def serialize_project(node, context):
return IR.select(
node.kind_name,
filters=IR.filter(
IR.attribute(None, "name"), IR.literal(node.name), "="
),
limit=1,
)
def compile_constant(node, state):
expr = IR.literal(node.value)
# Constants are represented as repr(obj) in the
# serialization part, so we have to re-cast it.
if state.match == "Constant":
expr.value = repr(expr.value)
return IR.filter(state.compute_path(), expr, "=")
def compile_sequence(node, state):
total_length = len(node.items)
verify_call = IR.call("count", [state.compute_path()])
length_verifier = IR.filter(verify_call, total_length, "=")
if total := node.items.count(grammar.Expand):
state.ensure(node, total == 1)
length_verifier = IR.filter(verify_call, total_length - 1, ">=")
def apply_ast(node, context):
with context.enter_node(node):
insertions = {
field: serialize(value, context)
for field, value in iter_properties(node)
if value is not None
}
query = IR.insert(node.kind_name, insertions)
return context.connection.query_one(IR.construct(query))
def serialize_ast(node, context):
if node.is_enum:
# <ast::op>'Add'
return IR.enum_member(node.base_name, node.kind_name)
else:
# (INSERT ast::BinOp {.left := ..., ...})
reference = apply_ast(node, context)
context.new_reference(reference.id)
# (SELECT ast::expr FILTER .id = ... LIMIT 1)
return IR.select(
node.base_name, filters=IR.object_ref(reference), limit=1
)
def metadata_parent(parent_node, state):
state.ensure(parent_node, len(parent_node.filters) == 1)
parent_field, filter_value = parent_node.filters.popitem()
state.ensure(parent_node, filter_value is grammar.Ignore)
with state.temp_pointer("_parent_types"):
return IR.filter(
IR.tuple(
[parent_node.bound_node.type_id,
IR.literal(parent_field)]),
state.compute_path(),
"IN",
)
def compile_reference(node, state):
obtained_type = state.field_info.type
if pointer := state.scope.lookup(node.name):
expected_type = pointer.field_info.type
state.ensure(node, expected_type is obtained_type)
left = state.compute_path()
right = pointer.compute_path()
if issubclass(expected_type, ast.expr):
left = IR.attribute(left, "_tag")
right = IR.attribute(right, "_tag")
return IR.filter(left, right, "=")
def convert_meta(node, state, arguments):
state.ensure(node, state.pointer == "__metadata__")
filters = None
if arguments.parent:
filters = IR.combine_filters(filters,
metadata_parent(arguments.parent, state))
return filters
def aggregate_array(state):
# If we are in a nested list search (e.g: Call(args=[Call(args=[Name()])]))
# we can't directly use `ORDER BY @index` since the EdgeDB can't quite infer
# which @index are we talking about.
if len(state.parents) >= 1:
path = IR.attribute(
IR.typed(IR.name(_COMPILER_WORKAROUND_FOR_TARGET), state.match),
state.pointer,
)
body = IR.loop(
IR.name(_COMPILER_WORKAROUND_FOR_TARGET),
state.parents[-1].compute_path(allow_missing=True),
IR.select(path, order=IR.property("index")),
)
else:
body = IR.select(state.compute_path(), order=IR.property("index"))
return IR.call("array_agg", [body])
def compute_path(self, allow_missing=False):
parent, *parents = self.get_ordered_parents()
def get_pointer(state, allow_missing):
pointer = state.pointer
if allow_missing:
pointer = IR.optional(pointer)
return pointer
base = get_pointer(parent, allow_missing)
if not parent.is_flag_set("in for loop"):
base = IR.attribute(None, base)
for parent in parents:
base = IR.typed(base, parent.match)
base = IR.attribute(base, get_pointer(parent, allow_missing))
return base
def run_query_on_connection(
connection,
reiz_ql,
*,
limit=DEFAULT_LIMIT,
offset=0,
):
query = IR.construct(compile_query(reiz_ql, limit, offset))
query_set = connection.query(query)
return process_queryset(query_set)
def compile_matcher(node, state):
if state is None:
state = CompilerState(node.name)
else:
state = CompilerState.from_parent(node.name, state)
filters = None
for key, value in node.filters.items():
if value is grammar.Ignore:
continue
if right_filter := state.compile(key, value):
filters = IR.combine_filters(filters, right_filter)
async def run_query_on_async_connection(
connection,
reiz_ql,
*,
limit=DEFAULT_LIMIT,
offset=0,
loop=None,
timeout=config.web.timeout,
):
query = IR.construct(compile_query(reiz_ql, limit, offset))
query_set = await asyncio.wait_for(connection.query(query),
timeout=timeout,
loop=loop)
return process_queryset(query_set)
def compile_query(self):
query = compile_query(self.reiz_ql, limit=None, offset=0)
query.filters = IR.combine_filters(
query.filters,
IR.filter(
IR.attribute(IR.attribute(None, "_module"), "filename"),
IR.literal(self.expected_filename),
"=",
),
)
return IR.construct(query)
async def analyze_query(request):
if "query" not in request.json:
return error("Missing 'query' data")
results = dict.fromkeys(("exception", "reiz_ql", "edge_ql"))
try:
reiz_ql = parse_query(request.json["query"])
