fix fts query bugs

Author: GroundWu

src/main/java/com/alipay/oceanbase/rpc/table/ObTableClientQueryImpl.java

@@ -174,6 +174,11 @@ private AbstractQueryStreamResult commonExecute(InitQueryResultCallback<Abstract
             // Currently, fulltext query only support scan all partitions
             tableQuery.getKeyRanges().clear();
             tableQuery.addKeyRange(ObNewRange.getWholeRange());
+            if (tableQuery.getIndexName() == null || tableQuery.getIndexName().isEmpty()
+                    || tableQuery.getIndexName().equalsIgnoreCase("primary")) {
+                throw new IllegalArgumentException(
+                        "use fulltext search but specified index name is not fulltext index");
+            }
         }
 
         // init partitionObTables