START TRANSACTION()		 SQL Commands		   START TRANSACTION()



NAME
       START TRANSACTION - start a transaction block


SYNOPSIS
       START TRANSACTION [ transaction_mode [, ...] ]

       where transaction_mode is one of:

	   ISOLATION LEVEL { SERIALIZABLE | REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED }
	   READ WRITE | READ ONLY


DESCRIPTION
       This  command begins a new transaction block. If the isolation level or
       read/write mode is specified, the new transaction has those  character-
       istics,	as  if SET TRANSACTION [set_transaction(7)] was executed. This
       is the same as the BEGIN [begin(7)] command.

PARAMETERS
       Refer to SET TRANSACTION [set_transaction(7)] for  information  on  the
       meaning of the parameters to this statement.

COMPATIBILITY
       In  the	standard,  it  is  not necessary to issue START TRANSACTION to
       start a transaction block: any SQL command implicitly begins  a	block.
       PostgreSQL's  behavior can be seen as implicitly issuing a COMMIT after
       each command that does not follow START TRANSACTION (or BEGIN), and  it
       is  therefore  often  called ``autocommit''.  Other relational database
       systems may offer an autocommit feature as a convenience.

       The SQL standard requires commas between successive  transaction_modes,
       but for historical reasons PostgreSQL allows the commas to be omitted.

       See  also  the  compatibility  section of SET TRANSACTION [set_transac-
       tion(7)].

SEE ALSO
       BEGIN [begin(7)], COMMIT [commit(l)], ROLLBACK [rollback(l)], SAVEPOINT
       [savepoint(l)], SET TRANSACTION [set_transaction(l)]



SQL - Language Statements	  2010-12-14		   START TRANSACTION()