chore(deps): update dependency google-cloud-spanner to v3.51.0 (#542)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-spanner](https://redirect.github.com/googleapis/python-spanner) | `==3.50.1` -> `==3.51.0` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/google-cloud-spanner/3.51.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/google-cloud-spanner/3.51.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/google-cloud-spanner/3.50.1/3.51.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/google-cloud-spanner/3.50.1/3.51.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-spanner (google-cloud-spanner)</summary>

### [`v3.51.0`](https://redirect.github.com/googleapis/python-spanner/blob/HEAD/CHANGELOG.md#3510-2024-12-05)

[Compare Source](https://redirect.github.com/googleapis/python-spanner/compare/v3.50.1...v3.51.0)

##### Features

-   Add connection variable for ignoring transaction warnings ([#&#8203;1249](https://redirect.github.com/googleapis/python-spanner/issues/1249)) ([eeb7836](https://redirect.github.com/googleapis/python-spanner/commit/eeb7836b6350aa9626dfb733208e6827d38bb9c9))
-   **spanner:** Implement custom tracer_provider injection for opentelemetry traces ([#&#8203;1229](https://redirect.github.com/googleapis/python-spanner/issues/1229)) ([6869ed6](https://redirect.github.com/googleapis/python-spanner/commit/6869ed651e41d7a8af046884bc6c792a4177f766))
-   Support float32 parameters in dbapi ([#&#8203;1245](https://redirect.github.com/googleapis/python-spanner/issues/1245)) ([829b799](https://redirect.github.com/googleapis/python-spanner/commit/829b799e0c9c6da274bf95c272cda564cfdba928))

##### Bug Fixes

-   Allow setting connection.read_only to same value ([#&#8203;1247](https://redirect.github.com/googleapis/python-spanner/issues/1247)) ([5e8ca94](https://redirect.github.com/googleapis/python-spanner/commit/5e8ca949b583fbcf0b92b42696545973aad8c78f))
-   Allow setting staleness to same value in tx ([#&#8203;1253](https://redirect.github.com/googleapis/python-spanner/issues/1253)) ([a214885](https://redirect.github.com/googleapis/python-spanner/commit/a214885ed474f3d69875ef580d5f8cbbabe9199a))
-   Dbapi raised AttributeError with \[] as arguments ([#&#8203;1257](https://redirect.github.com/googleapis/python-spanner/issues/1257)) ([758bf48](https://redirect.github.com/googleapis/python-spanner/commit/758bf4889a7f3346bc8282a3eed47aee43be650c))

##### Performance Improvements

-   Optimize ResultSet decoding ([#&#8203;1244](https://redirect.github.com/googleapis/python-spanner/issues/1244)) ([ccae6e0](https://redirect.github.com/googleapis/python-spanner/commit/ccae6e0287ba6cf3c14f15a907b2106b11ef1fdc))
-   Remove repeated GetSession calls for FixedSizePool ([#&#8203;1252](https://redirect.github.com/googleapis/python-spanner/issues/1252)) ([c064815](https://redirect.github.com/googleapis/python-spanner/commit/c064815abaaa4b564edd6f0e365a37e7e839080c))

##### Documentation

-   **samples:** Add samples for Cloud Spanner Default Backup Schedules ([#&#8203;1238](https://redirect.github.com/googleapis/python-spanner/issues/1238)) ([054a186](https://redirect.github.com/googleapis/python-spanner/commit/054a18658eedc5d4dbecb7508baa3f3d67f5b815))

</details>

---

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---

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---

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Author: renovate-bot

requirements.txt

@@ -157,9 +157,9 @@ google-cloud-core==2.4.1 \
     --hash=sha256:9b7749272a812bde58fff28868d0c5e2f585b82f37e09a1f6ed2d4d10f134073 \
     --hash=sha256:a9e6a4422b9ac5c29f79a0ede9485473338e2ce78d91f2370c01e730eab22e61
     # via google-cloud-spanner
-google-cloud-spanner==3.50.1 \
-    --hash=sha256:82937ea03b55de86bddf622f555aeae65ae86bb4f28ab35bd920ac505917c9bf \
-    --hash=sha256:9d399aa53fae58816023a4eb31fa267333c3a879a9221229e7f06fdda543884a
+google-cloud-spanner==3.51.0 \
+    --hash=sha256:2d01f33582526ebe7fab62034e92e722e512c21f6bc4abe27e03d86ef7ea576a \
+    --hash=sha256:346c2c20f64847883464fb0de5a6f9b48ecc6f79b032a2fb3a0aa088d9a9863f
     # via -r requirements.in
 googleapis-common-protos[grpc]==1.66.0 \
     --hash=sha256:c3e7b33d15fdca5374cc0a7346dd92ffa847425cc4ea941d970f13680052ec8c \

