Friday, February 26, 2021

Searching JSON Data

 A post on the MySQL forums caught my eye today. The distilled question was why was an index not being used to search JSON data.  The poster (in blue) had done most of the steps needed almost correctly but just missed the crucial steps. 

Suppose we have this table with an index on a virtual generated column as JSON attribute index pattern

CREATE TABLE applications (
CREATE INDEX idx ON applications ((CAST(data->>"$.name" AS CHAR(10))));

Friday, February 5, 2021

MySQL & Friends FOSDEM Dev Room

 FOSDEM has become one of the biggest shows on the calendar of the MySQL Community Team.  FOSDEM itself, until this year, is barely contained chaos at a university in Brussels with no pre-enrollment for any of the dozens of themed rooms and no head count.  This year the event is virtual so you do not have to get to Belgium.

The MySQL and Friends Developer Room is Sunday and starts at 10:00am  Belgium time with a retrospective of the first twenty five years of MySQL. This is followed 15 other talks of about 25 minutes on everything from ARM to user management. 

25 years of MySQL – A RetrospectiveDave Stokes10:0010:20
Open Source Database Infrastructure with VitessShlomi Noach10:3010:55
From single MySQL instance to HA
The journey to InnoDB Cluster
Frédéric Descamps11:0011:25
Group Replication: Best Practices for Network DeployAníbal Pinto11:3011:55
Review of the Percona Operator from a DBA prospectiveMarco Tusa (the Grinch)12:0012:25
MySQL Router REST APIFrédéric Descamps12:3012:55

Better User Management under MySQL 8.0
Dave Stokes13:0013:25
Running MySQL on ARMKrunal Bauskar13:3013:55
Making MySQL-8.0 XA transaction processing crash safe
The key to use MySQL as storage nodes for distributed databases
Wei Zhao14:0014:25
Passing query attributes through the MySQL protocol
Extension to the wire format to allow data/metadata
Joro Kodinov14:3014:55
Linux /proc filesystem for MySQL DBAs
Sampling /proc content for troubleshooting
Valerii Kravchuk15:0015:20
Rewrite Your Complex MySQL Queries for Better PerformanceØystein Grøvlen15:3015:55
Automatic Asynchronous Replication Connection FailoverHemant Dangi16:0016:25
Sure you can run your database in kubernetes
Successfully run your MySQL NDB Cluster in kubernetes
Bernd Ocklin16:3016:55
18 Things To Do When You Have a MySQL BottleneckPeter Zaitsev17:0017:25
Hitchhiker’s Guide to MySQL
Don’t panic.
Liz van Dijk17:3017:55