[GENERAL] Asynchronous queries with bound data.

[Вячеслав Блинников]

Database connection using "libpq":
So, generally speaking, I need:
- send multiple queries using "PQsendQuery()" (or what else)
- bind some data (void*) to each qeury
- obtain results using "PQgetResult()" (or what else) and to know which data
is bound to each result (correspondence between queries and results)
How it can be implemented?