LIKE predicate does not accept a pure column reference as righthand operand (gives ERROR 42824)

Given "create table t (v varchar(32));" the query "select * from t where 'dilldall' like v; " gives ERROR 42824.
The problem is easily bypassed using a cast: "select * from t where 'dilldall' like cast (v as varchar(32));".

create table t (v varchar(32));
insert into t values ('%lda%');
select * from t where 'dilldall' like v; – ERROR 42824: An operand of LIKE is not a string, or the first operand is not a column.
select * from t where 'dilldall' like cast (v as varchar(32)); – 1 row. OK
select * from t where v like 'dilldall'; – 0 rows - OK, not a pattern as right op.
select * from t where cast (v as varchar(32)) like 'dilldall'; – 0 rows - OK, not a pattern as right op.

A column reference as a righthand operand should be accepted according to
ISO/IEC 9075-2:1999 (E):

8.5 <like predicate>
<like predicate> ::=
<character like predicate> | <octet like predicate>
<character like predicate> ::=
<character match value> [ NOT ] LIKE <character pattern> [ ESCAPE <escape character> ]
<character match value> ::= <character value expression>
<character pattern> ::= <character value expression>

6.27 <string value expression>
<character value expression> ::= <concatenation> | <character factor>
<character factor> ::= <character primary> [ <collate clause> ]
<character primary> ::= <value expression primary> | <string value function>

6.23 <value expression>
<value expression primary> ::= <parenthesized value expression> | <nonparenthesized value expression primary>
<nonparenthesized value expression primary> ::= <unsigned value specification> | <column reference> | ....