public static final Setting<ByteSizeValue> INDICES_CACHE_QUERY_SIZE_SETTING = Setting.memorySizeSetting("indices.queries.cache.size", "10%", Property.NodeScope); // Cache 元素个数上限 public static final Setting<Inte
you want to use case SELECT domain, count(case when status='sent' then 1 else null end) as sent, count(case when status='bounce' then 1 else null end) as bounce, count(case when status='defer' then 1 else null end) as defer FROM yourtablename GROUP BY domain ...
In MySQL, it is advisable to add the level column into the nested sets model which will make it super fast for all three types of queries. However, this will make it even more harder to update. It should also be noted that the only storage engine that allows R-Tree indexes is MyISA...
Bug #114657 BUG REPORT: MySQL 8.0.32+ Crashes when Stored Proc with Nested Queries Does a Co Submitted: 16 Apr 2024 15:42Modified: 17 Apr 2024 10:13 Reporter: Nicholas Othieno (OCA) Email Updates: Status: Duplicate Impact on me: None Category: MySQL ServerSeverity: S2 (Serious) ...
To query the adjacency list, we also need to create a pair of special functions as described in the article abouthierarchical queries inMySQL: The hierarchical functions These functions are described in more detail inthisandthisarticle. Now, let’s run the queries. ...
Bug #27363 nested aggregates in outer, subquery / sum(select count(outer)) Submitted: 21 Mar 2007 22:25Modified: 8 May 2007 1:34 Reporter: Martin Friebe (Gold Quality Contributor) (OCA) Email Updates: Status: Closed Impact on me: None Category: MySQL ServerSeverity: S3 (Non-critical...
In this blog post, we’ll look at nested data structures in ClickHouse for MySQL and how this can be used with PMM to look at queries.
Using MySql driver and writing this: def subQuery(c: CategoriesTable.type) = (for { p <- ProductsTable } yield(p.id.count)) for { c <- CategoriesTable if (c.parentId === 2) } yield(c.id, c.title, (subQuery(c).asColumn)) I expect somethin...
(Beginner) Powershell - getting machine names from a text file and run queries, functions and conditions (Exception has been thrown by the target of an invocation ) in powershell [ADSI] Local Groups Users, Users Type, etc ... [ADSI]::Exists [DateTime]::TryParse is not working for me ...
The postings are stored in a MySQL database (5.0.44, MyISAM) as nested sets. But it seems that my query for fetching the postings/threads for the posting overview (as seen at the page posted above) is not the best one: SELECT p1.PostID, COUNT(*) AS indent, ... ...