branch-3.1: [fix](inverted index) check policy type when dropping index policy #59132

fe/fe-core/src/main/java/org/apache/doris/indexpolicy/IndexPolicyMgr.java

@@ -349,6 +349,10 @@ public void dropIndexPolicy(boolean isIfExists, String indexPolicyName,
                 }
                 throw new DdlException("index policy " + indexPolicyName + " does not exist");
             }
+            if (policyToDrop.getType() != type) {
+                throw new DdlException("Cannot drop " + policyToDrop.getType() + " policy '"
+                        + indexPolicyName + "' by DROP " + type + " statement.");
+            }
             if (policyToDrop.getType() == IndexPolicyTypeEnum.ANALYZER) {
                 checkAnalyzerNotUsedByIndex(policyToDrop.getName());
             }

regression-test/suites/inverted_index_p0/test_index_policy_drop.groovy

@@ -0,0 +1,36 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+suite("test_index_policy_drop") {
+    def tokenizerName = "test_tokenizer_drop_check"
+
+    // 1. Create a tokenizer policy
+    sql "DROP INVERTED INDEX TOKENIZER IF EXISTS ${tokenizerName}"
+    sql """
+        CREATE INVERTED INDEX TOKENIZER ${tokenizerName}
+        PROPERTIES("type" = "pinyin")
+    """
+
+    // 2. Attempt to drop it using DROP ANALYZER syntax (should fail)
+    test {
+        sql "DROP INVERTED INDEX ANALYZER ${tokenizerName}"
+        exception "Cannot drop TOKENIZER policy '${tokenizerName}' by DROP ANALYZER statement"
+    }
+
+    // 3. Drop it using correct syntax (should succeed)
+    sql "DROP INVERTED INDEX TOKENIZER ${tokenizerName}"
+}