I want to setup multi-level index in my firebase realtime database. My database structure looks like this, in which the root key name is jobOpenings which contains child of job opening id (for instance particularJobId) which is going to contain…
My partial index in PostgreSQL 14: CREATE INDEX idx_invoice_account_id ON invoice (account_id) WHERE NOT "is_deleted"; Every invoice row starts with is_deleted = false before 50% of them get deleted (is_deleted = true). Does PostgreSQL remove it from index? If not,…
Hi i was reading postgres indexes, trying find a solution to make gin operator work with like on array. Let me explain. I have a need to find a range of unique keys. This is not that simple, because i…
i'm having a little problem, trying to optimaze quering data from a unstructured json field. By unstructured i mean, each json field is unique on each row. by using this query, i want to collect all the keys which are…
When only cluster key and idx_price exist as indexes.. Query: select id , name from product where price < 20000 Explane: detail value id 1 select_type SIMPLE table product partitions NULL type range possible_keys idx_price key idx_price key_len 9 ref…
I have a table CREATE TABLE cities ( id serial, name character varying(30) ); Then, some rows were added. In order to make the queries faster, an index was defined: CREATE INDEX cities_name_idx ON cities (name); SET enable_seqscan TO off;…
Refer to this document explain.executionStats.totalKeysExamined Number of index entries scanned. totalKeysExamined corresponds to the nscanned field returned by cursor.explain() in earlier versions of MongoDB. explain.executionStats.totalDocsExamined Number of documents examined during query execution. Common query execution stages that examine documents are…
I am encountering an issue with atomic updates in my Solr core while using a batch processing python script. The script sends data in batches of 10000 documents to the Solr core for atomic updates, but I'm facing a problem…
I want to understand how index is created in MySQL - meaning if its a TimeStamp field - will it create a hash of the TimeStamp field and store it or just store the literal Value of the timestamp. Since…
I am trying to enable a variety of queries in an app using Firestore, and I recently had to add several composite indexes to allow them to work. But I am noticing a lot of overlap in the queries and…