def _make_txn_selector(self):
"""Helper for :meth:`read`."""
if self._transaction_id is not None:
return TransactionSelector(id=self._transaction_id)
if self._read_timestamp:
key = "read_timestamp"
value = _datetime_to_pb_timestamp(self._read_timestamp)
elif self._min_read_timestamp:
key = "min_read_timestamp"
value = _datetime_to_pb_timestamp(self._min_read_timestamp)
elif self._max_staleness:
key = "max_staleness"
value = _timedelta_to_duration_pb(self._max_staleness)
elif self._exact_staleness:
key = "exact_staleness"
value = _timedelta_to_duration_pb(self._exact_staleness)
else:
key = "strong"
value = True
options = TransactionOptions(read_only=TransactionOptions.ReadOnly(
**{key: value}))
if self._multi_use:
return TransactionSelector(begin=options)
else:
return TransactionSelector(single_use=options)
def _make_txn_selector(self):
from google.cloud.spanner_v1.proto.transaction_pb2 import (
TransactionOptions, TransactionSelector)
if self._transaction_id:
return TransactionSelector(id=self._transaction_id)
options = TransactionOptions(
read_only=TransactionOptions.ReadOnly(strong=True))
if self._multi_use:
return TransactionSelector(begin=options)
return TransactionSelector(single_use=options)
def execute_partitioned_dml(self, dml, params=None, param_types=None):
"""Execute a partitionable DML statement.
:type dml: str
:param dml: DML statement
:type params: dict, {str -> column value}
:param params: values for parameter replacement. Keys must match
the names used in ``dml``.
:type param_types: dict[str -> Union[dict, .types.Type]]
:param param_types:
(Optional) maps explicit types for one or more param values;
required if parameters are passed.
:rtype: int
:returns: Count of rows affected by the DML statement.
"""
if params is not None:
if param_types is None:
raise ValueError(
"Specify 'param_types' when passing 'params'.")
params_pb = Struct(fields={
key: _make_value_pb(value)
for key, value in params.items()
})
else:
params_pb = None
api = self.spanner_api
txn_options = TransactionOptions(
partitioned_dml=TransactionOptions.PartitionedDml())
metadata = _metadata_with_prefix(self.name)
with SessionCheckout(self._pool) as session:
txn = api.begin_transaction(session.name,
txn_options,
metadata=metadata)
txn_selector = TransactionSelector(id=txn.id)
restart = functools.partial(
api.execute_streaming_sql,
session.name,
dml,
transaction=txn_selector,
params=params_pb,
param_types=param_types,
metadata=metadata,
)
iterator = _restart_on_unavailable(restart)
result_set = StreamedResultSet(iterator)
list(result_set) # consume all partials
return result_set.stats.row_count_lower_bound
def execute_pdml():
with SessionCheckout(self._pool) as session:
txn = api.begin_transaction(session.name,
txn_options,
metadata=metadata)
txn_selector = TransactionSelector(id=txn.id)
restart = functools.partial(
api.execute_streaming_sql,
session.name,
dml,
transaction=txn_selector,
params=params_pb,
param_types=param_types,
query_options=query_options,
metadata=metadata,
)
iterator = _restart_on_unavailable(restart)
result_set = StreamedResultSet(iterator)
list(result_set) # consume all partials
return result_set.stats.row_count_lower_bound
def _partition_read_helper(self,
multi_use,
w_txn,
size=None,
max_partitions=None,
index=None):
from google.cloud.spanner_v1.keyset import KeySet
