reuvenlax commented on code in PR #28124:
URL: https://github.com/apache/beam/pull/28124#discussion_r1303735533


##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.java:
##########
@@ -3254,9 +3270,12 @@ && getStorageApiTriggeringFrequency(bqOptions) != null) {
       if (getRowMutationInformationFn() != null) {
         checkArgument(getMethod() == Method.STORAGE_API_AT_LEAST_ONCE);
         checkArgument(
-            getCreateDisposition() == CreateDisposition.CREATE_NEVER,
-            "CREATE_IF_NEEDED is not supported when applying row updates. 
Tables must be precreated "
-                + "with a primary key specified.");
+            getCreateDisposition() == CreateDisposition.CREATE_NEVER || 
getPrimaryKey() != null,
+            "If specifying CREATE_IF_NEEDED along with row updates, a primary 
key needs to be specified");
+      }
+      if (getPrimaryKey() != null) {
+        checkArgument(
+            getMethod() != Method.FILE_LOADS, "Primary key not supported when 
using FILE_LOADS");

Review Comment:
   It works with STREAMING_INSERTS. It will create the key with a primary key 
(even though STREAMING_INSERTS itself won't use that primary key for anything).



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