Performs several SQL commands on single connection
wrapped in a transaction (BEGIN/COMMIT in PostgreSQL).
Each command should use '$n' notation to refer params
values. Before any command occurs in transaction the
local SQL variables is set from vars.
Performs several SQL commands on single connection wrapped in a transaction (BEGIN/COMMIT in PostgreSQL). Each command should use '$n' notation to refer params values. Before any command occurs in transaction the local SQL variables is set from vars.