Oracle's OCI8 driver binds each named parameter individually via
OCIBindByName, making queries with 65 000 parameters dramatically
slower than on MySQL or PostgreSQL — slow enough to time out in CI
and degrade production LDAP syncs on large installations.
Lower maxSlices to 5 for Oracle (5 000 params/query) via a match
expression alongside the existing SQLite special-case. SQLite and
all other databases are unchanged.
Assisted-by: ClaudeCode:claude-sonnet-4-6
Signed-off-by: Anna Larch <anna@nextcloud.com>
Reduce mapped entries from 3332 to 14 (every 5000th instead of every
20th) so the test exercises the chunking path without inserting thousands
of rows. Move the explanatory comment above the loop where it belongs.
Note: the implementation chunks at its own 65000 total-parameter limit
(not Postgres's 65535 IN-list limit), so the comment uses 65000.
Signed-off-by: Anna Larch <anna@nextcloud.com>
AI-Assisted-By: Claude Sonnet 4.6 <noreply@anthropic.com>
