Mryange opened a new pull request, #40679:
URL: https://github.com/apache/doris/pull/40679
## Proposed changes
Previously, get_char_len was repeatedly traversed during execution. Now, it
is precomputed for optimization.
```C++
static int execute(const StringRef& strl, const StringRef& strr) {
if (strr.size == 0) {
return 1;
}
StringSearch search(&strr);
// Hive returns positions starting from 1.
int loc = search.search(&strl);
if (loc > 0) {
size_t len = std::min((size_t)loc, strl.size);
loc = simd::VStringFunctions::get_char_len(strl.data, len);
}
return loc + 1;
}
```
Issue Number: close #xxx
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