def get_all_signatures(db_config, sql):
"""
RETURN ALL SIGNATURES FROM PERFHERDER DATABASE
"""
db = MySQL(db_config)
with db:
return db.query(text(sql))
def get_dataum(db_config, signature_id):
db = MySQL(db_config)
with db:
return db.query(expand_template(datum_sql, quote_list(listwrap(signature_id))))
class SnowflakeSchema(object):
@override
def __init__(self, kwargs=None):
self.settings = kwargs
self.settings.exclude = set(self.settings.exclude)
self.settings.show_foreign_keys = coalesce(
self.settings.show_foreign_keys, True)
self.all_nested_paths = None
self.nested_path_to_join = None
self.columns = None
with Explanation("scan database", debug=DEBUG):
self.db = MySQL(**kwargs.database)
with self.db:
with self.db.transaction():
self._scan_database()
def get_sql(self, get_ids):
sql = self._compose_sql(get_ids)
# ORDERING
sort = []
ordering = []
for ci, c in enumerate(self.columns):
if c.sort:
sort.append(quote_column(c.column_alias) + SQL_IS_NOT_NULL)
sort.append(quote_column(c.column_alias))
ordering.append(ci)
union_all_sql = SQL_UNION_ALL.join(sql)
union_all_sql = (SQL_SELECT + SQL_STAR + SQL_FROM +
sql_alias(sql_iso(union_all_sql), quote_column('a')) +
SQL_ORDERBY + sql_list(sort))
return union_all_sql
def _scan_database(self):
# GET ALL RELATIONS
raw_relations = self.db.query("""
SELECT
table_schema,
table_name,
referenced_table_schema,
referenced_table_name,
referenced_column_name,
constraint_name,
column_name,
ordinal_position
FROM
information_schema.key_column_usage
WHERE
referenced_column_name IS NOT NULL
""",
param=self.settings.database)
if not raw_relations:
Log.error("No relations in the database")
for r in self.settings.add_relations:
try:
a, b = map(strings.trim, r.split("->"))
a = a.split(".")
b = b.split(".")
raw_relations.append(
Data(table_schema=a[0],
table_name=a[1],
referenced_table_schema=b[0],
referenced_table_name=b[1],
referenced_column_name=b[2],
constraint_name=Random.hex(20),
column_name=a[2],
ordinal_position=1))
except Exception as e:
Log.error("Could not parse {{line|quote}}", line=r, cause=e)
relations = jx.select(raw_relations,
[{
"name": "constraint.name",
"value": "constraint_name"
}, {
"name": "table.schema",
"value": "table_schema"
}, {
"name": "table.name",
"value": "table_name"
}, {
"name": "column.name",
"value": "column_name"
}, {
"name": "referenced.table.schema",
"value": "referenced_table_schema"
}, {
"name": "referenced.table.name",
"value": "referenced_table_name"
}, {
"name": "referenced.column.name",
"value": "referenced_column_name"
}, {
"name": "ordinal_position",
"value": "ordinal_position"
}])
# GET ALL TABLES
raw_tables = self.db.query("""
SELECT
t.table_schema,
t.table_name,
c.constraint_name,
c.constraint_type,
k.column_name,
k.ordinal_position
FROM
information_schema.tables t
LEFT JOIN
information_schema.table_constraints c on c.table_name=t.table_name AND c.table_schema=t.table_schema and (constraint_type='UNIQUE' or constraint_type='PRIMARY KEY')
LEFT JOIN
information_schema.key_column_usage k on k.constraint_name=c.constraint_name AND k.table_name=t.table_name and k.table_schema=t.table_schema
ORDER BY
t.table_schema,
t.table_name,
c.constraint_name,
k.ordinal_position,
k.column_name
""",
param=self.settings.database)
# ORGANIZE, AND PICK ONE UNIQUE CONSTRAINT FOR LINKING
tables = UniqueIndex(keys=["name", "schema"])
for t, c in jx.groupby(raw_tables, ["table_name", "table_schema"]):
c = wrap(list(c))
best_index = Null
is_referenced = False
is_primary = False
for g, w in jx.groupby(c, "constraint_name"):
if not g.constraint_name:
continue
w = list(w)
ref = False
for r in relations:
if r.table.name == t.table_name and r.table.schema == t.table_schema and r.constraint.name == g.constraint_name:
ref = True
