I need help optimize below postgresql query. Currently its taking more than 3 min to get the data , due to that my API got timeout ,can you please help me to get the result set within 59 seconds. Thanks…
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…
what does means ref=const,const in mysql explain statment? i add index for the table and the index contains tow columns where statment contains two index columns and some not in index columns why does the explain statment extra column show…
Hi I have a database with 10 tables. each table has ~0.5-1 billion rows, and partitioned by range and then hash (10x10=100 partitions). they are newly created tables, and import data from csv files. they are indexed on the column…
Here's my query: SELECT COUNT(1) FROM nhd WHERE gnis_id IN (01372336); The table definition has an INDEX gnis_id (gnis_id) on it and, indeed, that index is used with this query. BUT when I replace the COUNT(1) with * the index…
I read about MySQL EXPLAIN safety in the StackOverflow question about it, and one of the later commenters (@tye) said: people figuring out how to make updates via "explain" It's a question that I've been thinking about today -- is…
In the shared plan index scan cost is very high (cost=0.56..696715.50 But Limit (cost=0.56..224.59 is very low and so on result cost Result (cost=224.59..224.60 rows=1 width=8) why it is so? Right now I will consider this query harmless as it…
Example at Oracle: explain plan for select * from sample_table where column_name = :1 This will return query plan with detailed steps and cost in a tabular form. Example at PostgreSQL explain (format yaml) select * from sample_table where column_name…
Case Inputs Mysql Version on both Prod and test: 5.7 Query: SELECT t1.id t1.accountId, t2.col1 FROM table1 t1 INNER JOIN table2 t2 ON (t2.Id = t1.id) WHERE 1 AND MOD(t1.id, 20) = 0 AND t1.col1 = 0 AND t1.col2 <=…
I need help for performance this query SELECT * FROM transactions WHERE created_at BETWEEN '2022-08-25 01:03:21' AND '2022-12-13 01:03:21' AND ((transaction_reason IN ('ORIGINAL','REVERSAL_OF_ADJUSTMENT') AND type = 'DEPOSIT') OR (transaction_reason IN ('ADJUSTMENT','REVERSAL_OF_ORIGINAL') AND type = 'WITHDRAWAL') ) ORDER BY transaction_id ASC…