from google.cloud.spanner_v1.types import Partition
from google.cloud.spanner_v1.types import PartitionOptions
from google.cloud.spanner_v1.types import PartitionResponse
from google.cloud.spanner_v1.types import Transaction
from google.cloud.spanner_v1.proto.transaction_pb2 import TransactionSelector
keyset = KeySet(all_=True)
new_txn_id = b"ABECAB91"
token_1 = b"FACE0FFF"
token_2 = b"BADE8CAF"
response = PartitionResponse(
partitions=[
Partition(partition_token=token_1),
Partition(partition_token=token_2),
],
transaction=Transaction(id=new_txn_id),
)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.partition_read.return_value = response
session = _Session(database)
derived = self._makeDerived(session)
derived._multi_use = multi_use
if w_txn:
derived._transaction_id = TXN_ID
tokens = list(
derived.partition_read(
TABLE_NAME,
COLUMNS,
keyset,
index=index,
partition_size_bytes=size,
max_partitions=max_partitions,
))
self.assertEqual(tokens, [token_1, token_2])
expected_txn_selector = TransactionSelector(id=TXN_ID)
expected_partition_options = PartitionOptions(
partition_size_bytes=size, max_partitions=max_partitions)
api.partition_read.assert_called_once_with(
session=self.SESSION_NAME,
table=TABLE_NAME,
columns=COLUMNS,
key_set=keyset._to_pb(),
transaction=expected_txn_selector,
index=index,
partition_options=expected_partition_options,
metadata=[("google-cloud-resource-prefix", database.name)],
)
def _make_txn_selector(self):
"""Helper for :meth:`read`.
:rtype:
:class:`~.transaction_pb2.TransactionSelector`
:returns: a selector configured for read-write transaction semantics.
"""
self._check_state()
return TransactionSelector(id=self._transaction_id)
def _execute_update_helper(self, count=0, query_options=None):
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.proto.result_set_pb2 import (
ResultSet,
ResultSetStats,
)
from google.cloud.spanner_v1.proto.transaction_pb2 import TransactionSelector
from google.cloud.spanner_v1._helpers import (
_make_value_pb,
_merge_query_options,
)
MODE = 2 # PROFILE
stats_pb = ResultSetStats(row_count_exact=1)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.execute_sql.return_value = ResultSet(stats=stats_pb)
session = _Session(database)
transaction = self._make_one(session)
transaction._transaction_id = self.TRANSACTION_ID
transaction._execute_sql_count = count
row_count = transaction.execute_update(
DML_QUERY_WITH_PARAM,
PARAMS,
PARAM_TYPES,
query_mode=MODE,
query_options=query_options,
)
self.assertEqual(row_count, 1)
expected_transaction = TransactionSelector(id=self.TRANSACTION_ID)
expected_params = Struct(
fields={key: _make_value_pb(value) for (key, value) in PARAMS.items()}
)
expected_query_options = database._instance._client._query_options
if query_options:
expected_query_options = _merge_query_options(
expected_query_options, query_options
)
api.execute_sql.assert_called_once_with(
self.SESSION_NAME,
DML_QUERY_WITH_PARAM,
transaction=expected_transaction,
params=expected_params,
param_types=PARAM_TYPES,
query_mode=MODE,
query_options=expected_query_options,
seqno=count,
metadata=[("google-cloud-resource-prefix", database.name)],
)
self.assertEqual(transaction._execute_sql_count, count + 1)
def _batch_update_helper(self, error_after=None, count=0):
from google.rpc.status_pb2 import Status
