dataroaring commented on code in PR #50489:
URL: https://github.com/apache/doris/pull/50489#discussion_r2062863875


##########
fe/fe-core/src/main/java/org/apache/doris/catalog/ListPartitionInfo.java:
##########
@@ -207,21 +207,27 @@ public String toSql(OlapTable table, List<Long> 
partitionId) {
             String partitionName = partition.getName();
             List<PartitionKey> partitionKeys = entry.getValue().getItems();
 
-            sb.append("PARTITION ").append(partitionName).append(" VALUES IN 
");
-            sb.append("(");
+            sb.append("PARTITION ").append(partitionName);
+            StringBuilder partitionKeysBuilder = new StringBuilder();
             int idxInternal = 0;
             for (PartitionKey partitionKey : partitionKeys) {
                 String partitionKeyStr = partitionKey.toSql();
-                if (!isMultiColumnPartition) {
+                if (!isMultiColumnPartition && !partitionKeyStr.isEmpty()) {
                     partitionKeyStr = partitionKeyStr.substring(1, 
partitionKeyStr.length() - 1);
                 }
-                sb.append(partitionKeyStr);
+                partitionKeysBuilder.append(partitionKeyStr);
                 if (partitionKeys.size() > 1 && idxInternal != 
partitionKeys.size() - 1) {
-                    sb.append(",");
+                    partitionKeysBuilder.append(",");
                 }
                 idxInternal++;
             }
-            sb.append(")");
+
+            // length == 0 means it is a default partition
+            if (partitionKeysBuilder.length() > 0) {
+                sb.append(" VALUES IN ").append("(");
+                sb.append(partitionKeysBuilder.toString());
+                sb.append(")");

Review Comment:
   Please add regression test.



##########
fe/fe-core/src/main/java/org/apache/doris/catalog/ListPartitionInfo.java:
##########
@@ -207,21 +207,27 @@ public String toSql(OlapTable table, List<Long> 
partitionId) {
             String partitionName = partition.getName();
             List<PartitionKey> partitionKeys = entry.getValue().getItems();
 
-            sb.append("PARTITION ").append(partitionName).append(" VALUES IN 
");
-            sb.append("(");
+            sb.append("PARTITION ").append(partitionName);
+            StringBuilder partitionKeysBuilder = new StringBuilder();
             int idxInternal = 0;
             for (PartitionKey partitionKey : partitionKeys) {
                 String partitionKeyStr = partitionKey.toSql();
-                if (!isMultiColumnPartition) {
+                if (!isMultiColumnPartition && !partitionKeyStr.isEmpty()) {
                     partitionKeyStr = partitionKeyStr.substring(1, 
partitionKeyStr.length() - 1);
                 }
-                sb.append(partitionKeyStr);
+                partitionKeysBuilder.append(partitionKeyStr);
                 if (partitionKeys.size() > 1 && idxInternal != 
partitionKeys.size() - 1) {
-                    sb.append(",");
+                    partitionKeysBuilder.append(",");
                 }
                 idxInternal++;
             }
-            sb.append(")");
+
+            // length == 0 means it is a default partition
+            if (partitionKeysBuilder.length() > 0) {
+                sb.append(" VALUES IN ").append("(");
+                sb.append(partitionKeysBuilder.toString());
+                sb.append(")");

Review Comment:
   Please add regression test.



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