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Daniel Salazar b5eefaa9cc fix(fs): include supplementary-character names in subtree path queries on MySQL (PUT-2135) (#4198)
* fix(fs): include supplementary-character names in subtree path queries on MySQL (PUT-2135)

MySQL ends the idx_fsentries_path range for `path LIKE 'p/%'` at 'p/' +
U+FFFF, and utf8mb4_unicode_ci sorts supplementary characters above it, so
a child whose name starts with one (most emoji) was skipped with its whole
subtree by listing, delete, copy, rename/move rewrites, counts and sizes.
On MySQL, FSEntryStore now looks up those children by parent_id and ORs a
LIKE pattern for each onto the subtree match, recursing into directories.
Every extra pattern starts with the prefix, so only the scanned ranges
widen; rewrites past 500 patterns run in several statements.

The prefix rewrite also passed a UTF-16 length to SUBSTR, which counts
characters, so a rename under a path holding an emoji dropped characters
from every descendant path on all engines. It now counts code points.

* test(fs): seed the supplementary-name subtree with createNonFileEntry
2026-10-11 21:21:18 -07:00
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