Hi, I opened the ticket https://code.djangoproject.com/ticket/3575. In this ticket, I wanted to prove the effect of UPPER function used in icontains operator on indexes and query result. UPPER function causes performance problems regarding indexing in PostgreSQL. Another issue is that it does not give correct results especially for Turkish characters.
Database administrators do not want to add individual indexes in this regard. Because adding more than one index to the same column in full text search will negatively affect cost and performance. An expression index should be created to prevent performance loss in database queries to be used outside the framework. However, the existence of such an index should be notified to everyone who uses this database, and the use of "UPPER (name) ilike '% AA%" instead of "ilike" should be encouraged. This will cause PostgreSQL to block the "ilike" operator. If you give the necessary approval in this regard, I want to open a pull request for the field specified on the ticket. Thanks. -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-developers+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/ba167e5c-49dd-4d96-a2c4-855082639d4en%40googlegroups.com.
