Abstract methods not implemented by dialect

[wiskojo]

I've compiled a list of methods that are abstract but not implemented by the dialect:

In DefaultExecutionContext:

• create_server_side_cursor

In ExecutionContext:

• get_rowcount
• result

In SQLCompiler:

• delete_extra_from_clause
• update_from_clause
• visit_sequence

In Dialect:

• denormalize_name
• do_begin_twophase
• do_commit_twophase
• do_prepare_twophase
• do_recover_twophase
• do_rollback_twophase
• get_check_constraints
• get_isolation_level
• get_primary_keys
• get_table_comment
• get_temp_table_names
• get_temp_view_names
• has_sequence
• set_isolation_level

In SuiteRequirements:

• get_order_by_collation

In TypeEngine (of many types):

• python_type