is_prime = w[0].constraint_type == "PRIMARY"
reasons_this_one_is_better = [
best_index == None, # WE DO NOT HAVE A CANDIDATE YET
is_prime
and not is_primary, # PRIMARY KEYS ARE GOOD TO HAVE
is_primary == is_prime and ref and
not is_referenced, # REFERENCED UNIQUE TUPLES ARE GOOD TOO
is_primary == is_prime and ref == is_referenced and len(w)
< len(best_index) # THE SHORTER THE TUPLE, THE BETTER
]
if any(reasons_this_one_is_better):
is_primary = is_prime
is_referenced = ref
best_index = w
tables.add({
"name": t.table_name,
"schema": t.table_schema,
"id": [b.column_name for b in best_index]
})
fact_table = tables[self.settings.fact_table,
self.settings.database.schema]
ids_table = {
"alias": "t0",
"name": "__ids__",
"schema": fact_table.schema,
"id": fact_table.id
}
relations.extend(
wrap({
"constraint": {
"name": "__link_ids_to_fact_table__"
},
"table": ids_table,
"column": {
"name": c
},
"referenced": {
"table": fact_table,
"column": {
"name": c
}
},
"ordinal_position": i
}) for i, c in enumerate(fact_table.id))
tables.add(ids_table)
# GET ALL COLUMNS
raw_columns = self.db.query("""
SELECT
column_name,
table_schema,
table_name,
ordinal_position,
data_type
FROM
information_schema.columns
""",
param=self.settings.database)
reference_only_tables = [
r.split(".")[0] for r in self.settings.reference_only
if len(r.split(".")) == 2
]
reference_all_tables = [
r.split(".")[0] for r in self.settings.reference_only
if len(r.split(".")) == 1
]
foreign_column_table_schema_triples = {(r.column.name, r.table.name,
r.table.schema)
for r in relations}
referenced_column_table_schema_triples = {
(r.referenced.column.name, r.referenced.table.name,
r.referenced.table.schema)
for r in relations
}
related_column_table_schema_triples = foreign_column_table_schema_triples | referenced_column_table_schema_triples
columns = UniqueIndex(["column.name", "table.name", "table.schema"])
for c in raw_columns:
if c.table_name in reference_only_tables:
if c.table_name + "." + c.column_name in self.settings.reference_only:
include = True
reference = True
foreign = False
elif c.column_name in tables[(c.table_name,
c.table_schema)].id:
include = self.settings.show_foreign_keys
reference = False
foreign = False
else:
include = False
reference = False
foreign = False
elif c.table_name in reference_all_tables:
# TABLES USED FOR REFERENCE, NO NESTED DOCUMENTS EXPECTED
if c.column_name in tables[(c.table_name, c.table_schema)].id:
include = self.settings.show_foreign_keys
reference = True
foreign = False
elif (c.column_name, c.table_name,
c.table_schema) in foreign_column_table_schema_triples:
include = False
reference = False
foreign = True
else:
include = True
reference = False
foreign = False
elif c.column_name in tables[(c.table_name, c.table_schema)].id:
include = self.settings.show_foreign_keys
reference = False
foreign = False
elif (c.column_name, c.table_name,
c.table_schema) in foreign_column_table_schema_triples:
include = False
reference = False
foreign = True
elif (c.column_name, c.table_name,
c.table_schema) in referenced_column_table_schema_triples:
include = self.settings.show_foreign_keys
reference = False
foreign = False
else:
include = True
reference = False
foreign = False
rel = {
"column": {
"name": c.column_name,
"type": c.data_type
},
"table": {
"name": c.table_name,
"schema": c.table_schema
},
"ordinal_position": c.ordinal_position,
"is_id": c.column_name
in tables[(c.table_name, c.table_schema)].id,
"include": include, # TRUE IF THIS COLUMN IS OUTPUTTED
"reference":
reference, # TRUE IF THIS COLUMN REPRESENTS THE ROW
"foreign": foreign # TRUE IF THIS COLUMN POINTS TO ANOTHER ROW
}
columns.add(rel)
# ITERATE OVER ALL PATHS
todo = FlatList()
output_columns = FlatList()
nested_path_to_join = {}
all_nested_paths = [["."]]
