[regression](invered index) add test null index case and fix fault injection index case (#27265)

regression-test/data/inverted_index_p0/test_null_index.out

@@ -0,0 +1,7 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !sql --
+
+-- !sql --
+1	a	\N	[null]	[1]
+
+-- !sql --

regression-test/suites/inverted_index_p0/test_null_index.groovy

@@ -0,0 +1,56 @@
+// 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_null_index", "p0"){
+    // prepare test table
+
+
+    def timeout = 60000
+    def delta_time = 1000
+    def alter_res = "null"
+    def useTime = 0
+
+    def indexTblName = "no_index_test"
+
+    sql "DROP TABLE IF EXISTS ${indexTblName}"
+    // create 1 replica table
+    sql """
+	CREATE TABLE IF NOT EXISTS ${indexTblName}(
+	    `id` int(11) NOT NULL,
+	    `str` string NOT NULL,
+	    `str_null` string NULL,
+            `value` array<text> NOT NULL,
+            `value_int` array<int> NOT NULL
+	) ENGINE=OLAP
+	DUPLICATE KEY(`id`)
+	COMMENT 'OLAP'
+	DISTRIBUTED BY HASH(`id`) BUCKETS 1
+	PROPERTIES(
+ 	    "replication_allocation" = "tag.location.default: 1"
+	);
+    """
+    
+    sql "INSERT INTO $indexTblName VALUES (1, 'a', null, [null], [1]), (2, 'b', 'b', ['b'], [2]), (3, 'c', 'c', ['c'], [3]);"
+    qt_sql "SELECT * FROM $indexTblName WHERE str match null order by id;"
+    qt_sql "SELECT * FROM $indexTblName WHERE str_null match null order by id;"
+    try {
+        qt_sql "SELECT * FROM $indexTblName WHERE value_int element_eq 2;"
+    } catch (Exception e) {
+        assertTrue(e.getMessage().contains("unsupported nested array of type"), e.getMessage())
+    }
+}