fix

Author: JingsongLi

paimon-spark/paimon-spark-common/src/main/scala/org/apache/paimon/spark/commands/PaimonSparkWriter.scala

@@ -236,14 +236,11 @@ case class PaimonSparkWriter(table: FileStoreTable) {
           )
         }
 
-      case BUCKET_UNAWARE =>
-        // Topology: input ->
+      case BUCKET_UNAWARE | POSTPONE_MODE =>
         writeWithoutBucket(data)
 
       case HASH_FIXED =>
-        if (table.bucketSpec().getNumBuckets == POSTPONE_BUCKET) {
-          writeWithoutBucket(data)
-        } else if (paimonExtensionEnabled && BucketFunction.supportsTable(table)) {
+        if (paimonExtensionEnabled && BucketFunction.supportsTable(table)) {
           // Topology: input -> shuffle by partition & bucket
           val bucketNumber = table.coreOptions().bucket()
           val bucketKeyCol = tableSchema