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.proto.result_set_pb2 import ResultSet
from google.cloud.spanner_v1.proto.result_set_pb2 import ResultSetStats
from google.cloud.spanner_v1.proto.spanner_pb2 import ExecuteBatchDmlResponse
from google.cloud.spanner_v1.proto.transaction_pb2 import TransactionSelector
from google.cloud.spanner_v1._helpers import _make_value_pb
insert_dml = "INSERT INTO table(pkey, desc) VALUES (%pkey, %desc)"
insert_params = {"pkey": 12345, "desc": "DESCRIPTION"}
insert_param_types = {"pkey": "INT64", "desc": "STRING"}
update_dml = 'UPDATE table SET desc = desc + "-amended"'
delete_dml = "DELETE FROM table WHERE desc IS NULL"
dml_statements = [
(insert_dml, insert_params, insert_param_types),
update_dml,
delete_dml,
]
stats_pbs = [
ResultSetStats(row_count_exact=1),
ResultSetStats(row_count_exact=2),
ResultSetStats(row_count_exact=3),
]
if error_after is not None:
stats_pbs = stats_pbs[:error_after]
expected_status = Status(code=400)
else:
expected_status = Status(code=200)
expected_row_counts = [stats.row_count_exact for stats in stats_pbs]
response = ExecuteBatchDmlResponse(
status=expected_status,
result_sets=[ResultSet(stats=stats_pb) for stats_pb in stats_pbs],
)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.execute_batch_dml.return_value = response
session = _Session(database)
transaction = self._make_one(session)
transaction._transaction_id = self.TRANSACTION_ID
transaction._execute_sql_count = count
status, row_counts = transaction.batch_update(dml_statements)
self.assertEqual(status, expected_status)
self.assertEqual(row_counts, expected_row_counts)
expected_transaction = TransactionSelector(id=self.TRANSACTION_ID)
expected_insert_params = Struct(
fields={
key: _make_value_pb(value) for (key, value) in insert_params.items()
}
)
expected_statements = [
{
"sql": insert_dml,
"params": expected_insert_params,
"param_types": insert_param_types,
},
{"sql": update_dml},
{"sql": delete_dml},
]
api.execute_batch_dml.assert_called_once_with(
session=self.SESSION_NAME,
transaction=expected_transaction,
statements=expected_statements,
seqno=count,
metadata=[("google-cloud-resource-prefix", database.name)],
)
self.assertEqual(transaction._execute_sql_count, count + 1)
def execute_partitioned_dml(self,
dml,
params=None,
param_types=None,
query_options=None):
"""Execute a partitionable DML statement.
:type dml: str
:param dml: DML statement
:type params: dict, {str -> column value}
:param params: values for parameter replacement. Keys must match
the names used in ``dml``.
:type param_types: dict[str -> Union[dict, .types.Type]]
:param param_types:
(Optional) maps explicit types for one or more param values;
required if parameters are passed.
:type query_options:
:class:`~google.cloud.spanner_v1.proto.ExecuteSqlRequest.QueryOptions`
or :class:`dict`
:param query_options:
(Optional) Query optimizer configuration to use for the given query.
If a dict is provided, it must be of the same form as the protobuf
message :class:`~google.cloud.spanner_v1.types.QueryOptions`
:rtype: int
:returns: Count of rows affected by the DML statement.
"""
query_options = _merge_query_options(
self._instance._client._query_options, query_options)
if params is not None:
if param_types is None:
raise ValueError(
"Specify 'param_types' when passing 'params'.")
