[MDEV-23277] Make "for" sentence support JSON arrays Created: 2020-07-23  Updated: 2020-09-14  Resolved: 2020-09-14

Status: Closed
Project: MariaDB Server
Component/s: JSON
Fix Version/s: N/A

Type: Task Priority: Minor
Reporter: Rubén Assignee: Sergei Golubchik
Resolution: Duplicate Votes: 0
Labels: None

Issue Links:
PartOf
is part of MDEV-17399 Add support for JSON_TABLE Closed

 Description   

Hello.

Is it possible to make "for" sentece support JSON arrays? For example:

declare json_string varchar(1024) default '[
 
    {"rdbms":"MySQL/MariaDB","tag":"Rocks!"},
 
    {"rdbms":"Oracle Database","tag":"It\'s fine"},
 
    {"rdbms":"IBM DB2","tag":"Available in z/OS"},
 
    {"rdbms":"Microsoft SQL Server","tag":"No comments"}
 
]';
 
 
 
for rdbms in json_query(json_string, '$') do
 
   -- Do something with current iteration's object.
 
   select json_value(rdbms, '$.rdbms'), json_value(rdbms, '$.tag');
 
end for;

Regards.

 Comments   
Comment by Sergei Golubchik [ 2020-09-14 ]

You'll be able to do it when MDEV-17399 is implemented. Something like

for rdbms in (select ... from json_table(...)) do
 
  ...
 
end for;

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