HappenLee commented on code in PR #39828:
URL: https://github.com/apache/doris/pull/39828#discussion_r1739618332
##########
be/src/vec/functions/function_cast.h:
##########
@@ -1482,6 +1482,43 @@ class PreparedFunctionCast : public PreparedFunctionImpl
{
const char* name;
};
+template <typename FromDataType, typename Name>
+struct ConvertToIPv6 {
+ template <typename Additions = void*>
+ static Status execute(FunctionContext* context, Block& block, const
ColumnNumbers& arguments,
+ size_t result, size_t input_rows_count,
+ Additions additions [[maybe_unused]] = Additions()) {
+ using ColVecTo = ColumnIPv6;
+ const IColumn* col_from =
block.get_by_position(arguments[0]).column.get();
+ if (const auto* col_from_ipv4 =
check_and_get_column<ColumnIPv4>(col_from)) {
+ size_t row = input_rows_count;
+ typename ColVecTo::MutablePtr col_to = ColVecTo::create(row);
+ typename ColVecTo::Container& vec_to = col_to->get_data();
+ const auto& ipv4_column_data = col_from_ipv4->get_data();
+
+ ColumnUInt8::MutablePtr col_null_map_to;
+ ColumnUInt8::Container* vec_null_map_to [[maybe_unused]] = nullptr;
+ col_null_map_to = ColumnUInt8::create(row, 0);
+ vec_null_map_to = &col_null_map_to->get_data();
+ for (size_t i = 0; i < row; ++i) {
+ map_ipv4_to_ipv6(ipv4_column_data[i],
reinterpret_cast<UInt8*>(&vec_to[i]));
+ }
+ block.get_by_position(result).column =
Review Comment:
why ipv4 cast to ipv6 always return nullable？
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