test/mockserver_tests/test_bit_reversed_sequence.py

@@ -21,7 +21,6 @@
     BatchCreateSessionsRequest,
     ExecuteSqlRequest,
     CommitRequest,
-    GetSessionRequest,
     BeginTransactionRequest,
 )
 from test.mockserver_tests.mock_server_test_base import (
@@ -128,10 +127,8 @@ def test_insert_row(self):
             session.commit()
         # Verify the requests that we got.
         requests = self.spanner_service.requests
-        eq_(5, len(requests))
+        eq_(4, len(requests))
         is_instance_of(requests[0], BatchCreateSessionsRequest)
-        # We should get rid of this extra round-trip for GetSession....
-        is_instance_of(requests[1], GetSessionRequest)
-        is_instance_of(requests[2], BeginTransactionRequest)
-        is_instance_of(requests[3], ExecuteSqlRequest)
-        is_instance_of(requests[4], CommitRequest)
+        is_instance_of(requests[1], BeginTransactionRequest)
+        is_instance_of(requests[2], ExecuteSqlRequest)
+        is_instance_of(requests[3], CommitRequest)

test/test_suite_13.py

@@ -1300,6 +1300,9 @@ def test_float_as_float(self):
             filter_=lambda n: n is not None and round(n, 5) or None,
         )
 
+    def test_float_coerce_round_trip(self, connection):
+        pass
+
     @requires.precision_numerics_general
     def test_precision_decimal(self):
         """

test/test_suite_14.py

@@ -27,7 +27,7 @@
 from google.cloud.spanner_v1 import RequestOptions, Client
 
 import sqlalchemy
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, literal, FLOAT
 from sqlalchemy import inspect
 from sqlalchemy import testing
 from sqlalchemy import ForeignKey
@@ -53,6 +53,7 @@
 from sqlalchemy import Float
 from sqlalchemy import LargeBinary
 from sqlalchemy import String
+from sqlalchemy.sql.expression import cast
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relation
 from sqlalchemy.orm import Session
@@ -1650,6 +1651,13 @@ def test_float_as_float(self, do_numeric_test):
             filter_=lambda n: n is not None and round(n, 5) or None,
         )
 
+    @testing.requires.literal_float_coercion
+    def test_float_coerce_round_trip(self, connection):
+        expr = 15.7563
+
+        val = connection.scalar(select(cast(literal(expr), FLOAT)))
+        eq_(val, expr)
+
     @requires.precision_numerics_general
     def test_precision_decimal(self, do_numeric_test):
         """

test/test_suite_20.py

@@ -26,7 +26,7 @@
 
 from google.cloud.spanner_v1 import RequestOptions, Client
 import sqlalchemy
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, literal, FLOAT
 from sqlalchemy.engine import Inspector
 from sqlalchemy import inspect
 from sqlalchemy import testing
@@ -55,6 +55,7 @@
 from sqlalchemy import Float
 from sqlalchemy import LargeBinary
 from sqlalchemy import String
+from sqlalchemy.sql.expression import cast
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import relationship
 from sqlalchemy.orm import Session
@@ -2455,6 +2456,13 @@ def test_float_as_float(self, do_numeric_test):
             filter_=lambda n: n is not None and round(n, 5) or None,
         )
 
+    @testing.requires.literal_float_coercion
+    def test_float_coerce_round_trip(self, connection):
+        expr = 15.7563
+
+        val = connection.scalar(select(cast(literal(expr), FLOAT)))
+        eq_(val, expr)
+
     @requires.precision_numerics_general
     def test_precision_decimal(self, do_numeric_test):
         """