I need to display a very large collection of elements (images from files) in a ListView, using the usual ListView.builder constructor. I statically know the size of each element so, technically, I know also the total height of the list…
This is a WordPress with Woocommerce project. I have to loop an array with more than 200 thousand of items. Every item is an order's ID in the data base. I have to sum the value of every order's meta…
I'm building a table that will have several filters. Thus far, I've been able to build two filters that work in tandem. The filter values come from dropdown like this (I haven't included "Org Type" as a filter yet: Here…
I've got a production database with a wp_options table reportedly totalling around 951,679,500,288 (900GB+) in total data length. However, when I export the database and examine it locally it only reports a small number of MB (usually 3-7MB). There are…
Previously I had a post about a query that loads very long due to queries. I was advised to use microtime() to check the parts which loads long. Unfortunately, I was not able to find any problem since everything is…
I'm practicing with queries optimization. In particular, tuning work_mem parameter. There's the DB diagram: https://postgrespro.com/docs/postgrespro/12/apks02. I have a sql function get_passengers_and_flights: CREATE FUNCTION get_passengers_and_flights(d timestamptz) RETURNS TABLE(passenger_name text, flight_no text) AS $$ SELECT t.passenger_name, f.flight_no FROM tickets t JOIN ticket_flights…
Let's say I have a table that has 3 fields: (id, name, points). Now initially I want to order them by points and also get the position. So here's my current query that does this: SELECT id, name, points, ROW_NUMBER()…
I checked other questions with the same issue, But they seem not to have a primary key or the number of rows to examine is low which lets MySQL decides not to use an index. In my case it is…
I have a form with multiple posts. User has the option to comment on one post and submit or comment on multiple posts and submit. The problem which I'm facing is that I have just one API to save user…
Background I’m trying to create a mask using two UIView with the below code. Masking works, but not in the way that I was intending, images below. I’m trying to get masking to work like Image A, but I’m getting…