Consider we have A,B,C,D,E,F,G,H columns in my table and if I make composite indexing on column ABCDE because these column are coming in where clause and then I want composite indexing on ABCEF then I create new composite indexing on…
currently I'm struggeling with PostgreSQL 11, JSONB and database indices. We have a customers table (shortened): create table public.customers ( id uuid not null, created timestamp without time zone, lastmodified timestamp without time zone, data jsonb, primary key (id, mandantid)…
I have a table with b-tree index on column A (non-unique). Now I want to add a check for uniqueness of column A and column B combination when inserting, so I want to add a unique composite index (A, B).…
I've created a table with an full-text index over 2 columns: CREATE TABLE players ( id int NOT NULL, first_name varchar(25) NOT NULL, last_name varchar(25) NOT NULL, team_id int NOT NULL, PRIMARY KEY (id), FULLTEXT INDEX full_text_pname (first_name, last_name), CONSTRAINT…
I have a large MySQL table with 20mm records of sales and 10 or so columns. Two of the columns are POSTCODE and STREET. I have configured the table so that i have a FULLTEXT index defined on these 2…
I'm using opencart v3.0.2.0, the issue is that the index.php file of opencart which is the entry point of my opencart website and is uploaded in public_html directory currupts(the code in index.php file changes to strange characters). It happened twice…
10 million rows. MySQL server V. 5.7 Two indexes called "tagline" and "experience". This statement takes < 1 second: SELECT count(*) FROM pa WHERE MATCH(tagline) AGAINST('"developer"' IN BOOLEAN MODE); This statement also takes < 1 second: SELECT count(*) FROM pa…
I have following Postgres query that runs over a large table and whenever it does, I observe a high CPU load that reaches 100% : SELECT id, user_id, type FROM table ss WHERE end_timestamp > CURRENT_TIMESTAMP AND (notification_channel1 = true…
Hey stack overflow legends, I'm trying to extract a dataframe from a nested list within a nested list, and it feels like I'm stuck in some kind of Inception-like dream within a dream. These lists are just nesting inside each…
I have just read the documentation for Firestore indexing and now I have the following questions to make sure that I understood the concept correctly : Assume that I have the following data structure: { "user_collection": { "user1_document":{ "name": "Joe",…