params_pb = Struct(fields={
key: _make_value_pb(value)
for key, value in params.items()
})
else:
params_pb = None
api = self.spanner_api
txn_options = TransactionOptions(
partitioned_dml=TransactionOptions.PartitionedDml())
metadata = _metadata_with_prefix(self.name)
with SessionCheckout(self._pool) as session:
txn = api.begin_transaction(session.name,
txn_options,
metadata=metadata)
txn_selector = TransactionSelector(id=txn.id)
restart = functools.partial(
api.execute_streaming_sql,
session.name,
dml,
transaction=txn_selector,
params=params_pb,
param_types=param_types,
query_options=query_options,
metadata=metadata,
)
iterator = _restart_on_unavailable(restart)
result_set = StreamedResultSet(iterator)
list(result_set) # consume all partials
return result_set.stats.row_count_lower_bound
def _partition_query_helper(self,
multi_use,
w_txn,
size=None,
max_partitions=None):
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.types import Partition
from google.cloud.spanner_v1.types import PartitionOptions
from google.cloud.spanner_v1.types import PartitionResponse
from google.cloud.spanner_v1.types import Transaction
from google.cloud.spanner_v1.proto.transaction_pb2 import (
TransactionSelector)
from google.cloud.spanner_v1._helpers import _make_value_pb
new_txn_id = b'ABECAB91'
token_1 = b'FACE0FFF'
token_2 = b'BADE8CAF'
response = PartitionResponse(
partitions=[
Partition(partition_token=token_1),
Partition(partition_token=token_2),
],
transaction=Transaction(id=new_txn_id),
)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.partition_query.return_value = response
session = _Session(database)
derived = self._makeDerived(session)
derived._multi_use = multi_use
if w_txn:
derived._transaction_id = TXN_ID
tokens = list(
derived.partition_query(
SQL_QUERY_WITH_PARAM,
PARAMS,
PARAM_TYPES,
partition_size_bytes=size,
max_partitions=max_partitions,
))
self.assertEqual(tokens, [token_1, token_2])
expected_params = Struct(fields={
key: _make_value_pb(value)
for (key, value) in PARAMS.items()
})
expected_txn_selector = TransactionSelector(id=TXN_ID)
expected_partition_options = PartitionOptions(
partition_size_bytes=size, max_partitions=max_partitions)
api.partition_query.assert_called_once_with(
session=self.SESSION_NAME,
sql=SQL_QUERY_WITH_PARAM,
transaction=expected_txn_selector,
params=expected_params,
param_types=PARAM_TYPES,
partition_options=expected_partition_options,
metadata=[('google-cloud-resource-prefix', database.name)],
)
def _execute_sql_helper(self,
multi_use,
first=True,
count=0,
partition=None,
sql_count=0):
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.proto.result_set_pb2 import (
PartialResultSet, ResultSetMetadata, ResultSetStats)
from google.cloud.spanner_v1.proto.transaction_pb2 import (
TransactionSelector, TransactionOptions)
from google.cloud.spanner_v1.proto.type_pb2 import Type, StructType
from google.cloud.spanner_v1.proto.type_pb2 import STRING, INT64
from google.cloud.spanner_v1._helpers import _make_value_pb
VALUES = [
[u'bharney', u'rhubbyl', 31],
[u'phred', u'phlyntstone', 32],
]
VALUE_PBS = [[_make_value_pb(item) for item in row] for row in VALUES]
MODE = 2 # PROFILE
struct_type_pb = StructType(fields=[
StructType.Field(name='first_name', type=Type(code=STRING)),
StructType.Field(name='last_name', type=Type(code=STRING)),
StructType.Field(name='age', type=Type(code=INT64)),
])
metadata_pb = ResultSetMetadata(row_type=struct_type_pb)
stats_pb = ResultSetStats(query_stats=Struct(
fields={
'rows_returned': _make_value_pb(2),
}))
result_sets = [
PartialResultSet(values=VALUE_PBS[0], metadata=metadata_pb),
PartialResultSet(values=VALUE_PBS[1], stats=stats_pb),
]
iterator = _MockIterator(*result_sets)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.execute_streaming_sql.return_value = iterator
