refactor: do some internal refactor.

include/util/tarray.h

@@ -208,6 +208,8 @@ void  taosArrayDestroyP(SArray* pArray, FDelete fp);
 
 void  taosArrayDestroyEx(SArray* pArray, FDelete fp);
 
+void taosArraySwap(SArray* a, SArray* b);
+
 /**
  * sort the array
  * @param pArray

source/util/src/tarray.c

@@ -486,3 +486,21 @@ void taosArraySortPWithExt(SArray* pArray, __ext_compar_fn_t fn, const void* par
   taosArrayGetSize(pArray) > 8 ? taosArrayQuickSort(pArray, fn, param) : taosArrayInsertSort(pArray, fn, param);
 }
 
+void taosArraySwap(SArray* a, SArray* b) {
+  if (a == NULL || b == NULL) return;
+  size_t t = a->size;
+  a->size = b->size;
+  b->size = t;
+
+  uint32_t cap = a->capacity;
+  a->capacity = b->capacity;
+  b->capacity = cap;
+
+  uint32_t elem = a->elemSize;
+  a->elemSize = b->elemSize;
+  b->elemSize = elem;
+
+  void* data = a->pData;
+  a->pData = b->pData;
+  b->pData = data;
+}
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