Possible approach for fixing #10574
The problem is that prepared sets are built correctly, it is a hash map of key -> set
where key is a hash of AST and list of data types (when we a list of
tuples of literals).
However, when the key is built from the index to try and find if there
exists a prepared set that would match it looks for data types of the
primary key (see how data_types is populated) because the primary key
has only one field (v in my example) it can not find the prepared set.
The patch looks for any prepared indexes where data types match for the
subset of fields found in primary key, we are not interested in other
fields anyway for the purpose of primary key pruning.
