Macro create_hashes_internal

macro_rules! create_hashes_internal {
    ($arrays: ident, $hashes_buffer: ident, $hash_method: ident, $create_dictionary_hash_method: ident) => { ... };
}

Creates hash values for every row, based on the values in the columns.

The number of rows to hash is determined by hashes_buffer.len(). hashes_buffer should be pre-sized appropriately

hash_method is the hash function to use. create_dictionary_hash_method is the function to create hashes for dictionary arrays input.