Added transaction recognition to the MonetDB client example. It behaves like the PostgreSQL interactive terminal: it defaults to auto commit mode, but once it encounters 'BEGIN TRANSACTION;' or 'START TRANSACTION;' it disables auto commit mode. Upon 'COMMIT;' or 'ROLLBACK;' (outside the transaction) auto commit mode is turned on again.
Added transaction recognition to the MonetDB client example.
It behaves like the PostgreSQL interactive terminal: it defaults to auto
commit mode, but once it encounters 'BEGIN TRANSACTION;' or 'START
TRANSACTION;' it disables auto commit mode.
Upon 'COMMIT;' or 'ROLLBACK;' (outside the transaction) auto commit mode
is turned on again.

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