这两个地方对应的代码是这样的,new HxxxInternalRow(it.asScala.toArray),it是一个java.util.Iterator,这地方为了简便使用了JavaConverters进行转换,再转成数组。虽然简便,但是看得出来还是比较耗CPU的,用麻烦点的方式优化一下, val list = it.next() val numFields = list.size() val array = new Array[An...
To insert an element into a map we can use the member function .insert()member function: #include<iostream>#include<unordered_map>intmain()/*www.java2s.com*/{ std::unordered_map<char,int> myunorderedmap = { {'a', 1}, {'b', 2}, {'c', 5} }; myunorderedmap.insert({'d', ...
// // ins_itr.cpp // #include <iterator> #include <deque> #include <iostream> using namespace std; int main () { // // Initialize a deque using an array. // int arr[4] = { 3,4,7,8 }; deque<int> d(arr+0, arr+4); // // Output the original deque. // cout << "...
// list_insert.cpp // compile with: /EHsc // Shows the various ways to insert elements into a // list<T>. #include <list> #include <iostream> using namespace std ; typedef list<int> LISTINT; int main() { int rgTest1[] = {5,6,7}; int rgTest2[] = {10,11,12}; LISTINT...
The vector is a useful container class of C++ to store the sequence of data that works as a dynamic array. The insert() function is used to add one or more new elements before the specific element of the vector object by mentioning the position of that e
insert /*+append*/ into ...nologing select * from ... 方法二:使用批量拷贝方法 set arraysize 20 set copycommit 5000 copy fromusername/password@oracle_nameappend table_name1 using select * from table_name2; 实际效果,方法一要比方法二速度还要快些 ...
<char8_t, 4096ul, Allocator<false, false>, 63ul, 64ul>::operator[] (this=0x7f4b67123780, n=11) at /data1/liyang/cppproject/kyli/ClickHouse/src/Common/PODArray.h:391 #5 0x000000001b9ead42 in DB::revertNullByteMap (null_bytemap=0x7f4b67123780, start=10, end=12) at /data1/...
#3 COW<DB::IColumn>::immutable_ptr<DB::IColumn> DB::ColumnString::indexImpl<unsigned short>(DB::PODArray<unsigned short, 4096ul, Allocator<false, false>, 63ul, 64ul> const&, unsigned long) const build_tsan/./src/Columns/ColumnString.cpp:285:9 (clickhouse+0x1ff0806f) ...
Creates a new column header with the specified text, key, and width, and inserts the header into the collection at the specified index. Insert(Int32, String, String) Creates a new column header with the specified text and key, and inserts the header into the collection at the specified ...
8)Ifnhis an emptynode handle, does nothing and returns the end iterator. Otherwise, inserts the element owned bynhinto the container, if the container doesn't already contain an element with a key equivalent tonh.key(), and returns the iterator pointing to the element with key equivalent to...