How to parse a string and get the value after "=" character - mysql

Question

So I have string that should contains "Object.Name" once in a row , if I see it ,I have to get the value after "=" character. If doesn't match it anywhere in the string i should move hardcoded value.
Here is example of the string:
Object.Name=ASDD||Product.Name=DSA
Product.Name=QWE||Object.Name=WSXS
Storage.Name=12345||Object.Name=WERR||Product.Name=QAZ
I know that I should use case for that but doesn't know how to proceed the string
case
when (match the string ) then (value after the "=")
else (hardcoded value)
end

Answer 1

In Oracle, you can use:
SELECT value,
CASE
WHEN start_pos = 0
THEN NULL
ELSE SUBSTR(
'||' || value || '||',
start_pos + LENGTH('||Object.Name='),
end_pos - start_pos - LENGTH('||Object.Name=')
)
END AS object_name
FROM (
SELECT value,
INSTR(
'||' || value || '||',
'||Object.Name='
) AS start_pos,
INSTR(
'||' || value || '||',
'||',
INSTR('||' || value || '||', '||Object.Name=')+LENGTH('||Object.Name=')
) AS end_pos
FROM table_name
)
Which, for the sample data:
CREATE TABLE table_name (value) AS
SELECT 'Object.Name=ASDD||Product.Name=DSA' FROM DUAL UNION ALL
SELECT 'Product.Name=QWE||Object.Name=WSXS' FROM DUAL UNION ALL
SELECT 'Storage.Name=12345||Object.Name=WERR||Product.Name=QAZ' FROM DUAL;
Outputs:
VALUE
OBJECT_NAME
Object.Name=ASDD||Product.Name=DSA
ASDD
Product.Name=QWE||Object.Name=WSXS
WSXS
Storage.Name=12345||Object.Name=WERR||Product.Name=QAZ
WERR
db<>fiddle here
Since you changed the tags, in MySQL:
SELECT value,
CASE
WHEN start_pos = 0
THEN NULL
ELSE SUBSTRING(
CONCAT('||', value, '||'),
start_pos + LENGTH('||Object.Name='),
end_pos - start_pos - LENGTH('||Object.Name=')
)
END AS object_name
FROM (
SELECT value,
LOCATE(
'||Object.Name=',
CONCAT('||', value, '||')
) AS start_pos,
LOCATE(
'||',
CONCAT('||', value, '||'),
LOCATE('||Object.Name=', CONCAT('||', value, '||'))
+ LENGTH('||Object.Name=')
) AS end_pos
FROM table_name
) t
db<>fiddle here