Search MySQL JSON field on any index - mysql

Question

I have a specific json structure
{
"id:":"123456",
"elements":[
{
"name":"test1",
"txt":"random1"
},
{
"name":"test2",
"txt":"random2"
},
{
"name":"test3",
"tx3":"random3"
},
etc...
]
}
This is my current query that checks only on specific index:
select column->>'$.id' as m FROM table WHERE column->>'$.elements[0].name' = 'test1'
I would like to check whether any of the elements has the name i am looking for. Something like elements[*].name = 'test1'
Additional:
Is there an option to return all elements text, where element has specific name?
For example:
select <elements:txt> where <elements:name> = 'test1'

Answer 1

You can use JSON_SEARCH, checking to see if it returns NULL (no match) when looking for the string in each of the element names:
SELECT column->>'$.id' AS m
FROM table
WHERE JSON_SEARCH(column, 'one', 'test1', NULL, '$.elements.*.name') IS NOT NULL
If elements is actually an array, you would change the query to:
SELECT column->>'$.id' AS m
FROM table
WHERE JSON_SEARCH(column, 'one', 'test1', NULL, '$.elements[*].name') IS NOT NULL
Demo on dbfiddle
To extract the matching txt value requires hacking the path returned from JSON_SEARCH, replacing the .name part with .txt and then passing that to JSON_EXTRACT:
SELECT JSON_EXTRACT(j, REPLACE(JSON_UNQUOTE(JSON_SEARCH(j, 'one', 'test2', NULL, '$.elements[*].name')), '.name', '.txt')) AS txt
FROM test
WHERE JSON_SEARCH(j, 'one', 'test2', NULL, '$.elements[*].name') IS NOT NULL
Demo on dbfiddle