session = _Session(database)
derived = self._makeDerived(session)
derived._multi_use = multi_use
derived._read_request_count = count
derived._execute_sql_count = sql_count
if not first:
derived._transaction_id = TXN_ID
result_set = derived.execute_sql(SQL_QUERY_WITH_PARAM,
PARAMS,
PARAM_TYPES,
query_mode=MODE,
partition=partition)
self.assertEqual(derived._read_request_count, count + 1)
if multi_use:
self.assertIs(result_set._source, derived)
else:
self.assertIsNone(result_set._source)
self.assertEqual(list(result_set), VALUES)
self.assertEqual(result_set.metadata, metadata_pb)
self.assertEqual(result_set.stats, stats_pb)
txn_options = TransactionOptions(read_only=TransactionOptions.ReadOnly(
strong=True))
if multi_use:
if first:
expected_transaction = TransactionSelector(begin=txn_options)
else:
expected_transaction = TransactionSelector(id=TXN_ID)
else:
expected_transaction = TransactionSelector(single_use=txn_options)
expected_params = Struct(fields={
key: _make_value_pb(value)
for (key, value) in PARAMS.items()
})
api.execute_streaming_sql.assert_called_once_with(
self.SESSION_NAME,
SQL_QUERY_WITH_PARAM,
transaction=expected_transaction,
params=expected_params,
param_types=PARAM_TYPES,
query_mode=MODE,
partition_token=partition,
seqno=sql_count,
metadata=[('google-cloud-resource-prefix', database.name)],
)
self.assertEqual(derived._execute_sql_count, sql_count + 1)
def _read_helper(self, multi_use, first=True, count=0, partition=None):
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.proto.result_set_pb2 import (
PartialResultSet, ResultSetMetadata, ResultSetStats)
from google.cloud.spanner_v1.proto.transaction_pb2 import (
TransactionSelector, TransactionOptions)
from google.cloud.spanner_v1.proto.type_pb2 import Type, StructType
from google.cloud.spanner_v1.proto.type_pb2 import STRING, INT64
from google.cloud.spanner_v1.keyset import KeySet
from google.cloud.spanner_v1._helpers import _make_value_pb
VALUES = [
[u'bharney', 31],
[u'phred', 32],
]
VALUE_PBS = [[_make_value_pb(item) for item in row] for row in VALUES]
struct_type_pb = StructType(fields=[
StructType.Field(name='name', type=Type(code=STRING)),
StructType.Field(name='age', type=Type(code=INT64)),
])
metadata_pb = ResultSetMetadata(row_type=struct_type_pb)
stats_pb = ResultSetStats(query_stats=Struct(
fields={
'rows_returned': _make_value_pb(2),
}))
result_sets = [
PartialResultSet(values=VALUE_PBS[0], metadata=metadata_pb),
PartialResultSet(values=VALUE_PBS[1], stats=stats_pb),
]
KEYS = [['*****@*****.**'], ['*****@*****.**']]
keyset = KeySet(keys=KEYS)
INDEX = 'email-address-index'
LIMIT = 20
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.streaming_read.return_value = _MockIterator(*result_sets)
session = _Session(database)
derived = self._makeDerived(session)
derived._multi_use = multi_use
derived._read_request_count = count
if not first:
derived._transaction_id = TXN_ID
if partition is not None: # 'limit' and 'partition' incompatible
result_set = derived.read(TABLE_NAME,
COLUMNS,
keyset,
index=INDEX,
partition=partition)
else:
result_set = derived.read(TABLE_NAME,
COLUMNS,
keyset,
index=INDEX,
limit=LIMIT)
self.assertEqual(derived._read_request_count, count + 1)
if multi_use:
self.assertIs(result_set._source, derived)
else:
self.assertIsNone(result_set._source)
self.assertEqual(list(result_set), VALUES)
self.assertEqual(result_set.metadata, metadata_pb)
self.assertEqual(result_set.stats, stats_pb)
txn_options = TransactionOptions(read_only=TransactionOptions.ReadOnly(
strong=True))
if multi_use:
if first:
expected_transaction = TransactionSelector(begin=txn_options)
else:
expected_transaction = TransactionSelector(id=TXN_ID)
else:
