Polber commented on code in PR #31987:
URL: https://github.com/apache/beam/pull/31987#discussion_r1731932870


##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerReadSchemaTransformProvider.java:
##########
@@ -159,13 +159,13 @@ public void validate() {
         checkNotNull(this.getColumns(), invalidConfigMessage + "Columns must 
be specified for table read.");
       }
       else {
-        checkNotNull(this.getQuery(), invalidConfigMessage + "Query must be 
specified for query read.");
+        checkNotNull(Strings.isNullOrEmpty(this.getQuery()), 
invalidConfigMessage + "Query must be specified for query read.");

Review Comment:
   This will never fail since `Strings.isNullOrEmpty(this.getQuery())` is a 
boolean (never null)
   ```suggestion
           checkNotNull(Strings.isNullOrEmpty(this.getQuery()), 
invalidConfigMessage + "Query must be specified for query read.");
   ```
   ```suggestion
           checkArgument(
             Strings.isNullOrEmpty(this.getQuery()),
             invalidConfigMessage + "Query must be specified for query read."
           );
   ```



##########
sdks/python/apache_beam/yaml/integration_tests.py:
##########
@@ -37,14 +37,33 @@
 from apache_beam.utils import python_callable
 from apache_beam.yaml import yaml_provider
 from apache_beam.yaml import yaml_transform
-
+from apache_beam.io.gcp.spanner_wrapper import SpannerWrapper
 
 @contextlib.contextmanager
 def gcs_temp_dir(bucket):
   gcs_tempdir = bucket + '/yaml-' + str(uuid.uuid4())
   yield gcs_tempdir
   filesystems.FileSystems.delete([gcs_tempdir])
 
+import contextlib
+import uuid
+import logging
+from google.cloud import spanner
+
[email protected]
+def temp_spanner_table(project, prefix = 'temp_spanner_db_'):
+    spanner_client = SpannerWrapper(project)
+    spanner_client._create_database()
+    instance = 'beam-test'
+    database = spanner_client.TEST_DATABASE
+    table = 'Users'

Review Comment:
   ```suggestion
       table = 'tmp_table'
   ```



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