database/mariadb-columnstore-engine
1
0
Fork 0
mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-07-30 19:23:07 +03:00
Code Activity

MCOL-3536 check for Japanese and use byte compare if found

Browse Source
This commit is contained in:
David Hall
2019-10-14 12:49:08 -05:00
committed by Roman Nozdrin
parent 3b01d5ea22
commit 0d2b0e0070
1 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
utils/windowfunction/idborderby.cpp
View File

@ -134,8 +134,16 @@ int StringCompare::operator()(IdbCompare* l, Row::Pointer r1, Row::Pointer r2)
int len2 = l->row2().getStringLength(fSpec.fIndex);
const char* s1 = (const char*)l->row1().getStringPointer(fSpec.fIndex);
const char* s2 = (const char*)l->row2().getStringPointer(fSpec.fIndex);
const std::collate<char>& coll = std::use_facet<std::collate<char> >(loc);
ret = fSpec.fAsc * coll.compare(s1, s1+len1, s2, s2+len2);
// For Japanese, coll.compare() may not be as correct as strncmp
if (JPcodePoint)
{
ret = fSpec.fAsc * strncmp(s1, s2, max(len1,len2));
}
else
{
const std::collate<char>& coll = std::use_facet<std::collate<char> >(loc);
ret = fSpec.fAsc * coll.compare(s1, s1+len1, s2, s2+len2);
}
}
return ret;