Fix clear filter mistakenly in filter IN pushdown.

src/sql/engine/basic/ob_pushdown_filter.cpp

@@ -2706,10 +2706,7 @@ void PushdownFilterInfo::reset()
     }
     allocator_ = nullptr;
   }
-  if (OB_NOT_NULL(filter_)) {
-    filter_->clear();
-    filter_ = nullptr;
-  }
+  filter_ = nullptr;
   param_ = nullptr;
   context_ = nullptr;
   is_inited_ = false;

src/sql/engine/basic/ob_pushdown_filter.h

@@ -903,7 +903,7 @@ public:
   virtual void clear_in_datums()
   {
     if (WHITE_OP_IN == filter_.get_op_type()) {
-      datum_params_.reset();
+      datum_params_.clear();
       param_set_.destroy();
     }
   }

src/storage/access/ob_table_access_param.cpp

@@ -60,6 +60,11 @@ ObTableIterParam::ObTableIterParam()
 ObTableIterParam::~ObTableIterParam()
 {
   cg_read_info_handle_.reset();
+  if (nullptr != pushdown_filter_) {
+    pushdown_filter_->clear();
+    pushdown_filter_ = nullptr;
+  }
+  ObSSTableIndexFilterFactory::destroy_sstable_index_filter(sstable_index_filter_);
 }
 
 void ObTableIterParam::reset()
@@ -79,7 +84,10 @@ void ObTableIterParam::reset()
   need_trans_info_ = false;
   is_same_schema_column_ = false;
   pd_storage_flag_ = 0;
-  pushdown_filter_ = nullptr;
+  if (nullptr != pushdown_filter_) {
+    pushdown_filter_->clear();
+    pushdown_filter_ = nullptr;
+  }
   ss_rowkey_prefix_cnt_ = 0;
   op_ = nullptr;
   output_exprs_ = nullptr;

src/storage/blocksstable/cs_encoding/ob_dict_column_decoder.cpp

@@ -1110,7 +1110,9 @@ int ObDictColumnDecoder::datum_dict_val_in_op(
 
   bool hit_shortcut = false;
   int cmp_ret = 0;
-  if (is_sorted_dict) {
+  if (filter.null_param_contained()) {
+    hit_shortcut = true;
+  } else if (is_sorted_dict) {
     if (OB_FAIL(filter.cmp_func_(*min_it, filter.get_max_param(), cmp_ret))) {
       LOG_WARN("Failed to compare min dict value and max param", KR(ret), K(*min_it), K(filter.get_max_param()));
     } else if (cmp_ret > 0) {