imay commented on a change in pull request #697: Optimize decimal by
introducing decimal_v2 (#695)
URL: https://github.com/apache/incubator-doris/pull/697#discussion_r262961507
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File path: be/src/util/string_parser.hpp
##########
@@ -495,6 +500,193 @@ inline int
StringParser::StringParseTraits<__int128>::max_ascii_len() {
return 39;
}
+inline __int128 StringParser::get_scale_multiplier(int scale) {
+ DCHECK_GE(scale, 0);
+ static const __int128 values[] = {
+ static_cast<__int128>(1ll),
+ static_cast<__int128>(10ll),
+ static_cast<__int128>(100ll),
+ static_cast<__int128>(1000ll),
+ static_cast<__int128>(10000ll),
+ static_cast<__int128>(100000ll),
+ static_cast<__int128>(1000000ll),
+ static_cast<__int128>(10000000ll),
+ static_cast<__int128>(100000000ll),
+ static_cast<__int128>(1000000000ll),
+ static_cast<__int128>(10000000000ll),
+ static_cast<__int128>(100000000000ll),
+ static_cast<__int128>(1000000000000ll),
+ static_cast<__int128>(10000000000000ll),
+ static_cast<__int128>(100000000000000ll),
+ static_cast<__int128>(1000000000000000ll),
+ static_cast<__int128>(10000000000000000ll),
+ static_cast<__int128>(100000000000000000ll),
+ static_cast<__int128>(1000000000000000000ll),
+ static_cast<__int128>(1000000000000000000ll) * 10ll,
+ static_cast<__int128>(1000000000000000000ll) * 100ll,
+ static_cast<__int128>(1000000000000000000ll) * 1000ll,
+ static_cast<__int128>(1000000000000000000ll) * 10000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000ll,
+ static_cast<__int128>(1000000000000000000ll) * 1000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 10000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 1000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 10000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 1000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 10000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 1000000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 10000000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll *
10ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll *
100ll,
+ static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll *
1000ll};
+ if (scale >= 0 && scale < 39) return values[scale];
+ return -1; // Overflow
+}
+
+inline __int128 StringParser::string_to_decimal(const char* s, int len,
+ int type_precision, int type_scale, ParseResult* result) {
+ // Special cases:
Review comment:
you should change indent width to 4 spaces
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