def follow_paths(position, path, nested_path, done_relations,
no_nested_docs):
if position.name in self.settings.exclude:
return
if DEBUG:
Log.note("Trace {{path}}", path=path)
if position.name != "__ids__":
# USED TO CONFIRM WE CAN ACCESS THE TABLE (WILL THROW ERROR WHEN IF IT FAILS)
self.db.query("SELECT * FROM " +
quote_column(position.name, position.schema) +
" LIMIT 1")
if position.name in reference_all_tables:
no_nested_docs = True
if position.name in reference_only_tables:
return
curr_join_list = copy(nested_path_to_join[nested_path[0]])
# INNER OBJECTS
referenced_tables = list(
jx.groupby(
jx.filter(
relations, {
"eq": {
"table.name": position.name,
"table.schema": position.schema
}
}), "constraint.name"))
for g, constraint_columns in referenced_tables:
g = unwrap(g)
constraint_columns = deepcopy(constraint_columns)
if g["constraint.name"] in done_relations:
continue
if any(cc for cc in constraint_columns
if cc.referenced.table.name in self.settings.exclude):
continue
done_relations.add(g["constraint.name"])
many_to_one_joins = nested_path_to_join[nested_path[0]]
index = len(many_to_one_joins)
alias = "t" + text_type(index)
for c in constraint_columns:
c.referenced.table.alias = alias
c.table = position
many_to_one_joins.append({
"join_columns": constraint_columns,
"path": path,
"nested_path": nested_path
})
# referenced_table_path = join_field(split_field(path) + ["/".join(constraint_columns.referenced.table.name)])
# HANDLE THE COMMON *id SUFFIX
name = []
for a, b in zip(constraint_columns.column.name,
constraint_columns.referenced.table.name):
if a.startswith(b):
name.append(b)
elif a.endswith("_id"):
name.append(a[:-3])
else:
name.append(a)
referenced_column_path = join_field(
split_field(path) + ["/".join(name)])
col_pointer_name = relative_field(referenced_column_path,
nested_path[0])
# insert into nested1 VALUES (100, 10, 'aaa', -1);
# id.about.time.nested1 .ref=10
# id.about.time.nested1 .ref.name
for col in columns:
if col.table.name == constraint_columns[
0].referenced.table.name and col.table.schema == constraint_columns[
0].referenced.table.schema:
col_full_name = concat_field(
col_pointer_name, literal_field(col.column.name))
if col.is_id and col.table.name == fact_table.name and col.table.schema == fact_table.schema:
# ALWAYS SHOW THE ID OF THE FACT
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
True,
"path":
referenced_column_path,
"nested_path":
nested_path,
"put":
col_full_name
})
elif col.column.name == constraint_columns[
0].column.name:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
False,
"path":
referenced_column_path,
"nested_path":
nested_path,
"put":
col_full_name
if self.settings.show_foreign_keys else None
})
elif col.is_id:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
False,
"path":
referenced_column_path,
"nested_path":
nested_path,
"put":
col_full_name
if self.settings.show_foreign_keys else None
})
elif col.reference:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
False,
"path":
referenced_column_path,
"nested_path":
nested_path,
"put":
col_pointer_name
if not self.settings.show_foreign_keys else
col_full_name # REFERENCE FIELDS CAN REPLACE THE WHOLE OBJECT BEING REFERENCED
})
elif col.include:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
False,
"path":
referenced_column_path,
"nested_path":
nested_path,
"put":
col_full_name
})
if position.name in reference_only_tables:
continue
todo.append(
Data(position=copy(constraint_columns[0].referenced.table),
path=referenced_column_path,
nested_path=nested_path,
done_relations=copy(done_relations),
no_nested_docs=no_nested_docs))
# NESTED OBJECTS
if not no_nested_docs:
for g, constraint_columns in jx.groupby(
jx.filter(
relations, {
"eq": {
"referenced.table.name": position.name,
"referenced.table.schema": position.schema
}
}), "constraint.name"):
g = unwrap(g)
constraint_columns = deepcopy(constraint_columns)
if g["constraint.name"] in done_relations:
continue
done_relations.add(g["constraint.name"])
many_table = set(constraint_columns.table.name)
if not (many_table - self.settings.exclude):
continue
referenced_column_path = join_field(
split_field(path) + ["/".join(many_table)])
new_nested_path = [referenced_column_path] + nested_path
all_nested_paths.append(new_nested_path)
# if new_path not in self.settings.include:
# Log.note("Exclude nested path {{path}}", path=new_path)
# continue
one_to_many_joins = nested_path_to_join[
referenced_column_path] = copy(curr_join_list)
index = len(one_to_many_joins)
alias = "t" + text_type(index)
for c in constraint_columns:
c.table.alias = alias
c.referenced.table = position
one_to_many_joins.append(
set_default({}, g, {
"children": True,
"join_columns": constraint_columns,
"path": path,
"nested_path": nested_path
}))
# insert into nested1 VALUES (100, 10, 'aaa', -1); # id.about.time.nested1 .ref=10# id.about.time.nested1 .ref.name
for col in columns:
if col.table.name == constraint_columns[
0].table.name and col.table.schema == constraint_columns[
0].table.schema:
col_full_name = join_field(
split_field(referenced_column_path)
[len(split_field(new_nested_path[0])):] +
[literal_field(col.column.name)])
if col.column.name == constraint_columns[
0].column.name:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
col.is_id,
"path":
referenced_column_path,
"nested_path":
new_nested_path,
"put":
col_full_name if
self.settings.show_foreign_keys else None
})
elif col.is_id:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
col.is_id,
"path":
referenced_column_path,
"nested_path":
new_nested_path,
"put":
col_full_name if
self.settings.show_foreign_keys else None
})
else:
c_index = len(output_columns)
output_columns.append({
"table_alias":
alias,
"column_alias":
"c" + text_type(c_index),
"column":
col,
"sort":
col.is_id,
"path":
referenced_column_path,
"nested_path":
new_nested_path,
"put":
col_full_name if col.include else None
})
todo.append(
Data(position=constraint_columns[0].table,
path=referenced_column_path,
nested_path=new_nested_path,
done_relations=copy(done_relations),
no_nested_docs=no_nested_docs))
path = "."
nested_path = [path]
nested_path_to_join["."] = [{
"path":
path,
"join_columns": [{
"referenced": {
"table": ids_table
}
}],
"nested_path":
nested_path
}]
todo.append(
Data(position=ids_table,
path=path,
nested_path=nested_path,
done_relations=set(),
no_nested_docs=False))
while todo:
item = todo.pop(0)
follow_paths(**item)
self.all_nested_paths = all_nested_paths
self.nested_path_to_join = nested_path_to_join
self.columns = output_columns
def _compose_sql(self, get_ids):
"""
:param get_ids: SQL to get the ids, and used to select the documents returned
:return:
"""
sql = []
for nested_path in self.all_nested_paths:
# MAKE THE REQUIRED JOINS
sql_joins = []
for i, curr_join in enumerate(
self.nested_path_to_join[nested_path[0]]):
curr_join = wrap(curr_join)
rel = curr_join.join_columns[0]
if i == 0:
sql_joins.append(
SQL_FROM +
sql_alias(sql_iso(get_ids),
quote_column(rel.referenced.table.alias)))
elif curr_join.children:
full_name = quote_column(rel.table.name, rel.table.schema)
sql_joins.append(SQL_JOIN + sql_alias(
full_name, quote_column(rel.table.alias)
) + SQL_ON + sql_and(
quote_column(const_col.column.name, rel.table.alias) +
"=" + quote_column(const_col.referenced.column.name,
rel.referenced.table.alias)
for const_col in curr_join.join_columns))
else:
full_name = quote_column(rel.referenced.table.name,
rel.referenced.table.schema)
sql_joins.append(SQL_LEFT_JOIN + sql_alias(
full_name, quote_column(rel.referenced.table.alias)
) + SQL_ON + sql_and(
quote_column(const_col.referenced.column.name,
rel.referenced.table.alias) + "=" +
quote_column(const_col.column.name, rel.table.alias)
for const_col in curr_join.join_columns))
# ONLY SELECT WHAT WE NEED, NULL THE REST
selects = []
not_null_column_seen = False
for ci, c in enumerate(self.columns):
if c.column_alias[1:] != text_type(ci):
Log.error("expecting consistency")
if c.nested_path[0] == nested_path[0]:
s = sql_alias(
quote_column(c.column.column.name, c.table_alias),
quote_column(c.column_alias))
if s == None:
Log.error("bug")
selects.append(s)
not_null_column_seen = True
elif startswith_field(nested_path[0], c.path):
# PARENT ID REFERENCES
if c.column.is_id:
s = sql_alias(
quote_column(c.column.column.name, c.table_alias),
quote_column(c.column_alias))
selects.append(s)
not_null_column_seen = True
else:
selects.append(
sql_alias(SQL_NULL, quote_column(c.column_alias)))
else:
selects.append(
sql_alias(SQL_NULL, quote_column(c.column_alias)))
if not_null_column_seen:
sql.append(SQL_SELECT + sql_list(selects) + "".join(sql_joins))
return sql
