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096b5c5c7a
This patch removes log_position from streaming_context. The log_position was meant for keeping track of the database specific position corresponding to the changes that have been already replicated by a streaming transaction. In reality, things may be more complex in the DBMS side and a size_t may be unsufficient to keep track of the progress of a streaming transaction. For example, in MariaDB, it may be necessary to keep track of positions in both transaction and statement caches. Suggesting that the responsibility of tracking these position(s) should be delegated to client_service. The log_position was also used to do sanity checks in streaming_step(). Those sanity checks are preserved by simply keeping track of the number of bytes that were certified by the streaming transaction.