Zend certified PHP/Magento developer

JSON functions in MBI SQL builder

According to the docs, all functions that are not mutations should be included in the SQL syntax. I have a MySQL integration in MBI, but when I try to test some basic SQL functions such as JSON_EXTRACT() in the SQL terminal, the query errors out.

For example:

SELECT '{"a":1, "b":"stringdata"}'::json AS json

will work both in a regular MySQL terminal and MBI SQL builder

However,

SELECT JSON_EXTRACT('{"a":1, "b":"stringdata"}', "$.b")

Will work in a regular MySQL terminal but not in MBI SQL builder.

How does one get around these discrepancies and is there a definitive list of functions supported by MBI?