results["reiz_ql"] = normalize(asdict(reiz_ql))
results["edge_ql"] = IR.construct(compile_to_ir(reiz_ql))
except ReizQLSyntaxError as syntax_err:
results["status"] = "error"
results["exception"] = syntax_err.message
results.update(syntax_err.position)
else:
results["status"] = "success"
return json_response(results)
def main():
parser = ArgumentParser()
parser.add_argument(
"source",
type=FileType(mode="rb"),
nargs="?",
default="-",
help="the file to parse; defaults to stdin",
)
parser.add_argument(
"--do-not-optimize",
action="store_false",
help="do not generated optimized IR",
)
options = parser.parse_args()
with options.source:
query = parse_query(options.source.read())
pprint(query)
ir = compile_to_ir(query)
print(
IR.construct(ir, optimize=options.do_not_optimize, top_level=True))
def convert_length(node, state, arguments):
state.ensure(node, any((arguments.min, arguments.max)))
count = IR.call("count", [state.compute_path()])
filters = None
for value, operator in [
(arguments.min, IR.as_operator(">=")),
(arguments.max, IR.as_operator("<=")),
]:
if value is None:
continue
state.ensure(value, isinstance(value, grammar.Constant))
state.ensure(value, isinstance(value.value, int))
filters = IR.combine_filters(
filters, IR.filter(count, IR.literal(value.value), operator))
assert filters is not None
return filters
def convert_match_enum(node, state):
expr = IR.enum_member(node.base, node.name)
return IR.filter(state.compute_path(), expr, "=")
def convert_all_any(node, state, arguments):
return IR.call(node.name.lower(), [state.codegen(arguments.value)])
def serialize_string(value, context):
return IR.literal(value)
def serialize_tuple(sequence, context):
return IR.tuple([serialize(value, context) for value in sequence])
def serialize_sequence(sequence, context):
ir_set = IR.set([serialize(value, context) for value in sequence])
if all(isinstance(item, _BASIC_SET_TYPES) for item in sequence):
# {1, 2, 3} / {<ast::op>'Add', <ast::op>'Sub', ...}
return ir_set
else:
# Inserting a sequence of AST objects would require special
# attention to calculate the index property.
target = IR.name("item")
scope = IR.namespace({"items": ir_set})
loop = IR.loop(
target,
IR.call("enumerate", [IR.name("items")]),
IR.select(
IR.attribute(target, 1),
selections=[
IR.assign(IR.property("index"), IR.attribute(target, 0))
],
),
)
return IR.add_namespace(scope, loop)
def sync(self, connection):
query_set = connection.query(IR.construct_prepared("module.filenames"))
self.files = {module.filename for module in query_set}
query_set = connection.query(IR.construct_prepared("project.names"))
self.projects = {project.name for project in query_set}
if state is None:
state = CompilerState(node.name)
else:
state = CompilerState.from_parent(node.name, state)
filters = None
for key, value in node.filters.items():
if value is grammar.Ignore:
continue
if right_filter := state.compile(key, value):
filters = IR.combine_filters(filters, right_filter)
if state.is_root:
state.scope.exit()
if state_filters := IR.unpack_filters(state.filters):
filters = IR.combine_filters(filters, state_filters)
if state.variables:
namespace = IR.namespace(state.variables)
filters = IR.add_namespace(namespace, IR.select(filters))
return IR.select(state.match, filters=filters)
if filters is None:
filters = IR.filter(state.parents[-1].compute_path(),
IR.wrap(state.match), "IS")
return filters
@codegen.register(grammar.MatchEnum)
def convert_match_enum(node, state):
from reiz.serialization.statistics import Insertion, Statistics
from reiz.utilities import _available_cores, guarded, logger
@guarded(Insertion.FAILED, ignored_exceptions=(InternalDatabaseError, ))
def insert_file(context):
if context.is_cached():
return Insertion.CACHED
if not (tree := context.as_ast()):
return Insertion.SKIPPED
with context.connection.transaction():
module = apply_ast(tree, context)
module_select = IR.select(tree.kind_name,
filters=IR.object_ref(module),
limit=1)
update_filter = IR.filter(
IR.attribute(None, "id"),
IR.call("array_unpack",
[IR.cast("array<uuid>", IR.variable("ids"))]),
"IN",
)
for base_type in Schema.module_annotated_types:
update = IR.update(
base_type.kind_name,
filters=update_filter,
assignments={"_module": module_select},
)
context.connection.query(IR.construct(update),
def convert_logical_operator(node, state):
if node is grammar.LogicOperator.OR:
return IR.as_operator("OR")
elif node is grammar.LogicOperator.AND:
return IR.as_operator("AND")
def convert_logical_operation(node, state):
return IR.filter(
state.codegen(node.left),
state.codegen(node.right),
state.codegen(node.operator),
)
def compile_operator_flip(node, state):
return IR.negate(state.codegen(node.value))
def compile_match_string(node, state):
expr = IR.literal(node.value)
return IR.filter(state.compute_path(), expr, "LIKE")
def convert_none(node, state):
return IR.negate(IR.exists(state.compute_path()))