expected_transaction = TransactionSelector(single_use=txn_options)
if partition is not None:
expected_limit = 0
else:
expected_limit = LIMIT
api.streaming_read.assert_called_once_with(
self.SESSION_NAME,
TABLE_NAME,
COLUMNS,
keyset._to_pb(),
transaction=expected_transaction,
index=INDEX,
limit=expected_limit,
partition_token=partition,
metadata=[('google-cloud-resource-prefix', database.name)],
)
def _execute_sql_helper(
self,
multi_use,
first=True,
count=0,
partition=None,
sql_count=0,
query_options=None,
timeout=google.api_core.gapic_v1.method.DEFAULT,
retry=google.api_core.gapic_v1.method.DEFAULT,
):
from google.protobuf.struct_pb2 import Struct
from google.cloud.spanner_v1.proto.result_set_pb2 import (
PartialResultSet,
ResultSetMetadata,
ResultSetStats,
)
from google.cloud.spanner_v1.proto.transaction_pb2 import (
TransactionSelector,
TransactionOptions,
)
from google.cloud.spanner_v1.proto.type_pb2 import Type, StructType
from google.cloud.spanner_v1.proto.type_pb2 import STRING, INT64
from google.cloud.spanner_v1._helpers import (
_make_value_pb,
_merge_query_options,
)
VALUES = [[u"bharney", u"rhubbyl", 31], [u"phred", u"phlyntstone", 32]]
VALUE_PBS = [[_make_value_pb(item) for item in row] for row in VALUES]
MODE = 2 # PROFILE
struct_type_pb = StructType(
fields=[
StructType.Field(name="first_name", type=Type(code=STRING)),
StructType.Field(name="last_name", type=Type(code=STRING)),
StructType.Field(name="age", type=Type(code=INT64)),
]
)
metadata_pb = ResultSetMetadata(row_type=struct_type_pb)
stats_pb = ResultSetStats(
query_stats=Struct(fields={"rows_returned": _make_value_pb(2)})
)
result_sets = [
PartialResultSet(values=VALUE_PBS[0], metadata=metadata_pb),
PartialResultSet(values=VALUE_PBS[1], stats=stats_pb),
]
iterator = _MockIterator(*result_sets)
database = _Database()
api = database.spanner_api = self._make_spanner_api()
api.execute_streaming_sql.return_value = iterator
session = _Session(database)
derived = self._makeDerived(session)
derived._multi_use = multi_use
derived._read_request_count = count
derived._execute_sql_count = sql_count
if not first:
derived._transaction_id = TXN_ID
result_set = derived.execute_sql(
SQL_QUERY_WITH_PARAM,
PARAMS,
PARAM_TYPES,
query_mode=MODE,
query_options=query_options,
partition=partition,
retry=retry,
timeout=timeout,
)
self.assertEqual(derived._read_request_count, count + 1)
if multi_use:
self.assertIs(result_set._source, derived)
else:
self.assertIsNone(result_set._source)
self.assertEqual(list(result_set), VALUES)
self.assertEqual(result_set.metadata, metadata_pb)
self.assertEqual(result_set.stats, stats_pb)
txn_options = TransactionOptions(
read_only=TransactionOptions.ReadOnly(strong=True)
)
if multi_use:
if first:
expected_transaction = TransactionSelector(begin=txn_options)
else:
expected_transaction = TransactionSelector(id=TXN_ID)
else:
expected_transaction = TransactionSelector(single_use=txn_options)
expected_params = Struct(
fields={key: _make_value_pb(value) for (key, value) in PARAMS.items()}
)
expected_query_options = database._instance._client._query_options
if query_options:
expected_query_options = _merge_query_options(
expected_query_options, query_options
)
api.execute_streaming_sql.assert_called_once_with(
self.SESSION_NAME,
SQL_QUERY_WITH_PARAM,
transaction=expected_transaction,
params=expected_params,
param_types=PARAM_TYPES,
query_mode=MODE,
query_options=expected_query_options,
partition_token=partition,
seqno=sql_count,
metadata=[("google-cloud-resource-prefix", database.name)],
timeout=timeout,
retry=retry,
)
self.assertEqual(derived._execute_sql_count, sql_count + 1)
self.assertSpanAttributes(
"CloudSpanner.ReadWriteTransaction",
status=StatusCanonicalCode.OK,
attributes=dict(BASE_ATTRIBUTES, **{"db.statement": SQL_QUERY_WITH_PARAM}),
)