-
Notifications
You must be signed in to change notification settings - Fork 410
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
219 additions
and
12 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| #pragma once | ||
|
|
||
| #include <Core/Field.h> | ||
| #include <Core/Types.h> | ||
| #include <common/DateLUT.h> | ||
| #include <cctype> | ||
| #include <initializer_list> | ||
| #include <vector> | ||
|
|
||
| #include <Storages/Transaction/TiDB.h> | ||
| #include <Poco/StringTokenizer.h> | ||
|
|
||
| namespace DB | ||
| { | ||
|
|
||
| int adjustYear(int year) | ||
| { | ||
| if (year >= 0 && year <= 69) | ||
| return 2000 + year; | ||
| if (year >= 70 && year <= 99) | ||
| return 1900 + year; | ||
| return year; | ||
| } | ||
|
|
||
| void scanTimeArgs(const std::vector<String> & seps, std::initializer_list<int *> && list) | ||
| { | ||
| int i = 0; | ||
| for (auto * ptr : list) | ||
| { | ||
| *ptr = std::stoi(seps[i]); | ||
| i++; | ||
| } | ||
| } | ||
|
|
||
| int getFracIndex(const String & format) | ||
| { | ||
| int idx = -1; | ||
| for (int i = int(format.size()) - 1; i >= 0; i--) | ||
| { | ||
| if (std::ispunct(format[i])) | ||
| { | ||
| if (format[i] == '.') | ||
| { | ||
| idx = i; | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| return idx; | ||
| } | ||
|
|
||
| std::vector<String> parseDateFormat(String format) | ||
| { | ||
| format = Poco::trimInPlace(format); | ||
|
|
||
| std::vector<String> seps; | ||
| size_t start = 0; | ||
| for (size_t i = 0; i < format.size(); i++) | ||
| { | ||
| if (i == 0 || i + 1 == format.size()) | ||
| { | ||
| if (!std::isdigit(format[i])) | ||
| return {}; | ||
| continue; | ||
| } | ||
|
|
||
| if (!std::isdigit(format[i])) | ||
| { | ||
| if (!std::isdigit(format[i - 1])) | ||
| return {}; | ||
| seps.push_back(format.substr(start, i - start)); | ||
| start = i + 1; | ||
| } | ||
| } | ||
| seps.push_back(format.substr(start)); | ||
| return seps; | ||
| } | ||
|
|
||
| std::vector<String> splitDatetime(String format) | ||
| { | ||
| int idx = getFracIndex(format); | ||
| if (idx > 0) | ||
| { | ||
| format = format.substr(0, idx); | ||
| } | ||
| return parseDateFormat(format); | ||
| } | ||
|
|
||
| Field parseMyDatetime(const String & str) | ||
| { | ||
| Int32 year = 0, month = 0, day = 0, hour = 0, minute = 0, second = 0; | ||
|
|
||
| const auto & seps = splitDatetime(str); | ||
|
|
||
| switch (seps.size()) | ||
| { | ||
| // No delimiter | ||
| case 1: | ||
| { | ||
| size_t l = seps[0].size(); | ||
| switch (l) | ||
| { | ||
| case 14: | ||
| // YYYYMMDDHHMMSS | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%4d%2d%2d%2d%2d%2d", &year, &month, &day, &hour, &minute, &second); | ||
| break; | ||
| } | ||
| case 12: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%2d%2d%2d%2d%2d%2d", &year, &month, &day, &hour, &minute, &second); | ||
| year = adjustYear(year); | ||
| break; | ||
| } | ||
| case 11: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%2d%2d%2d%2d%2d%1d", &year, &month, &day, &hour, &minute, &second); | ||
| year = adjustYear(year); | ||
| break; | ||
| } | ||
| case 10: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%2d%2d%2d%2d%2d", &year, &month, &day, &hour, &minute); | ||
| year = adjustYear(year); | ||
| break; | ||
| } | ||
| case 9: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%2d%2d%2d%2d%1d", &year, &month, &day, &hour, &minute); | ||
| year = adjustYear(year); | ||
| break; | ||
| } | ||
| case 8: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%4d%2d%2d", &year, &month, &day); | ||
| break; | ||
| } | ||
| case 6: | ||
| case 5: | ||
| { | ||
| std::sscanf(seps[0].c_str(), "%2d%2d%2d", &year, &month, &day); | ||
| year = adjustYear(year); | ||
| break; | ||
| } | ||
| default: | ||
| { | ||
| throw Exception("Wrong datetime format"); | ||
| } | ||
| // TODO Process frac! | ||
| } | ||
| break; | ||
| } | ||
| case 3: | ||
| { | ||
| scanTimeArgs(seps, {&year, &month, &day}); | ||
| break; | ||
| } | ||
| case 6: | ||
| { | ||
| scanTimeArgs(seps, {&year, &month, &day, &hour, &minute, &second}); | ||
| break; | ||
| } | ||
| default: | ||
| { | ||
| throw Exception("Wrong datetime format"); | ||
| } | ||
| } | ||
|
|
||
| UInt64 ymd = ((year * 13 + month) << 5) | day; | ||
| UInt64 hms = (hour << 12) | (minute << 6) | second; | ||
| return Field((ymd << 17 | hms) << 24); | ||
| } | ||
|
|
||
| } // namespace DB |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters