Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

*: fix incorrect results when handling like with escape #5431

Merged
merged 4 commits into from
Jul 21, 2022
Merged

*: fix incorrect results when handling like with escape #5431

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
f536541
Fix
solotzg Jul 20, 2022
6ccc5e3
Merge branch 'master' into fix-like
solotzg Jul 20, 2022
9445d2b
Merge branch 'master' into fix-like
solotzg Jul 21, 2022
3afdaf6
Merge branch 'master' into fix-like
ti-chi-bot Jul 21, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 6 additions & 9 deletions dbms/src/Storages/Transaction/Collator.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -92,15 +92,12 @@ class Pattern : public ITiDBCollator::IPattern
tp = MatchType::Match;
if (offset < pattern.length())
{
auto old_offset = offset;
c = Collator::decodeChar(pattern.data(), old_offset);
if (c == escape || c == '_' || c == '%')
offset = old_offset;
else
{
assert(escape >= 0);
c = static_cast<decltype(c)>(escape); // NOLINT(bugprone-signed-char-misuse)
}
// use next char to match
c = Collator::decodeChar(pattern.data(), offset);
}
else
{
// use `escape` to match
}
}
else if (c == '_')
Expand Down
27 changes: 26 additions & 1 deletion tests/fullstack-test/expr/like.test
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -38,4 +38,29 @@ mysql> set @@tidb_isolation_read_engines='tiflash'; select * from test.t where '
| a | b |
+------+------+
| aaaa | %a% |
+------+------+
+------+------+

mysql> insert into test.t values ('1234', '');

mysql> set @@tidb_isolation_read_engines='tiflash'; select a from test.t where a like '1234' escape '4';
+------+
| a |
+------+
| 1234 |
+------+

mysql> set @@tidb_isolation_read_engines='tiflash'; select a from test.t where a like '1234' escape '2';

mysql> set @@tidb_isolation_read_engines='tiflash'; select a from test.t where a like '15234' escape '5';
+------+
| a |
+------+
| 1234 |
+------+

mysql> set @@tidb_isolation_read_engines='tiflash'; select a from test.t where a like '_223_' escape '2';
+------+
| a |
+------+
| 1234 |
+------+