HappenLee commented on code in PR #34258:
URL: https://github.com/apache/doris/pull/34258#discussion_r1596204490
##########
be/src/vec/functions/function_string.h:
##########
@@ -356,6 +357,182 @@ class FunctionStrcmp : public IFunction {
}
};
+class FunctionAutoPartitionName : public IFunction {
+public:
+ static constexpr auto name = "auto_partition_name";
+ static FunctionPtr create() { return
std::make_shared<FunctionAutoPartitionName>(); }
+ String get_name() const override { return name; }
+ size_t get_number_of_arguments() const override { return 0; }
+ bool is_variadic() const override { return true; }
+
+ DataTypePtr get_return_type_impl(const DataTypes& arguments) const
override {
+ return std::make_shared<DataTypeString>();
+ }
+
+ Status execute_impl(FunctionContext* context, Block& block, const
ColumnNumbers& arguments,
+ size_t result, size_t input_rows_count) const override
{
+ DCHECK_GE(arguments.size(), 2);
+
+ int argument_size = arguments.size();
+ std::vector<const ColumnString::Chars*> chars_list(argument_size);
+ std::vector<const ColumnString::Offsets*> offsets_list(argument_size);
+
+ for (int i = 0; i < argument_size; ++i) {
+ const auto& [col, is_const] =
+
unpack_if_const(block.get_by_position(arguments[i]).column);
+
+ const auto* col_str = assert_cast<const ColumnString*>(col.get());
+ chars_list[i] = &col_str->get_chars();
+ offsets_list[i] = &col_str->get_offsets();
+ }
+
+ auto res = ColumnString::create();
+ auto& res_data = res->get_chars();
+ auto& res_offset = res->get_offsets();
+ res_offset.resize(input_rows_count);
+ const char* partition_type = chars_list[0]->raw_data();
+ size_t type_size = chars_list[0]->size();
+ if (std::strncmp(partition_type, "list", 4) == 0 && type_size == 4) {
+ std::string res_p = "p";
+ int curr_size = 0;
+ for (int i = 0; i < input_rows_count; i++) {
+ for (int j = 1; j < argument_size; j++) {
+ const std::string
string_to_unicode(chars_list[j]->raw_data(),
+ chars_list[j]->size());
+ auto unicode_to_string =
string_to_u16string(string_to_unicode);
+ res_p += StringToUnicode(unicode_to_string) +
+ std::to_string(unicode_to_string.size());
+ }
+ int len = res_p.size();
+ if (len > 50) {
+ return Status::Error<ErrorCode::INVALID_ARGUMENT>(
+ "The list partition name cannot exceed 50
characters");
+ }
+ curr_size += len;
+ res_data.resize(curr_size);
+ memcpy(&res_data[res_offset[i - 1]], res_p.c_str(), len);
+ res_offset[i] = res_offset[i - 1] + len;
+ }
+
+ block.get_by_position(result).column = std::move(res);
+ return Status::OK();
+ } else if (std::strncmp(partition_type, "range", 5) == 0 && type_size
== 5) {
+ if (argument_size != 3) {
+ return Status::Error<ErrorCode::INVALID_ARGUMENT>(
+ "The partition type is range, the argument of size
must be 3");
+ }
+
+ const char* range_type = chars_list[1]->raw_data();
+ size_t range_type_size = chars_list[1]->size();
+
+ std::string to_split_s(chars_list[2]->raw_data(),
chars_list[2]->size());
+ std::vector<std::string> str_v;
+ // split date with different way [2022-12-12 00:00:00] or
[2022-12-12]
+ if (to_split_s.size() == input_rows_count * 19) {
+ for (int i = 0; i < to_split_s.size(); i += 19) {
+ auto vec_res = split(to_split_s.substr(i, 10), "-");
+ for (const auto& s : vec_res) {
+ str_v.emplace_back(s);
+ }
+ }
+ } else {
+ for (int i = 0; i < to_split_s.size(); i += 10) {
+ auto vec_res = split(to_split_s.substr(i, 10), "-");
+ for (const auto& s : vec_res) {
+ str_v.emplace_back(s);
+ }
+ }
+ }
+ if (str_v.size() != 3 * input_rows_count) {
+ return Status::Error<ErrorCode::INVALID_ARGUMENT>(
+ "The range partition only support DATE/DATETIME");
+ }
+ res_data.resize(15 * input_rows_count);
+ for (int i = 0; i < input_rows_count; i++) {
+ int curr_len = 1;
+
+ res_data[res_offset[i - 1]] = 'p';
+
+ if (std::strncmp(range_type, "day", 3) == 0 && range_type_size
== 3) {
+ for (int j = i * 3; j < i * 3 + 3; j++) {
+ memcpy(&res_data[res_offset[i - 1]] + curr_len,
str_v[j].c_str(),
+ str_v[j].size());
+ curr_len += str_v[j].size();
+ }
+ } else if (std::strncmp(range_type, "month", 5) == 0 &&
range_type_size == 5) {
+ for (int j = i * 3; j < i * 3 + 2; j++) {
+ memcpy(&res_data[res_offset[i - 1]] + curr_len,
str_v[j].c_str(),
+ str_v[j].size());
+ curr_len += str_v[j].size();
+ }
+ memcpy(&res_data[res_offset[i - 1]] + curr_len, "01", 2);
+ curr_len += 2;
+ } else if (std::strncmp(range_type, "year", 4) == 0 &&
range_type_size == 4) {
+ memcpy(&res_data[res_offset[i - 1]] + curr_len, str_v[i *
3].c_str(),
+ str_v[i * 3].size());
+ curr_len += str_v[i * 3].size();
+ memcpy(&res_data[res_offset[i - 1]] + curr_len, "0101", 4);
+ curr_len += 4;
+ } else {
+ return Status::Error<ErrorCode::INVALID_ARGUMENT>(
+ "The first argument is range, the second argument
muse be "
+ "day, month or year ");
+ }
+ memcpy(&res_data[res_offset[i - 1]] + curr_len, "000000", 6);
+ curr_len += 6;
+ res_offset[i] = res_offset[i - 1] + curr_len;
+ }
+
+ block.get_by_position(result).column = std::move(res);
+ return Status::OK();
+ } else {
+ return Status::Error<ErrorCode::INVALID_ARGUMENT>(
+ "Partition type must be range or list");
+ }
+
+ return Status::OK();
+ }
+
+private:
+ std::u16string string_to_u16string(const std::string& str) const {
+ std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t>
convert;
+ return convert.from_bytes(str);
+ }
+
+ std::string StringToUnicode(const std::u16string& s) const {
Review Comment:
_string_to_unicode
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