base.get_subjectexpr(schema)
if base_subjectexpr is not None:
attrs['subjectexpr'] = base_subjectexpr
errmessage = attrs.get('errmessage')
if not errmessage:
errmessage = constr_base.get_errmessage(schema)
inherited['errmessage'] = True
attrs['errmessage'] = errmessage
if subject is not orig_subject:
# subject has been redefined
qlutils.inline_anchors(expr_ql, anchors={qlast.Subject: subject})
subject = orig_subject
args_map = None
if args:
args_ql = [
qlast.Path(steps=[qlast.Subject()]),
]
args_ql.extend(
qlparser.parse(arg.text, module_aliases) for arg in args
)
args_map = qlutils.index_parameters(
args_ql,
parameters=constr_base.get_params(schema),
schema=schema)
qlutils.inline_parameters(expr_ql, args_map)
args_map = {name: edgeql.generate_source(val, pretty=False)
for name, val in args_map.items()}
args_map['__subject__'] = '{__subject__}'
attrs['errmessage'] = attrs['errmessage'].format(**args_map)
inherited.pop('errmessage', None)
attrs['args'] = args
if expr == '__subject__':
expr_context = sourcectx
else:
expr_context = None
final_expr = s_expr.Expression.compiled(
s_expr.Expression.from_ast(expr_ql, schema, module_aliases),
schema=schema,
modaliases=module_aliases,
anchors={qlast.Subject: subject},
)
bool_t = schema.get('std::bool')
expr_type = final_expr.irast.stype
if not expr_type.issubclass(schema, bool_t):
raise errors.InvalidConstraintDefinitionError(
f'{name} constraint expression expected '
f'to return a bool value, got '
f'{expr_type.get_name(schema).name!r}',
context=expr_context
)
attrs['return_type'] = constr_base.get_return_type(schema)
attrs['return_typemod'] = constr_base.get_return_typemod(schema)
attrs['finalexpr'] = final_expr
attrs['params'] = constr_base.get_params(schema)
return constr_base, attrs, inherited
def _populate_concrete_constraint_attrs(
self,
schema: s_schema.Schema,
context: sd.CommandContext,
subject_obj: Optional[so.Object],
*,
name: sn.QualName,
subjectexpr: Optional[s_expr.Expression] = None,
sourcectx: Optional[c_parsing.ParserContext] = None,
args: Any = None,
**kwargs: Any) -> None:
from edb.ir import ast as ir_ast
from edb.ir import utils as ir_utils
constr_base = schema.get(name, type=Constraint)
orig_subjectexpr = subjectexpr
orig_subject = subject_obj
base_subjectexpr = constr_base.get_field_value(schema, 'subjectexpr')
if subjectexpr is None:
subjectexpr = base_subjectexpr
elif (base_subjectexpr is not None
and subjectexpr.text != base_subjectexpr.text):
raise errors.InvalidConstraintDefinitionError(
f'subjectexpr is already defined for {name}')
if (isinstance(subject_obj, s_scalars.ScalarType)
and constr_base.get_is_aggregate(schema)):
raise errors.InvalidConstraintDefinitionError(
f'{constr_base.get_verbosename(schema)} may not '
f'be used on scalar types')
if subjectexpr is not None:
subject_ql = subjectexpr.qlast
subject = subject_ql
else:
subject = subject_obj
expr: s_expr.Expression = constr_base.get_field_value(schema, 'expr')
if not expr:
raise errors.InvalidConstraintDefinitionError(
f'missing constraint expression in {name}')
