[MySQL (Oracle)] Cannot parse user variable in EXPLAIN INTO

[OnMYLai]

My SQL, copying from MySQL doc with changes of the select sql to sth in my db:
EXPLAIN FORMAT=JSON INTO @myselect SELECT a FROM ab1;
Parsing return error msg line 1:25 mismatched input '@myselect' expecting '@', and unable to parse the 'myselect' as an ID.

the rule for the INTO part:
explainInto
: INTO_SYMBOL AT_SIGN_SYMBOL textOrIdentifier
;
maybe need to recognize AT_TEXT_SUFFIX?

[mike-lischke]

Good find @OnMYLai!