[enhancement](delete) Add a hint msg for forbidden delete when MV or …

…rollup exists (#39505)

## Proposed changes

When MV or Rollup exists, delete is forbidden on the base table
currently. Add a hint msg to indicate it.

fe/fe-core/src/main/java/org/apache/doris/catalog/Partition.java

@@ -446,4 +446,8 @@ public void convertHashDistributionToRandomDistribution() {
             distributionInfo = ((HashDistributionInfo) distributionInfo).toRandomDistributionInfo();
         }
     }
+
+    public boolean isRollupIndex(long id) {
+        return idToVisibleRollupIndex.containsKey(id);
+    }
 }

fe/fe-core/src/main/java/org/apache/doris/load/DeleteJob.java

@@ -316,13 +316,17 @@ public void dispatch() throws Exception {
                                 () -> Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER)));
                 for (Predicate condition : deleteConditions) {
                     SlotRef slotRef = (SlotRef) condition.getChild(0);
-                    String columnName = new String(slotRef.getColumnName());
+                    String columnName = slotRef.getColumnName();
                     TColumn column = colNameToColDesc.get(slotRef.getColumnName());
                     if (column == null) {
                         columnName = CreateMaterializedViewStmt.mvColumnBuilder(columnName);
                         column = colNameToColDesc.get(columnName);
                     }
                     if (column == null) {
+                        if (partition.isRollupIndex(index.getId())) {
+                            throw new AnalysisException("If MV or rollup index exists, do not support delete."
+                                    + "Drop existing rollup or MV and try again.");
+                        }
                         throw new AnalysisException(
                                 "condition's column not founded in index, column=" + columnName + " , index=" + index);
                     }