# Re-parse instead of using expr.qlast, because we mutate
# the AST below.
expr_ql = qlparser.parse(expr.text)
if not args:
args = constr_base.get_field_value(schema, 'args')
attrs = dict(kwargs)
inherited = dict()
if orig_subjectexpr is not None:
attrs['subjectexpr'] = orig_subjectexpr
else:
base_subjectexpr = constr_base.get_subjectexpr(schema)
if base_subjectexpr is not None:
attrs['subjectexpr'] = base_subjectexpr
inherited['subjectexpr'] = True
errmessage = attrs.get('errmessage')
if not errmessage:
errmessage = constr_base.get_errmessage(schema)
inherited['errmessage'] = True
attrs['errmessage'] = errmessage
if subject is not orig_subject:
# subject has been redefined
assert isinstance(subject, qlast.Base)
qlutils.inline_anchors(expr_ql,
anchors={qlast.Subject().name: subject})
subject = orig_subject
if args:
args_ql: List[qlast.Base] = [
qlast.Path(steps=[qlast.Subject()]),
]
args_ql.extend(arg.qlast for arg in args)
args_map = qlutils.index_parameters(
args_ql,
parameters=constr_base.get_params(schema),
schema=schema,
)
qlutils.inline_parameters(expr_ql, args_map)
attrs['args'] = args
assert subject is not None
path_prefix_anchor = (qlast.Subject().name if isinstance(
subject, s_types.Type) else None)
final_expr = s_expr.Expression.compiled(
s_expr.Expression.from_ast(expr_ql, schema, {}),
schema=schema,
options=qlcompiler.CompilerOptions(
anchors={qlast.Subject().name: subject},
path_prefix_anchor=path_prefix_anchor,
apply_query_rewrites=not context.stdmode,
),
)
bool_t = schema.get('std::bool', type=s_scalars.ScalarType)
assert isinstance(final_expr.irast, ir_ast.Statement)
expr_type = final_expr.irast.stype
if not expr_type.issubclass(schema, bool_t):
raise errors.InvalidConstraintDefinitionError(
f'{name} constraint expression expected '
f'to return a bool value, got '
f'{expr_type.get_verbosename(schema)}',
context=sourcectx)
if subjectexpr is not None:
if (isinstance(subject_obj, s_types.Type)
and subject_obj.is_object_type()):
singletons = frozenset({subject_obj})
else:
singletons = frozenset()
final_subjectexpr = s_expr.Expression.compiled(
subjectexpr,
schema=schema,
options=qlcompiler.CompilerOptions(
anchors={qlast.Subject().name: subject},
path_prefix_anchor=path_prefix_anchor,
singletons=singletons,
apply_query_rewrites=not context.stdmode,
),
)
assert isinstance(final_subjectexpr.irast, ir_ast.Statement)
refs = ir_utils.get_longest_paths(final_expr.irast)
has_multi = False
for ref in refs:
while ref.rptr:
rptr = ref.rptr
if rptr.ptrref.dir_cardinality.is_multi():
has_multi = True
if (not isinstance(rptr.ptrref,
ir_ast.TupleIndirectionPointerRef)
and rptr.ptrref.source_ptr is None
and rptr.source.rptr is not None):
raise errors.InvalidConstraintDefinitionError(
"constraints cannot contain paths with more "
"than one hop",
context=sourcectx)
ref = rptr.source
if has_multi and len(refs) > 1:
raise errors.InvalidConstraintDefinitionError(
"cannot reference multiple links or properties in a "
"constraint where at least one link or property is MULTI",
context=sourcectx)
if has_multi and ir_utils.contains_set_of_op(
final_subjectexpr.irast):
raise errors.InvalidConstraintDefinitionError(
"cannot use aggregate functions or operators "
"in a non-aggregating constraint",
context=sourcectx)
attrs['return_type'] = constr_base.get_return_type(schema)
attrs['return_typemod'] = constr_base.get_return_typemod(schema)
attrs['finalexpr'] = final_expr
attrs['params'] = constr_base.get_params(schema)
attrs['abstract'] = False
for k, v in attrs.items():
self.set_attribute_value(k, v, inherited=bool(inherited.get(k)))
def computable_ptr_set(rptr: irast.Pointer,
*,
unnest_fence: bool = False,
same_computable_scope: bool = False,
ctx: context.ContextLevel) -> irast.Set:
"""Return ir.Set for a pointer defined as a computable."""
ptrcls = irtyputils.ptrcls_from_ptrref(rptr.ptrref, schema=ctx.env.schema)
source_set = rptr.source
source_scls = get_set_type(source_set, ctx=ctx)
# process_view() may generate computable pointer expressions
# in the form "self.linkname". To prevent infinite recursion,
# self must resolve to the parent type of the view NOT the view
# type itself. Similarly, when resolving computable link properties
# make sure that we use ptrcls.derived_from.
if source_scls.is_view(ctx.env.schema):
source_set_stype = source_scls.peel_view(ctx.env.schema)
source_set = new_set_from_set(source_set,
stype=source_set_stype,
preserve_scope_ns=True,
ctx=ctx)
source_set.shape = []
if source_set.rptr is not None:
schema = ctx.env.schema
source_rptrref = source_set.rptr.ptrref
source_rptrcls = irtyputils.ptrcls_from_ptrref(source_rptrref,
schema=schema)
derived_from = source_rptrcls.get_derived_from(schema)
if (derived_from is not None and not derived_from.generic(schema)
and derived_from.get_derived_from(schema) is not None
and ptrcls.is_link_property(schema)):
source_set.rptr.ptrref = irtyputils.ptrref_from_ptrcls(
source_ref=source_rptrref.dir_source,
target_ref=source_rptrref.dir_target,
direction=source_rptrref.direction,
parent_ptr=source_rptrref.parent_ptr,
ptrcls=derived_from,
schema=schema,
)
stmtctx.ensure_ptrref_cardinality(derived_from,
source_set.rptr.ptrref,
ctx=ctx)
try:
qlexpr, qlctx, inner_source_path_id, path_id_ns = \
ctx.source_map[ptrcls]
except KeyError:
ptrcls_default = ptrcls.get_default(ctx.env.schema)
if not ptrcls_default:
ptrcls_sn = ptrcls.get_shortname(ctx.env.schema)
raise ValueError(f'{ptrcls_sn!r} is not a computable pointer')
qlexpr = astutils.ensure_qlstmt(qlparser.parse(ptrcls_default.text))
qlctx = None
inner_source_path_id = None
path_id_ns = None
if qlctx is None:
# Schema-level computable, completely detached context
newctx = ctx.detached
else:
newctx = _get_computable_ctx(rptr=rptr,
source=source_set,
source_scls=source_scls,
inner_source_path_id=inner_source_path_id,
path_id_ns=path_id_ns,
same_scope=same_computable_scope,
qlctx=qlctx,
ctx=ctx)
if ptrcls.is_link_property(ctx.env.schema):
source_path_id = rptr.source.path_id.ptr_path()
else:
source_path_id = rptr.target.path_id.src_path()
result_stype = ptrcls.get_target(ctx.env.schema)
result_path_id = pathctx.extend_path_id(
source_path_id,
ptrcls=ptrcls,
direction=s_pointers.PointerDirection.Outbound,
target=result_stype,
ns=ctx.path_id_namespace,
ctx=ctx)
with newctx() as subctx:
subctx.view_scls = result_stype
subctx.view_rptr = context.ViewRPtr(source_scls,
ptrcls=ptrcls,
rptr=rptr)
subctx.anchors[qlast.Source] = source_set
subctx.empty_result_type_hint = ptrcls.get_target(ctx.env.schema)
subctx.partial_path_prefix = source_set
if isinstance(qlexpr, qlast.Statement) and unnest_fence:
subctx.stmt_metadata[qlexpr] = context.StatementMetadata(
is_unnest_fence=True)
comp_ir_set = dispatch.compile(qlexpr, ctx=subctx)
comp_ir_set_copy = new_set_from_set(comp_ir_set, ctx=ctx)
pending_cardinality = ctx.pending_cardinality.get(ptrcls)
if pending_cardinality is not None and not pending_cardinality.from_parent:
stmtctx.get_pointer_cardinality_later(
ptrcls=ptrcls,
irexpr=comp_ir_set_copy,
specified_card=pending_cardinality.specified_cardinality,
source_ctx=pending_cardinality.source_ctx,
ctx=ctx)
def _check_cardinality(ctx):
if ptrcls.singular(ctx.env.schema):
stmtctx.enforce_singleton_now(comp_ir_set_copy, ctx=ctx)
stmtctx.at_stmt_fini(_check_cardinality, ctx=ctx)
comp_ir_set = new_set_from_set(comp_ir_set,
path_id=result_path_id,
rptr=rptr,
ctx=ctx)
rptr.target = comp_ir_set
return comp_ir_set
